阿尔及利亚东南部Chetma-Biskra干旱环境复杂终端含水层水文地质特征地电调查

IF 0.8 Q4 WATER RESOURCES
Fares Kessasra, N. Mezerreg, Djamel Eddine Dehibi, Lamine Djaret, Asma Bouhchicha, Mohamed Mesbah
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引用次数: 0

摘要

Biskra(阿尔及利亚)作为一个过渡水文地质区,在复杂终端等深埋含水层中拥有大量地下水资源。由于对饮用水供应和灌溉的需求不断增加,加上补给不足,该干旱地区面临着严重的缺水问题,因此需要对地下水进行调查。我们使用了一种综合方法,包括与Chetma地区地质和水文地质背景相关的地球物理调查。研究结果突出了具有显著水文地质特征的深层构造形态。事实上,已经确定了两个名为Droh的耐蚀石灰岩背斜,对应于一个测压圆顶和一个充满导电沉积材料的向斜。马斯特里赫特组由裂缝灰岩组成,厚度约200 ~ 350 m,与下始新统泥灰岩和灰岩形成复杂的含水层。在深度超过400米的地方,捕获马斯特里赫特石灰岩的井眼可提供25至90升/秒的高产量。此外,在300米深度处,地下水产量平均为40升/秒。相比之下,粘土和泥质含量高的同形几何结构的地下水产量较低。我们确认了裂缝性含水层的存在,这可能构成潜在的地下水生产区。这项研究为2030年加强家庭和灌溉用途的地下水抽取提供了新的见解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Hydrogeological characterization of the Complex Terminal aquifer using geoelectrical investigation in the arid environment of Chetma-Biskra (South-East of Algeria)
As a transition hydrogeological area, Biskra (Algeria) holds large groundwater resources in deeply buried aquifers such as the Complex Terminal. Due to a growing demand of drinking water supply and irrigation combined to low recharge, this arid region is facing an acute shortage of water and hence, the need for groundwater investigation. We used an integrated approach including geophysical investigation correlated to the geological and hydrogeological context in the Chetma area. The results highlight a deep structural form with significant hydrogeological features. In fact, two resistant limestone anticlines called Droh corresponding to a piezometric dome and a syncline filled with conductive deposit materials were identified. The Maastrichtian formation, consisting of fractured limestone, about 200 to 350 m thick, together with Lower Eocene marl limestone and limestone form a complex aquifer. At more than 400 m depth, boreholes capturing Maastrichtian limestone offer a high yield ranging from 25 to 90 L/s. Moreover, groundwater yield provides an average of 40 L/s at 300 m of depth. In contrast, synform geometries with high clay and marl content offer a weak groundwater yield. We confirmed the occurence of fractured aquifers which could constitute potentially groundwater production zones. This study provides new insights to enhance groundwater pumping for domestic and irrigation purposes for 2030.
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来源期刊
CiteScore
1.80
自引率
50.00%
发文量
36
审稿时长
8 weeks
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