Semantic search
- Chiriqui Basin
- Choluteca Basin
- Chuy Basin
- Coastal Aquifer (Israel, Palestine)
- Coatan Achute Basin
- Coco (Segovia) Basin
- Colorado Basin
- Colorado River
- Colorado-Corredores Basin
- Columbia Basin
- Columbia River Basin
- Comau Basin
- Congo Basin
- Conventillos Basin
- Corubal Basin
- Coruh Basin
- Courantyne (Corantijn) Basin
- Cross Basin
- Cuareim River
- Cullen Basin