| Sites | Perimeter (P km) | Area (A km2) | Gravelus index (Kg) | Rectangle length (Leq km) | Maximum elevation (m) | Minimum elevation (m) | Average slope (%) | Difference in height elevation (Ds m) |
| Nkong’s watershed | 73.21 | 166.7 | 1.60 | 31.27 | 1898 | 929 | 0.03 | 271.1 |
| Ngam’s watershed | 73.98 | 159.6 | 1.64 | 32.00 | 1621 | 900 | 0.11 | 157.9 |