Geographia Technica, No. 1/2010, pp. 17 - 24

A NEW GRAPHIC FOR THE DETERMINATION OF THE VULNERABILITY AND RISK OF GROUNDWATER POLLUTION

 N. Khérici, H. Khérici-Bousnoubra, E.F. Derradji, A.K. Rouabhia, C. Fehdi

ABSTRACT: Through the world, methods of vulnerability estimation and risk of groundwater pollution are very numerous. They use the parametric systems with numerical quotation, the cartographic superposition or the analytical methods which are based on the equations. The analysis of the vulnerability and the risk of groundwater pollution presented in this paper were carried out based on the combination of two criteria: the index of self-purification and the index of contamination. It is summarized with a new graphic method, in the form of abacus, simple and rapid of use. It is an abacus made up of two diagrams of triangular form connected to a third of rectangular form identifying the degree of vulnerability and the risk of underground pollution waters. On one of the triangles are represented the index of self-purification of the soil and the thickness of the unsaturated zone and on the other triangle are represented the indices of organic and mineral contamination of groundwater.
Keywords: vulnerability assessment, groundwater pollution risk, index of self-purification, index of contamination.

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