Fig. 14

Drainage basins of Wadi Sudr is deduced through using DEM-30 (a) showing the 5^th order drainage pattern with the location of the fortress at the basin division (b). The upstream of the 5^th order tertiary basin of a DEM 12.5 (c). The satellite images shows the locations of the barrages (d) in a flat-lying land “pink arrows”