| Catchment area | Erosion rate mm/yr | Av. precipitation over the catchment [20] | Prevailing rock cover | Slope catchment area m/km2 | urbanized area %, other land use |
| King Talal | 0.013 | 272 | Limestone, chert, basalt | 0.086 | 25% |
| El Karak | 0.0165 | 273 | Limestone, marlstone | 4.0 | 15% |
| El Arab | 0.031 | 462 | Limestone, chalk | 1.16 | 12% |
| Shueib | 0.046 | 400 | Limestone, marlstone | 4.19 | 15% |
| Al Tannur | 0.055 | 150 | Limestone, chert, phosphate | 0.113 | 2%, heavy quarrying |
| Mujib | 0.078 | 317 | Limestone, marlstone, chert | 0.055 | 2% |
| Wala | 0.177 | 216 | Limestone, chert, combusted limestone | 0.08 | 3%, quarrying |
| El Kafrain | 0.212 | 397 | Limestone, friable sandstone, marlstone | 4.34 | 25% |