Rivers and Lakes of Pakistan: The Indus System and Beyond

Pakistan's water geography is dominated by the Indus Basin—one of the world's great river systems—supplemented by significant natural and artificial lakes.

The Indus River System

• Indus River: 3,180 km total; Tibetan source (Senge Khabab), through Ladakh, Gilgit-Baltistan, Khyber Pakhtunkhwa, Punjab, Sindh → Arabian Sea. Lifeline: 90% of Pakistan's agriculture, major hydropower (Tarbela, Dasu, Diamer-Bhasha planned).
• Jhelum: Kashmir source → Mangla Dam (1,150 MW) → Punjab plains → Chenab. Vital for Kashmir/Punjab irrigation.
• Chenab: Himachal source → Punjab → merges Jhelum → Sutlej → Panjnad → Indus. Major hydropower (multiple dams).
• Ravi: Himachal → India/Pakistan border → Chenab. Disputed waters (Indus Waters Treaty).
• Sutlej: Tibetan (Langqên Zangbo) → Himachal → Punjab → Chenab. Bhakra Dam (India) regulates flow.

Indus Waters Treaty (1960): India: Ravi, Beas, Sutlej. Pakistan: Indus, Jhelum, Chenab. World Bank brokered. Survived wars; now stressed by climate/demand.

Major Lakes & Reservoirs

• Lake Manchar (Sindh): Largest natural freshwater lake (250 km² variable). Indus-fed. Fisheries, migratory birds, pollution/salinity threats.
• Keenjhar/Kalri Lake (Thatta): Karachi's water supply. Ramsar site.
• Haleji Lake: Wildlife sanctuary, waterfowl haven.
• Tarbela Reservoir (KP): World's largest earth-fill dam (1976). 13.7 km³ capacity. 4,888 MW. Sedimentation reducing life.
• Mangla Reservoir (AJK): 7.4 km³. 1,150 MW. Raised 2011.
• Khanpur Dam (KP): Islamabad/Rawalpindi water supply.
• Rawal Lake (Islamabad): Capital's reservoir.
• Attabad Lake (Gilgit-Baltistan): 2010 landslide dam. Tourism boom.
• Satpara, Sheosar, Rush, Kachura (GB): High-altitude glacial lakes.

Challenges

Glacial melt acceleration, monsoon variability, groundwater overdraft, sedimentation, pollution, transboundary tension, institutional fragmentation. Water scarcity looms: <1,000 m³/capita/yr (stress threshold).

Pakistan's rivers and lakes aren't resources—they're the country's existential infrastructure.