| Characteristic of watershed | Mfomchout | Ngâ | Lompit |
| Latitude | 5˚43'45" and 5˚44'58" | 5˚43'45" and 5˚44'40" | 5˚43'42" and 5˚44'40" |
| Longitude | 10˚52'25" and 10˚53'00" | 10˚53'00" and 10˚53'30" | 10˚53'30" and 10˚54'10" |
| Surface area (m2) | 1.387 | 0.942 | 1.16 |
| Perimeter (m) | 5.315 | 3.974 | 5.578 |
| Coefficient of Gravelius | 1.2 | 1.15 | 1.45 |
| Form of the basin | Rectangle | Rectangle | rectangle |
| Equivalent length (m) | 1.97 | 1.24 | 2.304 |
| Equivalent width (m) | 0.703 | 0.759 | 0.504 |
| Minimal altitude (m) | 1075 | 1033.5 | 1033.5 |
| Maximal altitude (m) | 1231.5 | 1225 | 1225 |
| Median altitude (m) | 1112.5 | 1137.5 | 1137.5 |
| Order of the river | 4 | 4 | 4 |
| Geology | Basalt | Basalt | Basalt |
| Type of residential building | Modern | Spontaneous habitats | Mixed habitat |
| Type of cleaning up | Modern | Traditional | Mixed |