Abstract
We studied the vulnerability and risks of pollution of the alluvial aquifer of Tebessa-Morsott that ranks amongst the major groundwater reservoirs of the region. The method used to asses groundwater vulnerability was the DRASTIC method, based on seven parameters that affect and control the groundwater flow: Depth to groundwater, Impact of the unsaturated zone, net recharge, aquifer media, hydraulic conductivity, soil media, topography. These parameters were obtained from data field, synthetic maps relative to the area considered and then identified within each cell after discretization of the studied area in regular square cells. For each cell, DRASTIC rating for each parameter was multiplied by the DRASTIC weight for that cell and summed to determine the DRASTIC index. A detailed vulnerability map was obtained, showing four classes of potential pollution of the aquifer. Check analysis of the quality of groundwater within these zones are carried out in order to assess the risks of contamination. Pollution by nitrates occurs especially in the wells of low depth, but also in certain drillings for drinking water, whereas bacteriological pollution is observed only in the domestic wells.
Highlights
INTRODUCTIONConsidering the strategic role of the alluvial aquifer of Tebessa-Morsott in the economic and social development of the area, it's necessary to protect the resources (sources, well, drillings, etc...) from any external pollution
Considering the strategic role of the alluvial aquifer of Tebessa-Morsott in the economic and social development of the area, it's necessary to protect the resources from any external pollution.Over recent years, this aquifer has been threatened by numerous pollution sources that have been increased due to lack of environmental protection measures for water resources, in particular wasted domestic and industry water which poured in the aquifer without any previous treatment
In a worry to protect the underground water sources, we present this study which treats vulnerability and risk of pollution of the alluvial aquifer of Tebessa-Morsott using the DRASTIC method
Summary
Considering the strategic role of the alluvial aquifer of Tebessa-Morsott in the economic and social development of the area, it's necessary to protect the resources (sources, well, drillings, etc...) from any external pollution. Over recent years, this aquifer has been threatened by numerous pollution sources that have been increased due to lack of environmental protection measures for water resources, in particular wasted domestic and industry water which poured in the aquifer without any previous treatment. The ground is composed by alluvia poor in organic matter so that an intensive use of pesticides to maintain the productivity of the ground is needed In front of this situation which evolves every day, it is necessary, and to take all measurements those guaranties a good quality of water for the future needs.
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