Geographical coverage
- Abidjan Aquifer
- Amazon River Basin
- Amur Daria River Basin
- Antoine Lake Basin
- Aral Sea Basin
- Artibonite River Basin
- Athabasca River Basin
- Ayeyarwady River Basin
- Bagmati River Basin
- Bang Pakong River Basin
- Bengawan Solo Basin
- Bidasoa River Basin
- Brantas River Basin
- Caspian Sea Basin
- Chao Phraya River Basin
- Chu-Talas River Basin
- Chuy River Basin
- Citarum River Basin
- Colorado River Basin
- Columbia River Basin
- Congo/Zaire River Basin
- Cuenca del río Sava
- Dammam Aquifer
- Danube River Basin
- Davao River Basin
- Dnieper River Basin
- Dniester River Basin
- Dong Nai River Basin
- Douro/Duero River Basin
- Drin River Basin
- Ebro River Basin
- Elbe River Basin
- Franco-Swiss Genevese Aquifer
- Gagas River Basin
- Ganges-Brahmaputra-Meghna River Basin
- Garonne River Basin
- Gila River Basin
- Grand Etang Lake Basin
- Great Artesian Basin (Australia)
- Guadiana River Basin
- Guaraní Aquifer System
- Indus River Basin
- Iullemeden-Irhazer Aquifer System
- Jenisej/Yenisey River Basin
- Jordan River Basin
- Juba Shabelle River Basin
- Kalahari Karoo Aquifer
- Kallang River Basin
- Kinabatangan River Basin
- Kotmale River Basin
- Krishna-Cauvery Basin
- La Plata River Basin
- Lake Baikal Basin
- Lake Chad Basin
- Lake Chao Basin
- Lake Chilwa Basin
- Lake Faguibine Basin
- Lake Laguna Basin
- Lake Prespa Basin
- Lake Puzhehei Basin
- Lake Tanganyika Basin
- Lake Titicaca-Poopo System Basin
- Lake Turkana Basin
- Lake Victoria Basin
- Langat River Basin
- Lerma-Chapala Basin
- Lima River Basin
- Limpopo River Basin
- Llobregat River Basin
- Mackenzie River Basin
- Mara River Basin
- Mekong River Basin
- Mino River Basin
- Mississippi River Basin
- Molasse Basin
- Motueka River Basin
- Murray-Darling River Basin
- Na Kha River Basin
- Nakdong River Basin
- Niger River Basin
- Nile River Basin
- North-Western Sahara Aquifer System
- Nubian Sandstone Aquifer System
- Ob River Basin
- Oder/Odra River Basin
- Ogooue River Basin
- Okavango River Basin
- Onggi River Basin
- Oral/Ural River Basin
- Orange River Basin
- Orontes River Basin
- Pangani River Basin
- Paraná River Basin
- Pearl River Basin
- Pilcomayo River Basin
- Po River Basin
- Prek Kampi River Basin
- Prek Krieng River Basin
- Prek Preah River Basin
- Prek Te River Basin
- Pyanj River Basin
- QaDisi Aquifer
- Red River Basin
- Rhine River Basin
- Rhone River Basin
- Rio Grande (North America) River Basin
- Salween River Basin
- Sana'a Basin
- Sanaga River Basin
- Sekong River Basin
- Senegal River Basin
- Sereng River Basin
- Sesan River Basin
- Sir Daria River Basin
- Songhua River Basin
- Sre Pok River Basin
- St. Johns River Basin (Florida)
- Tagus/Tejo River Basin
- Tama River Basin
- Tana River
- Tanguar Haor Basin
- Tano River Basin
- Tarim River Basin
- Thanlwin River Basin
- Tigris-Euphrates/Shatt al Arab River Basin
- Tisza River Basin
- Toledo River Basin
- Tonle Sap Lake Basins
- Tordera River Basin
- Tsurumi River Basin
- Tula River Basin
- Umatilla River Basin
- Vistula/Wista River Basin
- Volta River Basin
- Yangtze River Basin
- Yarmouk River Basin
- Yarra River Basin
- Yellow River Basin
- Yom River Basin
- Yoshino River Basin
- Zambezi River Basin