Pakistan is a country in South Asia whose physical geography is shaped by three contrasting zones: the high mountains of the north and northwest, the arid Balochistan Plateau and deserts of the west and south, and the fertile Indus plain that carries most of the population. It borders Afghanistan, Iran, China, and India and has a coastline on the Arabian Sea. Its landforms come from the collision of the Indian and Eurasian plates, which built the Himalayas, the Karakoram, and the Hindu Kush. The mountains hold a large glacier system, and their meltwater feeds the Indus River system that supports almost all of the country's agriculture. The entry should make clear that Pakistan's geography cannot be separated from its water: the same monsoon and glacier cycles that give life to the plains also produce recurrent floods and drought.
The entry explains how these physical features produce the country's climate, water resources, natural hazards, and settlement patterns. It moves from the territory and its geological origins, through the mountain, river, and desert systems, to the climate regimes and the monsoon rains that drive the seasonal cycle. Later sections cover the hydrology and irrigation network, the hazards that have grown more severe with climate change, the distribution of natural resources, ecosystems, and the 2023 census data on population and urbanisation. The final sections address administrative regions, land use, infrastructure corridors, and the country's vulnerability and adaptation strategies.
Because the country is large and its physical systems vary from sea level to above 8,000 metres, the entry should treat each region concretely and tie figures to their sources. It should separate the physical geography, which is the focus of this entry, from the political and historical questions that go beyond it, and it should note where official statistics differ.
Location, borders, and territorial extent
Pakistan lies in South Asia, but its territory reaches toward West and Central Asia. Its position between the Himalaya and the Karakoram in the north and the Arabian Sea in the south makes it a meeting point of the three regions, and one reference describes it as lying at a crossroads of the Middle East, Central Asia and South Asia. The Arabian Sea forms the southern edge, and the coastline is commonly given as 1,046 km, with some compilations giving other figures. Pakistan also has maritime boundaries with India and Iran and lies close to Oman across the sea. Its land borders are with Afghanistan to the northwest (about 2,430 km in many references, though some give 2,640 km along the Durand Line, which runs from the Hindu Kush toward the Pamirs), Iran to the west and southwest (about 909 km), China to the northeast (about 523 km, with some sources giving 596 km), and India to the east (about 2,912 km, with some sources giving 3,320 km). The variation between sources reflects differing measurement conventions and contested sections, so these figures should be read as approximate.
Pakistan's total area is most often given as 881,913 km², a figure that includes water. The United Nations and the Pakistani government give 796,095 km², of which about 770,875 km² is land, and the exact size is regarded as debated because of the disputed border with India. The country is divided into four provinces (Punjab, Sindh, Khyber Pakhtunkhwa and Balochistan), the Islamabad Capital Territory, and two separately administered areas: Gilgit-Baltistan and Azad Jammu and Kashmir. Pakistan administers both territories, which form part of the wider Kashmir region. Kashmir is subject to a territorial dispute between Pakistan and India, and the two countries hold different positions on its status. Pakistan's northern areas also border the Wakhan Corridor, where Tajikistan has claimed a border through territory controlled by Afghanistan.
The modern boundaries were largely set during the partition of British India in 1947. Under the plan announced on 3 June 1947, the provinces of Punjab and Bengal were divided by two boundary commissions. Each was chaired by the British lawyer Sir Cyril Radcliffe and included four High Court judges, two nominated by the Indian National Congress and two by the Muslim League. The Radcliffe Award was published on 17 August 1947, two days after independence, and it was made public only after the two new states had come into being. Outside Punjab and Bengal, the boundary followed existing provincial lines and was not drawn by the Radcliffe commissions. In Punjab, the award left Gurdaspur district divided in a way that gave India a land route to Jammu and Kashmir, and Pakistan has argued that the award was altered before publication. The boundary shaped the country's form at its inception: at independence, Pakistan consisted of two wings separated by roughly 1,600 km of Indian territory. The eastern wing became the independent state of Bangladesh in December 1971, so the present country is compact and continuous, with its territory concentrated on the Indus plain and the western highlands.
The Balochistan Plateau accounts for a large part of the national land area. Balochistan covers 347,190 km², which is about 43.6 per cent of the country's total area. The province is the largest by area but the least populous proportionally: the 2023 census recorded 14,894,402 people there, which is roughly 6 per cent of the national total of 247.54 million (a calculation based on the census figure). The province's terrain is dominated by mountains and deep basins, and only about 5 per cent of its land is arable because of its arid climate. Its 760 km of coastline along the Arabian Sea includes the ports of Gwadar and Pasni, and the Makran Desert covers about 36,000 km² within the province. The contrast between the province's large area and its small population is therefore a direct consequence of the plateau's aridity and rugged relief.
Geological setting and tectonics
Collision and the making of the highlands
Pakistan's mountain relief is the product of the Indian Plate moving north and colliding with the Eurasian Plate. The Indian Plate has undergone a northward shift and intercontinental collision with Eurasia, which uplifted the Himalayas and produced features such as the Indo-Gangetic foredeep and the Tibetan Plateau. Estimates of when the collision began vary. Northward drift slowed to around 4–6 cm per year between about 50 and 40 million years ago, which is interpreted as the start of the collision, the closure of the Tethys Ocean, and the start of Himalayan uplift. Other reconstructions place first contact nearer 55 million years ago, and a two-stage model distinguishes an earlier "soft" contact from a later "hard" collision.
Because both continental plates are too buoyant to subduct, the crust absorbed the compression. Neither plate could be subducted, so the continental crust thickened through folding and faulting, pushing up the Himalaya and the Tibetan Plateau. In the north-west, the Hindu Kush belongs to the same orogenic system, and it formed as the collision progressed. The Indus suture zone marks the line where the Indian margin met the Asian side. Marine sedimentation ended along the collision zone, and continental sedimentation began along the suture and the Tethyan Himalaya to the south. Before the closure, thrust sheets of ophiolites and a Cretaceous island arc sequence (the Kohistan-Dras arc) were pushed southward onto the Indian continental margin. These rocks now form much of the Kohistan region.
Ongoing uplift and active faults
The convergence remains active. Along the northern margin, the boundary is defined along the Main Himalayan Thrust, where the Indian Plate is colliding with the Eurasian Plate. Rates differ by segment: one estimate gives about 17 mm per year along that thrust and a smaller right-lateral movement on the nearby Karakoram fault system. In the west, convergence is far more oblique. The relative northward motion of the Indian plate, about 40 mm per year, meets the plate boundary at a low angle. Most of that motion is taken up by strike-slip faulting. In the Balochistan region, the convergence is highly oblique, involving the large Chaman Fault, a left-lateral strike-slip structure. Alongside it lies the Sulaiman fold and thrust belt.
The Chaman Fault is the most important western structure. Its slip rate is put at approximately 30 mm per year in one probabilistic hazard study. The same study identifies thrust faults such as the Main Boundary Thrust, the Punjal Thrust, the Salt Range Thrust, and the Himalayan Frontal Thrust as active crustal sources in the north and east. Seismic hazard is highest in the north and north-west, around the Hindu Kush, Pamir, and Karakoram zone, and in the west near Quetta, Ziarat, and Chaman. In the south-west, the cities of Gwadar, Kharan and Panjgur have higher hazard values, governed mainly by the Makran Subduction Zone. Southern Punjab, by contrast, has comparatively low hazard.
The record of destructive events is long. In 1935, an earthquake on the northern Chaman Fault killed more than 30,000 people and destroyed the town of Quetta. The 2013 Awaran earthquake, of magnitude 7.7, had its epicentre on a splay of the Chaman system. In the north, the 2005 Kashmir earthquake probably occurred on one of these major faults near Muzaffarabad. Deep events beneath the Hindu Kush also matter. The 1983 magnitude 7.4 quake occurred about 214.5 km beneath the Hindu Kush mountains, and it was caused by faulting within the descending slab rather than at the surface.
The older framework of Balochistan and the Salt Range
Balochistan's older geology is built from arc, basin, and accretionary units. From north to south, the Balochistan basin comprises the Kakar Khorasan basin east of the Chagai magmatic arc, the Hamun-i-Mashkhel basin and the Kharan platform, the Siahan range, and the Makran accretionary prism.
The Makran accretionary prism is the most distinctive element. It developed as the Arabian Sea floor was subducted from the Late Cretaceous onward. It is among the largest sub-aerial accretionary prisms in the world. Its sediments were largely supplied from the Proto-Indus fan. Sediment on the oceanic basement reaches around 7 km in thickness. Unlike many subduction zones, Makran lacks a clear oceanic trench. Off the coast, the prism joins the Chaman–Ornach–Nal fault system in a triple junction near Karachi.
The Salt Range and Potwar Plateau in northern Punjab have a different structure. They are a folded thrust belt in which Phanerozoic marine and evaporite strata are stacked over the Indian plate margin, with the Salt Range Thrust forming their southern boundary. These rocks record earlier marine conditions in the region that were overtaken by the later orogeny.
Uplift, erosion, and sediment supply
Tectonic uplift creates the relief that drives erosion. Rocks in the Himalaya, Karakoram, and Hindu Kush are broken by faults and weathered, and glacial and fluvial processes carry the debris downslope. The Indus and its tributaries deliver this sediment to the plains, where it has built the alluvial plain and the delta. Because uplift continues, the sediment supply that feeds these lowlands is renewed continually, while the balance between uplift, erosion, and deposition determines the shape of the coast and the river's course.
Mountain systems and highlands
Pakistan's north and west are dominated by three great ranges. The Himalayas run across the north-east, the Karakoram lies to their north-west, and the Hindu Kush extends into the north-west. Further south-west, the lower Sulaiman and Kirthar ranges form the western edge of the country. The Karakoram contains most of the highest summits. K2, at 8,611 metres, stands on the border with China and is the second-highest mountain on Earth. Pakistan also holds five of the world's fourteen peaks above 8,000 metres, four of which cluster near Concordia in the Baltoro region. The highest peak of the Himalayan part of the country is Nanga Parbat, at 8,126 metres. It is a massif south of the Indus in Gilgit-Baltistan, with a long main ridge and steep faces on its southern and northern sides. In the Hindu Kush, the highest summit is Tirich Mir, at 7,708 metres.
Where these ranges converge, they form a dense network of deep valleys. The Hunza valley is hemmed in by high Karakoram peaks. The Gilgit valley opens where the Gilgit River meets the Indus. The Kohistan stretch follows the upper Indus through narrow gorges, and Chitral lies in a valley beneath the Hindu Kush. Each valley is partly isolated by high passes and steep side slopes. Roads must be cut into unstable rock, and they are often closed by snow, landslides, or river floods. For this reason, many settlements in the north have historically been connected to the outside world by footpaths and seasonal tracks, and their economies have depended on the small amount of level land that lies along the rivers. Settlement therefore clusters on river terraces and alluvial fans, where irrigated fields are concentrated.
South of the mountain front, the Potohar Plateau forms a transition zone between the highlands and the Indus plains. It lies between the Indus and the Jhelum rivers and rises gently to a few hundred metres above sea level. Its surface is covered by fine wind-blown and river-deposited sediment, which is easily cut into gullies and ravines by runoff. The Salt Range forms its southern edge as a low, east-west ridge. The range reaches roughly 1,500 metres at its highest point, and it is known for its salt deposits. Because the plateau receives more rain than the southern plains, especially in winter, it has supported farming and dense settlement, and the cities of Rawalpindi and Islamabad now occupy its northern part.
Elevation strongly controls vegetation. In the foothills, below roughly 1,500 metres, dry subtropical forest and scrub grow, with chir pine common on the lower slopes. At middle elevations, moist temperate forests of oak, pine, cedar, and fir take over, though this forest has been heavily reduced by logging and grazing. Above the tree line, subalpine birch and juniper give way to alpine meadows, which herders use as summer pastures. Above these meadows lie bare rock, scree, and permanent snow and ice. The Karakoram and the upper valleys to its north are also an important exception to this pattern. Their high ranges block most monsoon moisture, so the leeward valleys are arid and cold, with sparse vegetation that depends on glacier-fed irrigation.
Glaciers and the cryosphere
Number and distribution
The count of Pakistan's glaciers depends on the inventory used. A figure of more than 7,250 comes from older catalogues, while a joint study by the Ministry of Climate Change and the Italian research body EvK2CNR identified more than 13,000 glaciers in the country. Almost all of them are located in the northern regions, in Gilgit-Baltistan and Khyber Pakhtunkhwa. The ice is spread across the Hindu Kush, Himalayas and Karakorum, and the Karakoram is often singled out as the densest store of ice beyond the poles. Because these ranges sit in the country's far north, the cryosphere there is far more extensive than anywhere in the lowlands, and the glaciers of the Himalaya and Karakoram belong to the same high-altitude glacier system.
Role in the Indus flow
Snow and ice melt supply a large part of the river flow in the Indus system, but published shares vary with basin boundaries and methods. One estimate attributes 40.6% of runoff in the Upper Indus Basin to glacier melt. Another analysis of the Upper Indus finds that snow and ice melt account for 51% of the total runoff, and a recent basin model concludes that cryospheric melt supplies about two-thirds of total basin runoff.
The melt regime is strongly seasonal. In the recent model, snowmelt contributions attained 20.70–21.78% during April–May, whereas glacier melt exceeded 40% during August–September, and collectively, meltwater supplied 55.50% of August runoff. Monsoon-fed tributaries behave differently: their remaining streamflows are contributed by the summer monsoon and the winter seasonal precipitation runoff. In practice, the upper Indus peaks in summer, when heat drives melt, whereas rain-driven flows respond to the monsoon and to winter precipitation. Snow and ice melt therefore sustain dry-season flow in the upper basin in a way that rain-fed rivers in the south cannot.
Retreat and glacial lakes
Glacier retreat is well documented. Reporting in glaciers in Pakistan are receding, in line with other alpine areas. One decadal analysis found that the glacier share of runoff rose from 19.22% to 51.65%, concurrent with a glacier thinning of 152–160 mm/y, and it concludes that runoff is increasingly reliant on a shrinking glacial store.
As glaciers thin and retreat, meltwater collects in hollows and behind moraine and ice dams, forming glacial lakes. A total of 3,044 glacial lakes have developed in Gilgit-Baltistan (GB) and Khyber Pakhtunkhwa (KP). Of these, 33 glacial lakes have been assessed to be prone to hazardous glacial lake outburst flooding (GLOF).
A GLOF occurs when the natural dam holding back a lake fails. Rapidly expanding glacial lakes could trigger GLOF incidents by destabilising natural ice or moraine dams. The released water and debris then move downvalley as a surge, producing flash floods and debris flow in narrow valleys. Such events can release millions of cubic metres of water and debris, and in these northern valleys the peak discharge depends largely on how much water the lake holds.
High-risk valleys and monitoring
Hunza is among the high-risk areas. The Shishpar Glacier near Passu is known for its surging behavior, it has periodically advanced rapidly, forming glacial lakes that pose GLOF risks to downstream communities. Its movement also threatens the Hasanabad Glacier and infrastructure in Hunza District. Upper Hunza also contains the Batura Glacier, 57 km (35 mi) long. Across the region, over 7 million people in Gilgit-Baltistan and Khyber Pakhtunkhwa are threatened.
Monitoring is a matter of physical measurement and forecasting. The GLOF project in the north combines weather monitoring stations, flood gauges, hydrological modelling and early warning systems. Its scope extends to 24 valleys across ten districts of Gilgit Baltistan (GB) and five districts of Khyber Pakhtunkhwa (KP). During warm spells, the Pakistan Meteorological Department has extended its GLOF alerts, warning that warm temperatures combined with rain could accelerate glacier melt and heighten the risk of flash floods and landslides.
The Indus River system
The Indus is the principal river of Pakistan and one of the largest in Asia. Its headwaters lie on the Tibetan Plateau near Mount Kailash. Accounts differ on the exact starting point. Hydrological descriptions place the origin at the confluence of the Sengge and Gar rivers, which drain the Gangdise Shan and Nganglong Kangri ranges, whereas the traditional source is a perennial spring, the Senge Khabab or "Lion's Mouth," not far from the sacred mountain. The Tibetan name, Sengge Zangbo, is usually translated as "Lion River."
From its headwaters the river runs northwest through Ladakh and Baltistan and reaches Gilgit, lying just south of the Karakoram range. It then bends sharply to the left after the Nanga Parbat massif and flows south-by-southwest across Pakistan to the Arabian Sea near Karachi. Reported lengths vary. One encyclopedia gives approximately 3,050 kilometres, while Wikipedia and other references use 3,180 km (1,980 mi). The river's drainage basin covers a total drainage area exceeding 1,165,000 km2, of which Pakistan holds roughly 56 per cent.
The main tributaries fall into two groups. The western or right-bank tributaries, such as the Kabul, Gilgit, Shyok and Shigar, drain the Karakoram, Hindu Kush and Afghan ranges. The Kabul joins the Indus at Attock after flowing through the Peshawar valley. The Shigar is largely glacier-fed: it is formed from the melted water of the Baltoro Glacier and Biafo Glacier, and its mean discharge is about 223 m³/s. The eastern or left-bank tributaries are the five rivers that give Punjab its name: the Jhelum, Chenab, Ravi, Beas and Sutlej. The name derives from the Persian and Indian term for "five waters." These rivers drain part of the Indian state of Punjab. Their sources are varied. The Jhelum is fed by a spring at Verinag, the Ravi rises in the Kullu hills of Himachal Pradesh, and the Sutlej rises in Tibet near Lake Manasarovar and is fed from snow and glaciers.
The five eastern tributaries join one another before reaching the Indus. The Jhelum and Ravi join the Chenab, the Beas joins the Sutlej, and the Sutlej and Chenab together form the Panjnad, which joins the Indus at Mithankot. Under the 1960 Indus Waters Treaty, the three western rivers, the Indus main stem, Jhelum and Chenab, were allotted to Pakistan, which covers about 80 per cent of the system's average flow. Flow regimes differ among tributaries. The high-altitude rivers such as the Shyok, Shigar and Gilgit respond mainly to glacier melt and summer heat, whereas the lower Punjab tributaries depend more on monsoon rain and seasonal snowmelt. Sources are not fully consistent on this point, and the balance varies by river and season.
The mean annual discharge is commonly estimated at about 207 cubic kilometres, which corresponds to roughly 6,600 m³/s. Other sources give different totals. One cites an estimated annual flow of 243 km3, about two times that of the Nile River, and another gives 238 km³/yr. The difference reflects the measurement station, the period of record and the method used. Ranked by annual discharge, the Indus is usually placed among the 25 or so largest rivers in the world, and making it the twenty-first largest river in the world in terms of annual flow is a commonly repeated figure. Discharge also changes sharply along the river. At the Tarbela Dam the average is about 2,469 m³/s for 1971–2000, while at Mithankot it is about 5,812 m³/s for the same period.
The river's seasonal hydrograph is driven by the timing of snow and glacier melt and monsoon rain. Flow is at its lowest from December to February, when the upper catchment is frozen and rainfall is minimal. There is a rise in the water level during the early summer and spring seasons from March to June, as temperatures warm and snowmelt begins. Flow then increases sharply during the monsoon, and it diminishes greatly in the winter, while flooding its banks in the monsoon months from July to September. Peak discharge generally occurs from mid-July to mid-August, when high melt rates from the glaciers coincide with heavy monsoon rainfall over the lower tributaries. The range at the delta is wide, from a minimum of about 1,200 m³/s to a maximum of about 58,000 m³/s, which makes the river's floods among the most dangerous in the region.
Indus plain and alluvial lowlands
The Indus plain is the lowland built by the Indus and its tributaries across Punjab and Sindh. Its alluvial plain area is about 207,200 km², while its deltaic area is about 20,000 km². Geomorphologists regard the floodplain as one of the largest and most dynamic alluvial landscapes in the world, shaped by seasonal floods and by continuous erosion and deposition of sediment. The relief is very flat. The upper plain in Punjab is cut into doabs, the tracts of land between tributaries, which contain active floodplains, older floodplains and alluvial terraces. The Lower Indus Plain is flatter and contains meanders, levees, and oxbow lakes along its active flood plain as well as alluvial fans along mountain ranges.
The soils are renewed by the river itself. Each flood season leaves fine silt and clay on the floodplain, and in comparable alluvial terrain in northwest India, sandy soils at the margins of former channels have been seasonally replenished with water, silt, clay, and fine organic matter, considerably enhancing their capacity for water retention and fertility. Combined with canal irrigation, this makes the plain intensively cultivated. The section supports dense population and intensive agriculture, sustained by one of the world's largest canal irrigation networks.
The river's course has changed repeatedly. Its channel builds up on ridges of its own deposits until it breaks to one side and starts again. The Indus has always built up its bed and run along broad 'ridges' of its own creation, till it slips off to one or other side and starts the process anew. Abandoned channels preserve the record of these shifts; the modern contours afford clear evidence of the different courses taken by it over a period of several thousand years. One estimate for roughly 2,500 years reports 50 major floods, 1,500 dike breaks, and 20 changes of course. Over the longer term, the lower river has tended to drift westward, which is why dry paleochannels such as the Hakra lie east of the present course.
Natural levees, formed when floodwater spills over the banks and drops its sediment, line many channels, and the river's flood zone is a dynamic belt rather than a fixed strip. The riverside tract known locally as khaddar or bet is often called "the summer bed of rivers," as it is inundated almost every rainy season. Engineered embankments now restrict the river in many places. Entering Sindh, a meandering channel is held within a 15- to 20-km-wide floodplain by artificial levees or "bunds," while historical floodplain lands more than 200 km wide lie on either side and have seen earlier shifts of the channel. In the nineteenth century, the active floodplain comprised almost the entire area between the Indus River and its left-bank tributaries. Later development necessitated the construction of levees along the rivers to protect the infrastructure there. The levees divide the land into protected areas and areas that remain exposed. In 2010, the Tori Levee breach on the right bank, downstream of the Guddu Barrage, caused residual floods in northern Sindh and the adjoining regions of the Balochistan province.
Settlement has long adjusted to these conditions. Archaeological work in northwest India found that earlier settlements were typically placed on sandy levees and/or riverbank deposits associated with former channels, which would have situated settlements above the level of seasonal floodwater. The town of Dera Ghazi Khan on the west bank shows the risk in practice. Its original site lay about 15 km east, inside the active floodplain, and a flood destroyed the historical town in 1909, and the modern settlement was founded in its current location in 1911.
The major cities of the plain are tied to the river system in different ways. Lahore lies on the Ravi, one of the tributaries that give Punjab its name. Faisalabad sits in the doab between the Chenab and the Ravi. Multan lies on the southern Punjab plain close to the Chenab. Hyderabad lies on the eastern side of the lower Indus, near the Kotri Barrage. Sukkur is a notable case of the relationship between the river and settlement: the town sits on a bedrock surface 10 to 15 m above the locally confined river channel, and the Sukkur Barrage diverts up to 50% of the Indus discharge via a series of feeder canals.
Balochistan Plateau, deserts, and arid zones
The Balochistan Plateau is a broad tableland in western Pakistan, with mountains, basins and desert surfaces. It is a vast tableland in western Pakistan, characterized by diverse physical features including mountains, basins, and arid deserts. Its average altitude is about 610 metres, the average altitude of Balochistan Plateau is 2,000 ft (610 m), but its basins and upland plateaus rise considerably higher. The Kalat Plateau in the centre, for example, lies at roughly 2,135 to 2,440 metres. Kalat Plateau at 7,000-8,000 ft. (2,135-2,440 m), in the centre of Balochistan is the most important plateau.
The plateau is encircled by ranges on most sides. The Toba Kakar and Chagai hills in the north form part of the border with Afghanistan, the Siahan Range lies in the west-central part, and the Makran Range occupies the south-east. In the north are the Toba Kakar Range and Chagai hills which form the border of Pakistan with Afghanistan for some distance. In the west-central part is the Siahan Range and in the east-southern corner the Mekran Range. To the east, the Sulaiman and Kirthar ranges separate the plateau from the Indus plains. Within the plateau, the largest of the dry lakes (hamuns) is Hamun-i-Mashkhel, and western Balochistan has sun-cracked clay, oxidized pebbles, salty marshes and crescent-shaped moving sand dunes.
Rainfall decreases steeply from east to west. Balochistan has an arid or semi arid climate with annual precipitation varying from 50 mm in the west to over 400 mm in the east. The climate itself changes across the province, from hyper-arid in the southwestern zone to semi-arid in the northeastern part. This gradient sets firm limits on farming. Arid and semi arid areas of Balochistan are characterized by low and erratic rainfall and are prone to drought conditions which normally occur every three to four years. Cultivation therefore concentrates where water can be captured, and agriculture is limited by water scarcity, with wheat, sorghum, and rice as major crops, and sheep raising being a significant occupation.
The southeastern part of the Indus plain, from eastern Bahawalpur to the Thar Parkar region, is a typical desert and an extension of the Thar Desert. The desert is variously known as the Cholistan or Rohi Desert in Bahawalpur and the Pat or Thar Desert in Sindh. The surface of the desert is a wild maze of sand dunes and sand ridges. Dune height depends on age: the average height of old dunes varies from 20 to 40 m and often features copious vegetation, whereas new dunes typically range from 2 to 8 m in height. Vegetation is sparse and is adapted to dryness. These trees have small leaves with a thick waxy surface to reduce evapotranspiration and save water in hot and dry environments. Shrubs such as Acacia jacquemontii and Leptadenia pyrotechnica help hold dunes in place. In the Thar, species like Leptadenia pyrotechnica and Acacia jacquemontii are vital for maintaining dune stability, with up to 50% sand transport reduction.
Rain is the main source of water in these deserts, and it is erratic. In the Thar ecoregion, rainfall is limited to 100-500 mm from July to September but is mostly unpredictable and erratic. In Tharparkar, the most important supplies are seasonal. Groundwater can be found at depths ranging from 50 to 300 feet, with variations in salt concentration. Ponds, dugouts, and tanks filled during monsoon rainfall serve as the most favorable and accessible sources of water. In Cholistan, the rain-fed ponds known as tobas are central to life there, since seasonal rain-fed ponds (tobas) matter most for water supply in the deeper sand zones. Kharan, in western Balochistan, is a much more barren landscape, with vast flatlands, scattered rocky hills, and minimal vegetation.
The Sindh desert along the Indian border is partly separated from the irrigated plains by hydraulic features. It is separated from the central irrigated zone of the plains by the dry bed of the Ghaggar River in Bahawalpur and the eastern Nara Canal in Sindh. The Nara Canal itself takes off from the Sukkur Barrage on the Indus River and follows the ancient bed of the Hakra/Nara River. It provides freshwater to millions of acres of farmland in Khairpur, Sanghar, Mirpurkhas, and Umerkot. Irrigation has transformed desert land elsewhere too: the Jinnah Barrage, built in 1946, supplies the Thal canal system, which has turned parts of the desert into fertile cultivated land. Tharparkar has had less success with canal supply. There is no canal or stream in the District. Proposed canal schemes there have been delayed by disputes between provincial and federal governments. The government of Sindh and federal government have fought over water distribution for decades. Sindh has also argued that the proposed Cholistan Canal would severely reduce the Indus River's water flow downstream, a claim that is part of a wider dispute over water allocation.
Coast, delta, and maritime geography
Pakistan's Arabian Sea coastline is usually given as about 1,046 km, but published figures differ with the method of measurement. A fisheries study puts the total near 1,120 km, divided into about 348 km of Sindh coast and about 772 km of Balochistan coast. The Balochistan stretch, known as the Makran coast, runs westward from the Lasbela area toward the Iranian border. Its Pakistani section is roughly 320 km long, and most of it is sandy, with a series of hammerhead-shaped peninsulas. Behind the shore, east–west ranges rise to around 1,500 m, and the terrain is arid, with few river valleys reaching the sea. Mud volcanoes along parts of the coast mark the area's tectonic activity.
Natural harbours are scarce on the Makran coast. One regional account notes that, apart from the Pakistani ports of Pasni and Gwadar and the Iranian naval base at Chabahar, there are very few natural harbours. Other sources describe Gwadar, Ormara and Pasni as difficult to approach because of offshore sandbars. Gwadar sits on the shore facing Oman and was a possession of the Sultanate of Muscat and Oman until its purchase by Pakistan in 1958. Access to the coast was limited until the Makran Coastal Highway (N-10), about 653 km long, was built between 2002 and 2004 to link Karachi with Gwadar. Karachi, the largest city, lies on the Sindh coast west of the Indus delta. Its Chinna Creek is a shallow lagoon of about 6 km² within the city limits, and its sheltered waters serve local recreation, though the lagoon is heavily affected by urban sewage.
The Indus delta is one of the world's large deltas, with a fan-shaped form built from silt carried down from the mountains. It is cut by many distributary channels: one source counts about 17 major creeks, along with numerous minor creeks, mudflats and fringing mangrove. The delta's shoreline is commonly described as roughly 250 km long. Its mangroves, dominated by the grey mangrove Avicennia marina, were once extensive. Rising sea levels, land subsidence and falling river flows have reduced them sharply. Some accounts state that mangrove cover has fallen by about 86 per cent since the 1960s, a figure that should be read as a reported estimate. A Landsat-based study for 1990–2020 found strongly uneven change: the western delta eroded at around 10 m per year and lost about 70 km² of mangroves, while the eastern delta was comparatively stable and gained mangrove cover.
The main cause of the delta's decline is the sharp drop in sediment and fresh water reaching the sea after the construction of dams, reservoirs and barrages. A 2019 World Bank study, as cited in press reports, estimated that sediment reaching the delta had fallen from about 270 million tonnes a year before large-scale development to about 13 million tonnes. Average annual rainfall in the lower delta is very low, at about 221 mm, so there is little local freshwater to offset the lost river flow. Without a strong outflow, tides and waves reach farther inland, and seawater moves upstream in the dry season, with observations of intrusion reaching roughly 80 km. Saline water has penetrated soils and aquifers, reducing the land that can be farmed. Environmental observers have claimed that the sea has taken around 2.6 million acres in the delta region, and experts have warned that the coastal town of Shahbandar could be lost within decades if erosion continues at its current pace. These projections are contested in their details.
The delta's marine and estuarine zones provide important ecosystem services. Mangroves offer nursery habitat for fish, shrimp, reptiles and mammals, stabilise shorelines and help buffer coastal communities against storm surges. Smaller saline lagoons such as Khor Kalmat, near Pasni, cover about 102 km² and support wetland habitat, and mangroves also occur in Sonmiani Bay in Lasbela district. Fisheries have suffered as the mangroves have declined; one account reports that catches have dropped by nearly 80 per cent over three decades. Restoration programmes led by organisations such as WWF have expanded mangrove cover in some areas, and one account describes this as a notable recovery. Environmentalists interviewed in 2026, however, argue that the overall decline has not been reversed. Both assessments should be weighed against local monitoring data.
Climate regimes and precipitation patterns
Pakistan's climate changes sharply over short distances, following the country's relief. Alpine and highland conditions prevail in the Karakoram, Hindu Kush and Himalayan ranges, where winters are long and much of the precipitation falls as snow. The Indus plain and the Balochistan lowlands are semi-arid to arid, with hot summers and little rain. Sindh and the southern and eastern plains have a subtropical regime, with most of the year's rain concentrated in summer. The gradient is steepest between the northern mountains and the western deserts, and the same mountain barriers that separate these zones also shape where rain falls.
Two large-scale systems drive the seasonal pattern. The southwest summer monsoon runs from July to September. Moist air drawn from the Indian Ocean is pulled inland by low pressure created by intense surface heating, and it delivers most of the summer rainfall to the eastern and northern parts of the country. Its strength weakens as it travels west, so Balochistan receives comparatively little of it. Monsoon rainfall is also highly variable from month to month, and the irregularity often produces prolonged dry spells. The second system is the western disturbance, a winter-dominant pattern of storms that moves eastward across the region. Primary disturbances enter from Afghanistan and bring precipitation to the north, while secondary disturbances from Iran cover Balochistan, the western highlands and parts of northern and central Punjab. In the north, western disturbances supply most of the winter and spring precipitation, and fog can persist for weeks in parts of Sindh and Punjab during the cold season.
Precipitation contrasts are extreme. Murree, in the northern hills, records an average annual total of about 171 cm, while Nokkundi in Balochistan records about 3.4 cm. Annual totals fall below 10 cm in the western desert and reach roughly 50 to 60 cm along the eastern margins, and rainfall near the Himalayan foothills can exceed 100 cm a year. Orography amplifies these differences: moist air forced up the slopes of the mountains produces rain or snow, while the lee-side valleys and plains remain dry. Summer rainfall is heaviest over Kashmir and northern Punjab, whereas the far north, sheltered by the high ranges, receives very little. The outline's broader figures for lowland and slope precipitation are consistent with this pattern, but the local station data show how steep the gradient is.
Temperature extremes are concentrated in the pre-monsoon period. Heat waves usually occur in the months before the monsoon, with the most intense spells often observed from May to June. On 5 July 2025, the Pakistan Meteorological Department reported 48.5°C at Chilas in Gilgit-Baltistan, which surpassed the previous station record of 47.7°C set on 17 July 1997. On the same day, Nokkundi in Balochistan recorded 48°C. The Chilas figure is therefore a 2025 record rather than a 2026 one. Long-term analysis of gridded data for 1948 to 2010 found that heat-wave duration increased by about 0.71 days per decade, and that the area affected rose by about 1.36 per cent of the national territory per decade. Recent events have been more severe: in June 2024, temperatures reached 49°C in Sindh, and the heat wave was associated with several hundred deaths. The Meteorological Department also reported that April to July 2024 were markedly warmer than 2023 across much of the country. Heat is most damaging where it coincides with dense populations in the southeast, and the rising frequency of such events is one of the most direct effects of climate change on the country's physical environment.
Water resources, irrigation, and water management
The Indus Basin Irrigation System
Pakistan's agriculture depends on an engineered network rather than on rainfall. The Indus Basin Irrigation System (IBIS) is generally described as the largest contiguous irrigation system in the world, and about 150,000 km² of cropland out of 190,000 km² are irrigated by the system. Its design is hierarchical. River water is diverted by barrages and weirs into main canals and subsequently branch canals, distributaries and minors. Farms receive water through watercourses, supplied through outlets from the distributaries and minors.
The system's physical extent is reported in varying terms. One source gives a gross irrigable area of 16.85 million ha, 14 million of which are culturable command area, while another counts about 4 storage reservoirs, 16 barrages, 12 inter-river link canals, 59,000 km of irrigation canals and 107,000 km of watercourses. The "contiguous" label refers to connectivity between river systems. Eight inter-river canals were built between western and eastern rivers, which allows water to be moved between basins. The network was originally laid out for low-intensity irrigation to cover larger areas in the canal commands, but higher cropping intensities have since increased pressure on it.
Reservoirs, barrages, and sediment
Storage and hydropower are concentrated at a few large dams. Tarbela (completed 1976) and Mangla (1967) are the key examples, and both serve irrigation and power generation. Key infrastructure includes major dams like Tarbela (1976) and Mangla (1967), crucial for irrigation and power generation. Upstream storage also regulates the river's seasonal peak, so that a large share of the summer flood can be held back for the dry season. Reservoirs have a physical limit, however. Sediment carried by the Indus settles behind dams, which reduces live storage over time, and silt also clogs downstream channels. For example, the flow at Kotri Barrage is hampered by silt and sludge. Dams have a further downstream effect: because canal networks divert most of the river, sediment supply to the delta was also reduced considerably.
Groundwater, tubewells, and aquifer depletion
Groundwater is a large second source of irrigation water. Seepage from canals and fields recharges the plains' aquifers, which is why the basin has been described as the largest artificial groundwater recharge system in the world. Tubewells were introduced to counter the opposite problem. Tube well technology, introduced in the 1960s to mitigate waterlogging and salinity, has played a pivotal role. Their spread was rapid. Tube wells have increased by 1500% between 1975 and 2021, and groundwater abstraction increased sixfold between 1965 and 2020. Most pumping is done by individual owners, with more than 80% of groundwater exploitation done by private tube wells. Estimates of the number of wells vary. One source reports 1.2 million private tube wells, of which 85% are in Punjab, and another puts the annual volume at about 62 km³ of groundwater pumped by 1.36 million private and public tube wells. Declines are documented in several areas. The groundwater table in the Indus basin is declining at a rate of 1.5 m/year in some areas. The Indus Basin aquifer is widely regarded as one of the most overstressed groundwater reserves in the world.
Waterlogging and salinity
Salinity and waterlogging are the other side of the same water balance. These problems are the result of seepage from unlined earthen canals, inadequate surface and subsurface drainage, poor water management practices, insufficient water supplies and the use of poor quality groundwater for irrigation. The extent is large. About 6.3 million ha are affected by different levels and types of salinity, nearly half of which are under irrigated agriculture. Waterlogging is concentrated in the south. Waterlogging still afflicts 35 percent of the IBIS canal command area, mostly in the province of Sindh. Water distribution along the canals is uneven. Inadequate water allocation along the irrigation canals allows excessive water use by head-end farmers, resulting in waterlogging. In contrast, the less productive use of erratic supplies by tail-end farmers often results in soil salinity. Remedies such as deep tubewells, leaching, and drainage have had mixed results. Poor operation and maintenance of these systems, and inadequate facilities for disposing of saline drainage effluent, resulted in limited overall success.
The Indus Waters Treaty and water stress
The shared-river framework is set by the Indus Waters Treaty, which was signed on 19 September 1960 in Karachi with the World Bank as a broker. The treaty allocates the three western rivers, the Indus, Jhelum and Chenab, to Pakistan. The three eastern rivers, the Ravi, Beas and Sutlej, go to India. India can use the water from the western rivers for domestic, non-consumptive needs such as storage, irrigation, and the generation of electricity. Estimates of the resulting split differ. One source states that this division results in Pakistan receiving about 80% of the total water resources, leaving India with 20%. Dispute handling runs through a Permanent Indus Commission, and the World Bank's role is limited. Its role in relation to "differences" and "disputes" is limited to the designation of people to fulfil certain roles when requested by either or both of the parties.
The physical basis of water stress is the combination of heavy dependence on the river and rising demand. Irrigation receives 90–95% of total surface water allocations in the Indus River Basin, and the system relies heavily on glacial meltwater, with anticipated declines in river flows over the next 50 years. Per-capita water availability has been projected to fall sharply. A study of the late 1990s and early 2000s projected that per capita water availability in Pakistan will be reduced to less than 600 m³ by 2025. Recent commentary describes the treaty as struggling to adapt to changing conditions, which makes the treaty's future a physical as well as a diplomatic question.
Natural hazards and extreme events
Floods of 2010, 2022 and 2025
Most of Pakistan's severe floods share a common setup. Intense monsoon rain falls on saturated ground, steep upland catchments route water downslope within hours, and the lowland river channels and levees cannot carry the peak. The 2010 flood, which built up from late July and struck Khyber Pakhtunkhwa and Punjab hardest, covered roughly a fifth of the country and affected around 20 million people.
The 2022 floods were of a larger order. Between mid-June and October 2022, the floods killed about 1,700 people and caused damage estimated at around US$40 billion. Rainfall was the trigger, but its concentration was extreme: two atmospheric rivers channelled moisture into the country during July and August, and rainfall in Balochistan and Sindh ran at roughly four and a half times the normal level. The flood plains were already full. Saturated basins and overflowing rivers overwhelmed the natural drainage network. Glacier melt added to the load, and a heat wave that began in April had intensified the monsoon and accelerated melt in the mountains. By late August, satellite imagery from the European Space Agency showed more than a third of the country under floodwater.
The 2025 season followed a similar pattern but with a different spatial focus. Khyber Pakhtunkhwa recorded the highest death toll, with 504 deaths according to WHO data as of September. The most lethal single event was a flash flood in Buner district: a sudden cloudburst, a brief but intense rainfall that can trigger rapid flooding and landslides, struck on 15 August. In Gilgit-Baltistan, between 16 and 22 August, glacial lake outbursts caused flash floods downstream. In Punjab, the flooding was riverine: rising water along the Chenab, Ravi and Sutlej rivers forced 1.9 million people to leave submerged villages. Nationally, rains and floods killed more than 1,000 people, including 275 children, and over 6.9 million people had been affected by the end of September.
For the 2026 season, the NDMA's outlook warned of above-normal rainfall in the north, and below-average rainfall with unusually high temperatures in the south and plains. Interim tolls reported by media citing the authority were 107 deaths by late July, and an NDMA situation report later put the count at 126 deaths since 26 June. These are interim figures, and the final totals should be checked against NDMA reports before publication.
Glacial lake outburst floods
Glacier retreat leaves meltwater ponded behind moraine dams made of loose rock and debris. If such a dam fails, water cascades down the valley with destructive force. The NDMA has identified Gilgit-Baltistan and parts of Khyber Pakhtunkhwa as particularly vulnerable to outburst floods, flash floods, mudslides and landslides. These events are sudden and hard to predict, which is why they are discussed alongside glacier retreat and early-warning capacity in the cryosphere section.
Earthquakes
The seismic hazard is concentrated in the north and west, where the collision of the Indian and Eurasian plates is still active. The principal structures include the Main Boundary Thrust along the Himalayan front, the Main Karakoram Thrust, the Chaman fault in the west, and the Makran subduction zone along the southern coast. The 2005 Kashmir earthquake (magnitude about 7.6) caused tens of thousands of deaths in Pakistan, mostly in Kashmir and the Khyber Pakhtunkhwa hills, largely because of collapsed unreinforced masonry houses and schools. The 2013 Awaran earthquake in Balochistan, of magnitude about 7.7, showed the risk in the west, where rural building stock is also weak. Deep intermediate-depth earthquakes in the Hindu Kush, such as the 2015 event centred in Afghanistan, are felt strongly in northern Pakistan.
Landslides and debris flows
In the Murree hills near Islamabad, slopes are formed of weak sedimentary rock such as clay, shale and sandstone that weathers quickly. Road cutting and housing on steep slopes remove support, and monsoon rain saturates the soil and adds weight. Tree cover that once held the surface has been lost in many areas, which increases erosion and makes the hillsides more vulnerable to heavy rain, although this link is most clearly documented on degraded slopes. In Gilgit-Baltistan, steep valley walls and loose glacial and colluvial deposits produce frequent slides and debris flows. The most consequential example is the Attabad landslide of January 2010 in the Hunza valley, which blocked the river, created a lake behind the dam and forced evacuation of upstream villages. Such temporary dams can fail suddenly and generate flash floods downstream.
Droughts and heat waves
Balochistan is the most drought-prone province because its rainfall is low and erratic, and dry years reduce pasture and groundwater recharge. Sindh's Thar desert and the Tharparkar district are similarly exposed. Authorities warned that southern Pakistan and the plains may experience temperatures well above seasonal averages, increasing the risk of drought-like conditions and heat-related emergencies. Heat waves in the plains are most dangerous in May and June, and the 2022 episode demonstrated how an early heat spell could alter the entire monsoon sequence.
The dry season links directly to river flow. The Indus is at its lowest from December to February, when snowfall is limited and monsoon rain is absent. In years of poor snowpack or weak monsoon, lower surface runoff reduces the water available for canal irrigation, hydropower and the delta's freshwater inflow, placing the most pressure on farmers and cities in Sindh.
Natural resources and energy geography
Pakistan's energy supply rests on a small set of domestic resources, and the balance has shifted toward imports over the past two decades. Natural gas has been the largest domestic source, but its share has fallen. The Asian Development Bank Institute put gas at roughly half of primary energy in 2005 and about 35 per cent in the late 2010s, while the International Energy Agency gave a 28.2 per cent share of total energy supply for 2023. Gas production has declined since peaking around FY2012, and the country has imported liquefied natural gas since 2015. Proven reserve figures differ by source. Worldometer lists about 18.5 trillion cubic feet, roughly 22 years at current output, whereas basin-level studies cited by the Pakistan Institute of Development Economics point to a much larger resource base of about 282 trillion cubic feet, most of it not yet proven.
Gas fields are concentrated in a few areas. The first discovery, in 1952, was in Balochistan near the large Sui field, and the Toot oilfield in northern Punjab was found in the early 1960s. Sindh holds the largest remaining share of recoverable gas. Oil is more limited: an official report cited in the press indicated that most of the known oil reserves had already been consumed, so the country depends heavily on imported petroleum products.
Coal
The most important coal resource is the Thar coalfield in eastern Sindh, which covers about 9,000 square kilometres. Estimates of its lignite run to roughly 175–200 billion tonnes, which places Pakistan among the holders of the world's largest lignite resources. Most of the coal is lignite, a low-rank fuel, and the seams lie at depths of roughly 130 to 250 metres in multiple layers. The deposits were found in the late 1980s during drilling for water wells in Tharparkar. Smaller coal deposits occur in Balochistan, Khyber Pakhtunkhwa and Punjab, but their output is modest. Thar lies several hundred kilometres from Karachi, so road and rail haulage and transmission lines are central to its development. A 660 MW lignite-fired plant at Thar Coal Block II began operating in 2019, illustrating how mine-mouth power generation is used to avoid long coal transport.
Hydropower
Hydropower is the country's most significant renewable resource. Estimates of technically feasible potential are around 60,000 MW, but a study using installed capacity data from the late 2000s found that only about 11 per cent had been developed. The Indus basin holds about three-quarters of this potential. Provincial estimates cited in the literature give Khyber Pakhtunkhwa about 24,700 MW and Gilgit-Baltistan about 21,700 MW, with Azad Jammu and Kashmir and Punjab holding smaller shares. The upper Indus basin supplies roughly half of the country's surface water, and the largest reservoir, Tarbela, has about 3,500 MW of installed capacity. Because the river's flow peaks with snowmelt from late May to late July, hydropower output is tied to the timing and volume of glacier and snow melt, as well as to monsoon rains. Glacier-dependent hydropower is estimated to supply around 29 per cent of national electricity, and changing melt patterns therefore affect generation directly. Studies of the Indus basin have also identified large, low-cost potential for seasonal pumped storage, because the mountain topography offers high head and large water volumes.
Solar and wind
Solar and wind resources are concentrated in the arid south and west, where high sunshine is combined with extensive open land. Solar capacity has grown quickly in recent years, with installed capacity reported to have passed 30 GW by mid-2026. Wind resources are concentrated along the coastal zone of Sindh, around Gharo and Keti Bandar and the Jhimpir area, where a strong and persistent onshore airflow supports turbine installations, and parts of the Makran coast in Balochistan also have potential. Overall renewable potential is estimated at about 167.7 GW, but much of it lies far from the main load centres in Punjab and Karachi, so its realisation depends on transmission capacity, grid stability and storage. Desert locations also present dust and water-access issues for large solar installations.
Minerals
Apart from fuels, Pakistan has notable mineral deposits. Copper and gold occur in the Chagai district of Balochistan, where large projects have been developed or proposed. Rock salt is mined in the Salt Range of Punjab, which also contains extensive limestone. Iron ore deposits are present but comparatively small, mainly in Punjab and Khyber Pakhtunkhwa. Limestone is widely used in cement production, and the Salt Range and parts of Balochistan are its principal sources.
Ecosystems and biodiversity
Principal ecosystem types
Pakistan's ecosystems follow the steep elevation gradient that runs from the Arabian Sea to the high peaks. Coastal and deltaic systems form a distinct group. The Indus Delta has the largest area of mangrove forest in an arid climate. The Indus delta mangroves forest are unique in being the largest area of arid climate mangroves in the world. Existing estimates show that mangroves cover approximately 129,000 ha in the Indus Delta and about 3,000 ha on the Baluchistan Coast, so the delta holds the great majority of the national total. Its mangroves are dominated by one species, since nearly 95% of the mangroves located in the Indus River Delta are of the species Avicennia marina.
Inland, the plains support riverine and floodplain vegetation along the Indus and its tributaries, while the Thar, Cholistan and Kharan deserts hold sparse, drought-adapted cover and seasonal wetlands. In the north, forests and alpine meadows give way to bare rock above the snowline. Pakistan's terrestrial habitats also include the subtropical scrub of the foothills and the dry hills of the west, which are described in the physical-geography sections of this entry.
Freshwater fauna of the Indus
The Indus river dolphin (Platanista minor) is the best-known freshwater species of the system. Only about 1,000 of this unique species exist today in the lower reaches of the Indus River in Pakistan. Its numbers have fallen sharply over the past century. When the Indus Dolphin Reserve was designated in 2001, it covered a 170 km stretch of the River Indus between the Sukkar and Guddu barrages, which was then home to about 500 animals. The Chashma and Taunsa barrages also host a sanctuary for the species.
The dolphin's decline reflects the changed hydrology of the river. Dams hold back water and sediment, and dams along the river reduce flows, particularly in lower parts of the Indus River, limiting the transport of much-needed fertile sediments downstream into the delta. They also fragment freshwater habitat, posing a serious threat to the survival of the river dolphin and other species. Canal networks add further risk, and rescue teams have retrieved dolphins that became trapped in irrigation channels. Pollution and poaching compound these pressures. Water abstraction for irrigation, agricultural chemical runoff and introduced species also affect the delta's freshwater life.
Threats to forest cover
Forest cover is low by international standards, and estimates differ with definitions and dates. A 1996 government figure put forests at approximately 4.58 million ha (5.7 percent), while a more recent report puts the share at just 5.1 percent of the total land area. Whatever the baseline, the trend is one of loss. WWF-Pakistan estimated in 2025 that Pakistan loses 11,000 hectares of forest cover each year through deforestation, wildfires, climate change and conversion of forest land. Earlier FAO-based figures for natural forest were higher, at about 27,000 ha per year.
The drivers are mostly human. Research on forest change points to rapid population growth, rising urbanisation, high poverty and shortage of energy such as gas as main causes. Forest clearance for fuel and timber, overgrazing and illegal logging also reduce tree cover in the mountains. In the mangroves, deforestation has been driven primarily by state-authorized commercial harvesting and unregulated, open-range livestock grazing. Physically, the consequences are predictable. Loss of canopy and ground cover weakens soil structure on steep slopes, increases surface runoff during heavy rain, and accelerates erosion and sediment delivery to rivers. The same processes reduce the capacity of the land to hold water in the wet season.
Protected areas and wetlands
Pakistan joined the Ramsar Convention in 1976, and the Geographical Information System (GIS) database for wetlands in Pakistan recognises 225 significant wetland sites across the country, including 19 recognised as Ramsar sites of global significance. These sites range from large reservoirs to coastal lagoons. The Indus Delta is among the largest, with a Ramsar area of 472,800 hectares. The Hub Dam and Keenjhar Lake are both important for Karachi's water supply, and as many as 140,000 birds have been recorded on Keenjhar Lake during breeding, staging and wintering periods. Inland, Deh Akro-II is a mainly inland wetland ecosystem of about 20,500 hectares.
Coastal protection has become more formal. In 2022, the Balochistan provincial government, which looks after all three of Pakistan's MPAs, declared Miani Hor's mangroves a protected forest. The root systems of mangroves help them withstand storms and limit coastal erosion, and they also store carbon. Wetlands and floodplain lakes absorb and slow floodwaters, trap sediment and buffer water supplies, so their loss increases flood and drought risk downstream. Those benefits are under pressure. Wetlands in Khyber Pakhtunkhwa have shrunk or completely disappeared due to encroachment by humans, pollution or climatic changes, and the Indus Delta's mangroves have declined, with the latter two species declining, including in the Indus Delta in Sindh province.
Population distribution and urbanisation
The 2023 Population and Housing Census was the seventh national census and the first digital one in Pakistan. It was also the first ever digital census to be held in Pakistan, and the first in South Asia. Enumeration was scheduled for March 2023, but it ran until late May because incomplete enumeration in large cities such as Karachi, Lahore, and Faisalabad, where people are more mobile and therefore harder to count, and in remote and rural Balochistan required extra time.
The first official total was 241.49 million. The later figure of 247,541,947 is the one most reference compilations now cite. The gap of roughly six million is close to the combined population of Azad Jammu and Kashmir and Gilgit-Baltistan, which were not part of the early tally because Azad Kashmir and Gilgit-Baltistan's census data is yet to be approved by CCI Council of Pakistan. Gilgit-Baltistan alone recorded about 1.7 million residents, making it the least populous unit. Least populous province: Gilgit-Baltistan (1,709,049). Growth has slowed from earlier decades but remains high: the annual rate was documented at 2.55%, and the figure is relatively high, although declining, growth rate supported by high birth rates and low death rates.
Population is very unevenly spread. Punjab held about 127.7 million people in 2023, or roughly 52.9 per cent of the national total. Punjab also added the most residents between 2017 and 2023, Punjab recorded the highest population increase with 17.7 million. The fastest rate of growth in the period was in Balochistan, the population growth rate of the southwestern Balochistan province was 3.2%. This growth starts from a very small base: Balochistan covers the largest share of the territory but remains the least densely settled of the major provinces. Settlement follows the Indus plain, where irrigated farming, river water and groundwater supply support dense rural and urban populations, whereas the arid plateau and the mountain north remain thinly populated. The national average is about 261 people per square kilometre, a figure that hides these sharp contrasts. The country recorded a total of 38,340,566 households, reflecting a significant increase from 32,205,111 households in 2017. Average household size has slightly decreased to 6.30 members, down from 6.45 in 2017.
The urban share has risen steadily. Urban population is 93.88 million (38.88%), up from 36.4% reported in the 2017 census. Other analyses give somewhat different shares; one Gallup analysis puts the urban share at 39.9%. Such differences partly reflect how urban localities are defined. Some analysts argue that the 2023 census shows urbanisation in Pakistan exceeds official definitions.
City growth is concentrated at the top of the hierarchy. Ten cities in Pakistan have population exceeding one million: Karachi (18.87M), Lahore (13M), Faisalabad (3.69M), Rawalpindi (3.36M), Gujranwala (2.67M), Multan (2.22M), Hyderabad (1.92M), Peshawar (1.91M), Quetta (1.57M), and Islamabad (1.11M). These cities collectively account for over 20% of Pakistan's total population and 54% of its urban population. As of the 2023 Pakistani census, there are two megacities with a population of over ten million in Pakistan. Counts of cities above 500,000 vary by source. Dawn reports that in 2017, there were 14 cities with a population of 500,000 or above. Six years later, the number increased to 22. A Gallup analysis, however, counts 46 large cities (with populations over 500,000) host 55% of all urban residents, and a Friday Times analysis counts only 14 were 0.5 million or more in population. The differences likely come from differing definitions of city limits and urban localities, so the exact number should be read with caution.
Urban areas are growing faster than the countryside. Dawn reports that the former going up at the rate of 1.88pc and the latter 3.67pc, meaning the cities expanded at roughly twice the rural rate. This gap is consistent with rural-to-urban migration adding to natural increase in cities. The consequences for infrastructure are substantial. The Asian Development Bank expects the pressure on cities mired in ever-increasing deficits in urban infrastructure and services will intensify, with urban population projected to climb to 99.4 million, or 40.7% of the country's total, in 2030. Housing, water supply and sanitation are the most immediate pressures, and they fall on cities that already face shortages. Growth on low-lying floodplains raises flood exposure, while groundwater depletion threatens urban supply. Rural areas are also under strain: high-density rural areas face challenges like land loss and water shortages, requiring decentralised planning, technology, and local solutions.
Provinces and regional geography
Administrative units
Pakistan's federal system combines four provinces, the Islamabad Capital Territory (ICT), and two areas that the country administers separately, Gilgit-Baltistan and Azad Jammu and Kashmir. The provinces correspond only loosely to physical regions. Punjab and Sindh contain most of the Indus plain, Khyber Pakhtunkhwa (KP) spans the foothills and northern mountains, and Balochistan covers the arid plateau and southwest. Gilgit-Baltistan and Azad Jammu and Kashmir lie in the mountains. Their constitutional status is bound up with the Kashmir dispute with India, which is treated in the territorial sections of this article.
Population figures for the two separately administered areas are handled differently from the rest. Census data for Azad Kashmir and Gilgit-Baltistan had not yet been approved by the Council of Common Interests when the national totals were reported. The headline total of about 247.5 million includes them, while the provincial figures and the ICT add up to roughly 241.5 million. At the 2023 census, Gilgit-Baltistan was the least populous province-level unit, at 1,709,049 people.
Population, area, and density
Punjab has about 205,344 km² and 127.7 million people, making it the most populous province. Sindh has a 2023 population of about 55.7 million on roughly 140,914 km². Khyber Pakhtunkhwa has about 40.9 million people on 101,741 km², and the ICT covers 906 km² with about 2.4 million residents. Balochistan has about 14.9 million people on 347,190 km². Dividing population by area, as a rough calculation from these census and area figures, gives about 620 people per square kilometre in Punjab, about 400 in KP and Sindh, about 43 in Balochistan, and about 23 in Gilgit-Baltistan.
Balochistan is the clearest case of the gap between territory and people. It covers about 43.6 per cent of the national land area, yet its population is about 6 per cent of the national total. Its arid climate limits farming, and only about 5 per cent of its land is arable. Even so, the provincial government credits agriculture and livestock with roughly 47 per cent of the provincial economy, which shows how much of the economy depends on pastoral and dryland activity. The province's mineral base is significant as well. Balochistan holds coal, copper, gold, and natural gas, which make it important to the country's mining sector.
Economic and climatic contrasts
Climate and economy follow the same broad pattern. Punjab and most of Sindh are hot, with irrigated farming and the bulk of manufacturing concentrated on the Indus plain. Sindh is distinctive for its coastline and its port city. The major cities in the list include Karachi, Lahore, Faisalabad, Rawalpindi, Gujranwala, Multan, Hyderabad, Peshawar, and Quetta. KP combines the hot Peshawar valley with alpine valleys in the north, so its climate and livelihoods change sharply with altitude. Balochistan is arid across most of its area, with cold winters on the high plateau around Quetta.
The merger of the tribal areas into Khyber Pakhtunkhwa
The most significant recent change to the territorial map was the absorption of the Federally Administered Tribal Areas (FATA) into KP. The 25th Amendment received presidential assent on 31 May 2018, and FATA was formally merged with Khyber Pakhtunkhwa after that date. The former agencies and frontier regions were then renamed as districts and subdivisions. The Frontier Crimes Regulation was repealed and replaced by the Rewaj Regulation for Tribal Areas.
Boundary-altering changes need provincial consent. Because Article 239(4) requires amendments affecting geographic boundaries to be approved by the affected province's assembly, the bill had to be passed by the KP assembly with a two-thirds vote. The merger also changed representation. Petitioners argued that the tribal areas lost 12 National Assembly seats and 8 Senate seats. In 2020 the Supreme Court admitted a constitutional petition challenging the amendment for regular hearing. In terms of the territorial map, the merger removed the former tribal agencies as a separate tier and added their mountainous and frontier districts to KP, which now stretches from the Peshawar valley to the Afghan border.
Land use and agricultural geography
Agriculture covers a large share of Pakistan, and water availability, more than soil alone, determines where crops are grown. The FAO puts agricultural land at about 30.5 million hectares, about 47 percent of the national land, and reports that more than 82 percent of the cultivated land is irrigated, and 18 percent is rainfed. Because most fields depend on canals and wells, the irrigation network effectively draws the boundary of intensive farming.
Cropping zones of the plains
Plains agriculture runs on two seasons. The kharif season, sown during the summer monsoon, carries rice, cotton, sugarcane, maize, millet, and sorghum, while the rabi season, sown in the cool months, is led by wheat. In 2022-23 the area sown to wheat rose to 9 million hectares, and sugarcane was cropped on 1.3 million hectares. Each crop sits in a distinct part of the plains. Rice runs in the flooded basins of the Punjab and lower Sindh, while cotton occupies the drier southern Punjab and upper Sindh. Sugarcane is concentrated in Punjab, Sindh, and Khyber Pakhtunkhwa.
The rotation is also set by water supply. In irrigated areas wheat is planted after cotton, rice and sugarcane, whereas in rain fed areas wheat is grown in sequence with maize, sorghum, pearl millet, especially in low-rainfall zones. Irrigation also changes the energy and carbon cost of a crop. A study of the four major crops found that wheat and cotton in Punjab and rice and cotton in Sindh are the most energy-intensive, which links the cropping map to pumping and canal operation.
Mountain agriculture of the north
Cultivation in the northern valleys is confined to narrow floors and terraced slopes, where meltwater from glaciers and side streams is channelled to fields. Terraces allow crops such as wheat, barley, and maize to be grown on steep ground, while orchards of apricots, apples, and walnuts occupy the warmer lower slopes. Above the cultivated belt, higher meadows serve as summer pastures, to which herders move flocks in the warm months, and fodder is stored for the long winter. Settlement and farming here are therefore tied to altitude and to the timing of snowmelt.
Pastoral economy of the arid west
In the arid west and along the desert edges, livestock is the main form of land use. In Balochistan, livestock is dependent on grazing in rangelands, which makes 40 percent of the total landmass in the province. The arable share is small: the province covers about 44 per cent of Pakistan's area but has only 5% arable land. Herding is also seasonal. During winter, the farmers living in central Balochistan migrate with their flocks to lower lands in Sibi and Kachhi plains, moving to warmer ground when highland pasture is scarce. At national level, livestock is contributing approximately 61.9 percent of agriculture value added and 14.0 percent to the national GDP during 2021-22. Other estimates are lower, placing livestock at about 56.3% of the value of agriculture and nearly 11% to the agricultural gross domestic product, so the figures should be read with their year and method in mind.
Interactions between cultivation, settlement, and water
Cultivated land, settlement, and water availability are closely linked. Urban and village growth on the plains tends to take up irrigated land, especially near expanding cities, so the area that can be farmed does not simply follow rainfall or soil. Where canal supply is unreliable, farmers turn to groundwater through tubewells, which raises pumping costs and shifts cropping toward crops with lower water demands. In the mountains, the same pressure appears in a different form: settlement is limited by flat ground and by the reach of meltwater channels, so changes in glacier and snow supply can alter how much terraced land remains productive. In the desert west, the balance is set by rangeland condition and the timing of rain, which determine how many animals the land can carry in a given year.
Transport, infrastructure, and spatial networks
Pakistan's transport network follows its terrain. Most lines run along the Indus plain, which carries the bulk of population and trade, while a few passes and valleys cross the northern mountains. The north-south axes and the links to Afghanistan, Iran and China therefore depend on a small number of corridors, and those corridors are repeatedly exposed to seismic shaking, slope failure and snow closure.
The Karakoram Highway (KKH, designated N-35 in Pakistan) is the country's principal overland route to China. It climbs from Hasan Abdal in Punjab through the Hazara hills, follows the Indus gorge past Besham, Dasu and Chilas, and then runs up the Hunza valley to the Khunjerab Pass, at about 4,700 metres on the border. Total length is usually given as about 1,300 km, but the Pakistani section is reported anywhere from about 800 to 890 km depending on where it is measured from. Construction began in the 1960s, the road was completed in 1979 and it opened to public traffic in 1986. Its steep cuts and river-side sections are vulnerable to rockfall, debris flows and flood damage, so maintenance is a constant task. Other mountain routes, such as those over the Babusar and Lowari passes, link Gilgit-Baltistan and Chitral to the plains, but several of them are closed by snow for part of the year.
Pakistan Railways runs its network on 1,676 mm broad gauge, and the main line from Karachi to Peshawar (Main Line 1) is the backbone of the system. Its length is reported as roughly 1,700 to 1,870 km depending on the measure used, and it has about 173 stations. Its trains carry most of the country's rail passengers and freight, and current operating speeds are low, typically 60 to 115 km/h. The Kotri–Attock line (Main Line 2) provides a second north-south route. It was completed by linking the Sindh and Punjab sections in the early 1970s and was later designated as an alternative to the heavily used Karachi–Peshawar line. A planned upgrade of the Karachi–Lahore section, funded through the China–Pakistan Economic Corridor, aims to halve the journey time, but this is a project rather than an achieved outcome. On the road side, the N-5 national highway is the longest in the country and runs from Karachi to Torkham on the Afghan border, while the N-25 (RCD) highway links Karachi with Hub, Quetta and routes to Afghanistan, Iran and Turkey. Balochistan's rail and road density remains far lower than in Punjab, reflecting its arid terrain and small population.
Karachi is the country's dominant port. It sits on a natural harbour that has been used for centuries, and it has around 32 km of wharves, an entrance channel of about 11 km and an anchorage depth of about 16 metres. Estimates of its share of national shipping vary: one source gives nearly 60 per cent of national shipments, while another puts Karachi and Port Qasim together at roughly 90 per cent of external trade. Both sources agree that the main ports are close to their practical capacity, which restricts further growth on the existing site. Gwadar, on the Makran coast of Balochistan, is a deep-water port built on a rocky outcrop near the entrance to the Persian Gulf. It is roughly 530 to 600 km from Karachi, depending on the route measured, and about 120 km from the Iranian border. Its initial berths can take vessels of about 50,000 deadweight tonnes, and it is estimated to handle around 11 million tonnes of bulk cargo a year. In 2023, however, only a small number of ships called at the port. Its physical constraints include a remote and sparsely populated hinterland, a long distance to the main industrial zones of Punjab and Sindh, limited road and rail connections, and the arid Makran environment, which makes water and power supply difficult.
The energy and water networks are organised around the same terrain. Hydropower from large dams in the north, notably Tarbela and Mangla, feeds into a high-voltage transmission grid that converges on the load centres of Punjab and Karachi, and the lines are routed mainly through the plains and along the valleys to avoid the highest ground. Natural gas from the fields of Balochistan and Sindh moves through pipelines that run to the big cities and industrial zones, which keeps these routes closely tied to the infrastructure corridors on the plains. The irrigation system of canals and barrages follows the gentle gradient of the Indus plain, and its layout is adapted to where water can be diverted and where farmland and towns lie. Hazards are a persistent constraint: floods can wash out embankments, pipelines and rail lines, and earthquakes threaten towers, substations and bridges in the north and west. Where routes must cross unstable ground, the cost of repair and of route redesign rises sharply.
Climate change vulnerability and adaptation
Pakistan's exposure to a warming climate is far larger than its role in causing it. Estimates put its share of world greenhouse gas emissions at about one per cent or less, and its emissions per person at roughly 2 tonnes a year, under half the global average. A State Bank of Pakistan report cited by Dawn puts the country at 1 per cent of total global emissions and ranks its per-capita emissions 147th in the world. The same report notes that emissions per unit of output are relatively high. Vulnerability comes from geography and economic structure. Melting glaciers, monsoon-fed rivers and arid plains combine in one country, and dependence on climate-sensitive sectors such as agriculture, water and natural resources magnifies the effect of any single hazard.
The 2022 floods show how these factors combined. Flooding of the Indus River between June and October 2022 submerged roughly one-third of the country, destroyed or damaged more than two million homes, and killed more than 1,700 people. A study in Nature cites a lower death toll of 1,486 and reports that about 4 million hectares of farmland were inundated (figures vary by source). Two atmospheric rivers drove monsoon rain to nearly double its typical volume, and rainfall in Balochistan and Sindh ran at about 4.5 times normal levels. Snowmelt added a second pulse. The same study found that August streamflow at Sukur Barrage was 170% above the historical average, owing to rain falling on snow and warmer temperatures accelerating melt. Glacial lakes also contributed. The Meteorological Department recorded 16 such incidents in Gilgit-Baltistan in 2022, against five or six in previous years, although it was not yet clear how far the flooding was connected to glacial melt at the time. Weak preparedness made the disaster worse. Pakistan lacked the funds to prepare for flooding and heavy rains and lacked funding for climate resilience efforts. The World Bank put the damage at over $30 billion, with at least $16.5 billion in urgent external support needed.
Adaptation measures have clear geographic limits. Early warning depends on monitoring glacial lakes and monsoon rainfall, but the physical process constrains it: a glacial lake outburst flood releases millions of cubic metres of water and debris within hours, destroying bridges, farms and entire communities downstream, which leaves little time for evacuation in narrow valleys. Water storage is another approach. The Green Climate Fund approved $1.1 billion for projects such as Recharge Pakistan, which enhances water storage capacity. Reservoirs can cut peak flows and store water for dry seasons, but they cannot hold the full volume of a monsoon peak, and sediment gradually reduces their capacity. Flood embankments on the floodplains of the lower river reduce inundation in some places but can shift risk to other areas. Climate-resilient agriculture faces a similar ceiling: crop changes and more efficient irrigation can ease pressure in Sindh and Balochistan, but water supply sets the upper limit. Agriculture also accounted for about 43 per cent of 2015 emissions, so resilience and mitigation measures overlap in this sector.
International finance debates centre on who should pay for losses that cannot be adapted to. Governments agreed at COP27 in 2022 to create a loss and damage fund, with the richest countries paying in. At the Baku board meeting in September 2024 the fund was operationalised, with about $800 million in pledges set to be turned into support. Pakistan chaired the Group of 77 at COP27 and played a central role in creating the fund. In 2025, Pakistan's finance minister told COP30 that bureaucracy in climate funds slowed disbursements and that the Loss and Damage Fund was still being operationalised four years after its creation. Positions differ on eligibility. The G77 and China have argued that all vulnerable states should be able to access the fund, while Pakistan's designation as a middle-income country could, according to one analysis, prevent it from accessing loss and damage finance. Among developed states, several advanced nations, the United States among them, resisted obligatory loss and damage payments at COP26, and opinion has remained generally divided between developed and developing countries for years. Pakistan has also borrowed to rebuild, with around $400 million in loans taken out for reconstruction of homes and infrastructure. Debt-for-climate swaps have been proposed as an alternative means of financing losses. Economic development and emissions targets also interact, as Pakistan needs to grow its economy and raise GDP while lowering emission intensity.
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