| size typology based on catchment area: | |
| small: < 100 km², medium: 100 - 1000 km², large: 1000 - 10000 km², very large: 10000 - 100000 km² | |
| exact catchment size data available: yes | |
| depth typology based on mean depth: | |
| < 3 m, 3 - 15 m, > 15 m | |
| exact depth data available: no | |
| size typology based on surfcae area: | |
| 0.5 to 1 km², 1 to 10 km², 10 to 100 km², > 100 km² | |
| exact surface area data available: yes | |