Contribution of SIG to the Study of the vulnerability of the Haouz Marrakech aquifer (Maroc)

The Haouz plain downstream from Marrakesh is characterized by an arid to semi-arid climate, by low and irregular rainfall, and by a great variability of recharge of the water table. The protection of the Haouz Plio-Quaternary aquifer, which is one of the most exploited and important aquifers in the Tensift region, has become a major priority. But the protection of the tablecloth requires first a deep knowledge the origin and different types of pollutants that may affect the quality of this water. There are several methods for assessing groundwater vulnerability. These methods essentially guide the selection of sites for development projects that may have a negative impact on the quality of groundwater resources. Geographic Information Systems are an excellent tool for the development of aquifer vulnerability maps, since they facilitate multi-criteria analyses and updates of the models developed. The mapping of the vulnerability of the Haouz aquifer downstream from Marrakesh has been developed by applying the DRASTIC method under the ArcGis, this map shows that the vulnerability to pollution of this studied region and globally Low to Medium, with the presence of vulnerable areas near the Tensift Oued.

Keywords:

DRASTIC , contamination , Vulnerability