J. Bio. Env. Sci.10(4), 81-89, April 2017
A DRASTIC-model method based on a geographic information system (GIS) was used to study groundwater vulnerability in coastal plain of Collo in North east Algeria. The aquifer is the main source of water supply in the area and is showing signs of contamination due to the existence of pollution sources. The main objective of this paper is to find out the groundwater vulnerable zones. DRASTIC model is based on the seven data layers that provide the input to the modeling. It corresponds to the initials of seven layers i.e. Depth of water, net Recharge, Aquifer media, Soil media, Topography, Impact of vadose zone and hydraulic Conductivity. The results show that the central and northern part of the study area is classified as a high and very highly vulnerable zone which recorded higher nitrate values. The southern and western part of study area is classifed as a medium and low vulnerable zone. The study suggests that this model can be an effective tool for local authorities who are responsible for managing groundwater resources.
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