Cartographie de la vulnérabilité /sensibilité à la pollution des eaux de la nappe alluviale du haut Sébaou (w. Tizi Ouzou )

Abstract

At a time when we discover the virtues of the environment, protection of water resources and more specifically the underground appears to be a major objective that managers must incorporate the territory in local policy management and planning.

The characterization of the intrinsic vulnerability of groundwater is an excellent tool; more and more developed and experienced by researchers in hydrogeology. We conducted a study on the alluvial aquifer of Sebaou which provided a tool to help managers of water resources and land use in their decision making. To do this, we used two approaches, the first is the DRASTIC method, the second, DRASTIC improvement, it is to characterize the vulnerability / sensitivity.

Both methods were applied to the alluvial aquifer of Sebaou in Algeria, which covers an area of approximately 1432 km2, flowing through alluvial deposits of Quaternary age . This water plays a role in the socio-economic development of the region, whether the supply with drinking water, agricultural or industrial. The water of high Sebaou driven mainly by surface water and the main tributaries therefore subject to all types of pollution.

The comparison of maps obtained by the two methods shows that the first highlights three hydrogeologic units at medium, high and very high vulnerability, while the second tends to overestimate the vulnerability since we got only one map with only one hydrogeologic unit with very high vulnerability.

At a time when we discover the virtues of the environment, protection of water resources and more specifically the underground appears to be a major objective that managers must incorporate the territory in local policy management and planning.

The characterization of the intrinsic vulnerability of groundwater is an excellent tool; more and more developed and experienced by researchers in hydrogeology. We conducted a study on the alluvial aquifer of Sebaou which provided a tool to help managers of water resources and land use in their decision making. To do this, we used two approaches, the first is the DRASTIC method, the second, DRASTIC improvement, it is to characterize the vulnerability / sensitivity.

Both methods were applied to the alluvial aquifer of Sebaou in Algeria, which covers an area of approximately 1432 km2, flowing through alluvial deposits of Quaternary age . This water plays a role in the socio-economic development of the region, whether the supply with drinking water, agricultural or industrial. The water of high Sebaou driven mainly by surface water and the main tributaries therefore subject to all types of pollution.

The comparison of maps obtained by the two methods shows that the first highlights three hydrogeologic units at medium, high and very high vulnerability, while the second tends to overestimate the vulnerability since we got only one map with only one hydrogeologic unit with very high vulnerability.