Nepal's rivers arise in the high Himalaya and descend through hills and plains to join larger international waterways. They form several major drainage systems that ultimately feed the Ganges in India or flow into adjacent lowlands. This article summarizes the principal rivers and their better-known tributaries; a more detailed directory can be found here: comprehensive list of rivers.

Overview and characteristics

Rivers in Nepal are typically steep, glacier- and snow-fed in upper reaches and seasonal in the middle and lower regions. They carve deep gorges and fertile alluvial plains and are characterized by high sediment loads, rapid seasonal discharge changes, and significant hydropower potential. Many carry religious and cultural importance in local communities.

Major basins and notable rivers

The country's waterways are commonly grouped by the large transboundary river systems. Tributaries are indented under each main river to show hierarchy; for an explanation of how tributaries are listed see tributaries guide.

  • Koshi (Saptakoshi) Basin
    • Sun Koshi
    • Arun
    • Tamor
    • Dudh Koshi
    • Indrawati
  • Gandaki (Narayani) Basin
    • Kali Gandaki (Kobang)
    • Trishuli
    • Marsyangdi
    • Seti (Seti Gandaki)
    • Myagdi
  • Karnali Basin
    • Seti (Karnali's upper tributary)
    • Bheri (Thuli Bheri, Sani Bheri)
    • Humla Karnali
  • Mahakali (Kali/Sharda)
  • Bagmati Basin
    • Bagmati (flows by Kathmandu)
    • Roshi
    • Manohara
  • Other important rivers
    • Rapti (East and West Rapti systems)
    • Babai
    • Tamau (Tinau)
    • Kankai
    • Mechi and Koshi's eastern feeders

Uses and importance

These rivers support irrigation, fisheries, household water, and a growing hydropower sector that supplies both domestic electricity and export potential. River valleys provide transportation corridors, agricultural land, and ecologically rich floodplain habitats. Conversely, seasonal floods and landslides pose recurring hazards to settlements and infrastructure.

History, management and notable facts

Historically, river corridors shaped travel, trade and settlement patterns across Nepal. Modern river management balances hydropower development, flood control, and ecosystem conservation. Many rivers change names across regions and borders; some tributaries share names (for example, more than one stream called "Seti"), so mapping and local knowledge are important when identifying specific channels.