Sidi Bel Abbes plain, in Western Algeria, covers an area of 813 km² and holds an important groundwater reservoir, providing the region with a large water potential. It displays characteristics of a peri-urban aquifer, with a large agricultural sector. The climatic variations that affected this region, the development of industrial and agricultural activities along with the over-exploitation of the groundwater resource negatively impact the aquifer's hydrodynamic balance. This work is structured around a multiapproach process based mainly on geophysical data to determine the reservoir bathymetry, rainfall data, humidity data using the standardized precipitation index (SPI), piezometric maps, hydrodynamic data, and groundwater extraction rate. Results revealed a significant decrease in humidity values over time. This negatively influences the water potential of the alluvial aquifer and induces a lateral recharge from adjacent aquifers (overfilling). Indeed, the rainfall contribution to the recharge appears low compared to that of the surrounding aquifers. However, total annual rainfall above 500 mm/year may reduce the input of the adjacent aquifers. Besides, our study indicates a well-defined hydrodynamic pattern in the alluvial aquifer, due to the bowl-shaped bedrock of the aquifer and the excessive overexploitation, especially downstream (the region of Sidi Bel Abbes). Thus, this aquifer adapted to such exploitation, through continuous and systematic recharge of drainage flows by the upstream groundwater (regions characterized by a wall uplift). The aquifer’s pluviometric dependence occurs clearly in its south-western part. A 50% humidity value implies a 0–10 m increase in the water table.

西阿尔及利亚的西迪贝尔阿贝斯平原，面积813 km ²并拥有重要的地下水库，为该地区提供了巨大的水潜力。它显示了具有大量农业部门的城郊含水层的特征。影响该地区的气候变化，工农业活动的发展以及地下水资源的过度开发对含水层的水动力平衡产生了负面影响。这项工作围绕主要基于地球物理数据来确定水库测深，降雨数据，使用标准化降水指数（SPI）的湿度数据，测压图，水动力数据和地下水提取率的多途径过程进行。结果显示湿度值随时间显着下降。这会对冲积含水层的水势产生负面影响，并引起相邻含水层的横向补给（过量填充）。的确，与周围含水层相比，降雨对补给的贡献似乎较低。但是，每年超过500毫米/年的总降雨量可能会减少相邻含水层的投入。此外，我们的研究表明，由于蓄水层呈碗状的基岩和过度的过度开采，特别是在下游（西迪贝阿贝斯地区），冲积含水层的水动力模式是明确的。因此，该蓄水层通过上游地下水（以墙体隆起为特征的区域）对排水流进行连续而系统的补给，从而适应了这种开采。含水层的水分计量依赖性很明显地发生在其西南部。