GIS contribution to the mapping of the vulnerability to pollution of the Haouz aquifer downstream from Marrakech, according to the DRASTIC method

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 latter is one of the most exploited and important tablecloths of the Tensift region, has become a major priority. However, the protection of this water table requires first a deep knowledge of the origin and the different types of pollutants that can affect the quality of this water. There are several methods for assessing groundwater vulnerability. The Geographical Information Systems are powerful tool par excellence for drawing up the vulnerability map of the aquifers studied. The main objective of this study is to develop a vulnerability map of the Haouz aquifer in the downstream part of the city of Marrakech, exploiting the functionalities offered by the GIS (ArcGIS) and based on the DRASTIC method. The obtained map shows that the vulnerability to pollution of this studied region is generally low to medium, with the presence of vulnerable areas in the Tensift Oued.

Keywords:

GIS , DRASTIC , Pollution , Vulnerability , Haouz Water Table