Semantic search
- BahuKalat-Rudkhanehye Basin
- Baker Basin
- Bangau Basin
- Bangladesh
- Bann Basin
- Baraka Basin
- Barima Basin
- Barta Basin
- Bei Jiang-Hsi Basin
- Beilun Basin
- Belarus
- Belgium
- Belize
- Belize Basin
- Benin
- Benito-Ntem Basin
- Bermejo River
- Bhutan
- Bia Basin
- Bidasoa Basin
- Binational Autonomous Authority of the Lake Titicaca (ALT)
- Binational Commission for the Development of the Upper Bermejo and Grande de Tarija Rivers
- Binational Master Plan
- Blue Nile
- Bolivia
- Bosnia and Herzegovina
- Bosnia-Herzegovina
- Botswana
- Boundary Convention between the United States of America and Mexico
- Brazil
- Brunei
- Bulgaria
- Burkina Faso
- Burund
- Burundi
- Buzi Basin
- Ca (Song-Koi) Basin
- California (U.S.)
- California Groundwater Sustainability Agency
- Cambodia (Kampuchea)
- Cameroon
- Canada
- Canadian Columbia River Inter-Tribal Fisheries Commission
- Candelaria Basin
- Castletown Basin
- Catalonia
- Catatumbo Basin
- Cavally Basin
- Central African Republic
- Central Commission for the Navigation of the Rhine