Analyzing the geomorphometric characteristics of semiarid urban watersheds based on an integrated GIS-based approach

摘要: Water is a vital resource for life and the nucleus of everything on globe. Nowadays, water becoming scarce resource, which menace to humankind its future. Due disparity in global distribution, regions are suffering from acute inability while others have surplus. resources be prudently managed as they beneficial humanity. This study used shuttle radar topography mission digital elevation model data perform detailed morphometric analysis Riyadh urban area. Generally, analyzing parameters involves linear, areal, relief aspects; therefore, paper covered these parameters. The results revealed that metropolitan area delineated into 40 watersheds has eighth-order streams with total 8500 km2; although city 6570 km2 according administrative division. Consistent statistical analysis, stream order inversely related number coefficient determination (R2) being 99%. Meanwhile, cumulative length directly proportional same R2 value. Moreover, high bifurcation ratio most refers less permeable rocks steeper slope. Consequently, conforms drainage density (1.57 km/km2) confirms impermeability subsurface material mountainous relief. hypsometric integral 38%, erosion value 62%. Both values indicate basin at mature stage.