GIS application for hydrogeological characterization of dunar systems (Erg Chebbi, Morocco)
DOI:
https://doi.org/10.3989/estgeogr.201418Keywords:
dunar system, hydrogeology, Erg Chebbi, GISAbstract
Hydrogeological studies in remote areas are difficult to tackle and often logistically complicated. However, in some of these areas the exploitation of groundwater resources is essential for the survival of the communities that inhabit them. The dunes of Erg Chebbi configure a free aquifer about 100 km2 in area. With an average annual rainfall of less than 150 mm, Erg Chebbi represents an extremely delicate hydrological system that requires a very well designed exploitation to enable a sustainable development. This paper addresses the hydrogeological characterization of an erg system by means of Geographic Information Systems (GIS) (ArcGis 9.3 y Global Mapper v.12), Digital Elevation Model (DEM) and geological information analysis. Results allowed the characterization the dune system and the setting of a hydrogeological model, consistent with field data. The results are relevant to the management of the groundwater exploitation in the studied system, and highlight the utility of this methodology to the characterization of other areas with similar characteristics.
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