Cartography of intrinsic aquifer vulnerability to pollution using GOD method: Case study Beni Amir groundwoter,Tadla,Morocco

In recent years,the quality of groundwater has deteriorated in several regions of morocco due to many factors. the main objective of this work is to determine the vulnerability of the water table of the beni amir to any form of pollutant introduced from the surface by applying the god method (groundwater occurrence,overall aquifer class and depth of water table) coupled with a geographic information system (gis). the three parameters (the type of aquifer,lithology of the unsaturated zone and depth to the water table) for this method were calculated and mapped using the functions available on arcgis,which allowed us to obtain vulnerability indices. these have been classified into five classes of vulnerability: very high,high,moderate,low and no vulnerability. the results show that the highest indicators appear in areas of shallow groundwater and in areas where permeability is important. however the least vulnerable areas are located in areas where the permeability is low and the water table is deeper. the elaborate map can be used as a decision support tool for the protection and the reasonable management of groundwater resources in plain of tadla. © 2017,university of mohammed premier oujda morocco.