Abstract
The water resources of the Nadhour-Sisseb-El Alem Basin in Tunisia exhibit semi-arid and arid climatic conditions. This induces an excessive pumping of groundwater, which creates drops in water level ranging about 1-2 m/a. Indeed, these unfavorable conditions require interventions to rationalize integrated management in decision making. The aim of this study is to determine a water recharge index (WRI), delineate the potential groundwater recharge area and estimate the potential groundwater recharge rate based on the integration of statistical models resulted from remote sensing imagery, GIS digital data (e.g., lithology, soil, runoff), measured artificial recharge data, fuzzy set theory and multi-criteria decision making (MCDM) using the analytical hierarchy process (AHP). Eight factors affecting potential groundwater recharge were determined, namely lithology, soil, slope, topography, land cover/use, runoff, drainage and lineaments. The WRI is between 1.2 and 3.1, which is classified into five classes as poor, weak, moderate, good and very good sites of potential groundwater recharge area. The very good and good classes occupied respectively 27％ and 44％ of the study area. The potential groundwater recharge rate was 43％ of total precipitation. According to the results of the study, river beds are favorable sites for groundwater recharge.
基金项目
This research work,performed in the Center of Research and Water Technologies(CERTE)
Borj Cedria Technological Pole,was a part of the project"Characterization and evaluation of hydrogeological reservoirs in the Sa(CRDAof the Kairouan)
Borj Cedria Technological Pole,was a part of the project"Characterization and evaluation of hydrogeological reservoirs in the Sa(Zaghouan Governorates are acknowledged for providing data)
国家科技期刊平台
NSTL
万方数据