Remote sensing, and (GIS) approach, for morphometric assessment and sub‑watershed prioritization according to soil erosion and groundwater potential in an endorheic semi‑arid area of Algeria

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Arabian Journal of Geosciences
The application of remote sensing (RS), and geographical information system (GIS), has emerged as one of the most useful methods for the assessment of drainage assessment and sub-watershed prioritization for soil erosion and groundwater potential of watersheds. The present study is focused on morphometric characterization and prioritization of Constantine’s highland catchment, an endorheic semi-arid basin situated in the east of Algeria. It is subdivided into seven sub-catchments. Using digital elevation model (DEM) and Arc GIS tools showed that all of the sub-catchments except the Gareat El Tarf sub-watershed (07–07) had a good permeability, high iniltration, and high groundwater potential, as the geological structure controls the drainage. Yet, drainage density varies from 0.28 km/km 2 for sub-watershed of Chott Beida (07–01) to 0.41 km/ km 2 for the Gareat El Tarf (07–07) sub-watershed. After prioritization of the sub-watershed for soils and groundwater potential, we conclude that a large part of the sub-catchments in the Constantine’s highlands showed high erosive levels of soil and a low groundwater potential.