Cartographie de la vulnérabilité intrinsèque par la méthode DRASTIC couplée de Système d’Information Géographiqu (SIG). Cas de la plaine da Remila - khenchela
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Date
2018
Journal Title
Journal ISSN
Volume Title
Publisher
Université Abbes Laghrour -Khenchela-
Abstract
Abstract
The relative scarcity of water resources in the Remila plain (north of Khenchela),
their fragility and unequal distribution create a major risk of scarcity which, despite
all attempts to increase supply, seems inevitable. For example, population growth and
the development of agglomerations, industrial units and cultivated lands have resulted
in a deterioration of the quality of groundwater. This study is an approach to help
protect and prevent the groundwater pollution of the Rémila aquifer and to map areas
vulnerable to pollution. The application of the DRASTIC method in a SIG
environment allowed this evaluation.
The use of geographic information systems (SIG) increases the speed and
accuracy of mapping. The results show that half of the study area is moderately
vulnerable. The highest DRASTIC indices are located mainly in the center of the
plain, this is explained by the nature of the relative permeable lithological formations
in this zone. The zones with very weak and weak vulnerability occupy the east and
west shores of the plain, due to silty clay cover forming a natural protection of the
water.