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Geophysical Exploration of Shallow Groundwater Aquifers in Arid Regions: A Case Study of Siwa Oasis, Egypt
Natural Resources Research ( IF 4.8 ) Pub Date : 2021-07-02 , DOI: 10.1007/s11053-021-09897-3
M. M. Gobashy 1 , A. M. Metwally 1 , K. S. Soliman 1 , M. Abdelazeem 2 , A. Abdelhalim 3
Affiliation  

Geophysical and geological studies play a fundamental role in the strategic and sustainable utilization of natural resources, especially that of fossil groundwater, in arid regions. The geophysical exploration of shallow groundwater aquifers is common in arid regions. In this work, a feasibility study of future development plans in the Siwa Oasis, Egypt, was carried out. A land electric resistivity survey was conducted, and approximately 14 vertical electric soundings were measured covering the Siwa Oasis, northwestern desert, Egypt. A detailed surface geology study was also conducted to study the underground water aquifer. Digital filters were applied to the reduced to pole-available magnetic data covering the area. The normalized source strength transformation and tilt depth were calculated and applied to delineate the possible structures that may control the shallow and deep aquifers in the area. The integrated interpretation showed the presence of four main geoelectric layers forming the shallow section of the Siwa Oasis down to 220 m. These layers varied in their resistivity and rock constituents from very low (0.2 Ω m) to very high (6200 Ω m) values. The calculated hydraulic parameters showed that the uppermost central area and the eastern area were the most promising areas for the required water development. Finally, based on the integrated interpretation and the estimated shallow aquifer potentiality, a land use map for the Siwa Oasis was produced to assist future strategic development of the region.



中文翻译:

干旱地区浅层地下水含水层地球物理勘探:以埃及锡瓦绿洲为例

地球物理和地质研究在干旱地区自然资源,特别是化石地下水的战略和可持续利用方面发挥着重要作用。浅层地下水含水层的地球物理勘探在干旱地区很常见。在这项工作中,对埃及锡瓦绿洲的未来发展计划进行了可行性研究。进行了陆地电阻率调查,并测量了大约 14 次垂直电测深,覆盖了埃及西北部沙漠的锡瓦绿洲。还进行了详细的地表地质研究,以研究地下水含水层。数字滤波器被应用于覆盖该区域的减少到极点可用的磁数据。计算并应用归一化源强度变换和倾斜深度来描绘可能控制该地区浅层和深层含水层的可能结构。综合解释表明存在四个主要地电层,形成了深达 220 m 的锡瓦绿洲浅部。这些层的电阻率和岩石成分从非常低 (0.2 Ω m) 到非常高 (6200 Ω m) 值不等。计算的水力参数表明,最上层的中部地区和东部地区是最有希望开发水的地区。最后,根据综合解释和估计的浅层含水层潜力,制作了锡瓦绿洲的土地利用图,以协助该地区未来的战略发展。综合解释表明存在四个主要地电层,形成了深达 220 m 的锡瓦绿洲浅部。这些层的电阻率和岩石成分从非常低 (0.2 Ω m) 到非常高 (6200 Ω m) 值不等。计算的水力参数表明,最上层的中部地区和东部地区是最有希望开发水的地区。最后,根据综合解释和估计的浅层含水层潜力,制作了锡瓦绿洲的土地利用图,以协助该地区未来的战略发展。综合解释表明存在四个主要地电层,形成了深达 220 m 的锡瓦绿洲浅部。这些层的电阻率和岩石成分从非常低 (0.2 Ω m) 到非常高 (6200 Ω m) 值不等。计算的水力参数表明,最上层的中部地区和东部地区是最有希望开发水的地区。最后,根据综合解释和估计的浅层含水层潜力,制作了锡瓦绿洲的土地利用图,以协助该地区未来的战略发展。2 Ω m) 到非常高的 (6200 Ω m) 值。计算的水力参数表明,最上层的中部地区和东部地区是最有希望开发水的地区。最后,根据综合解释和估计的浅层含水层潜力,制作了锡瓦绿洲的土地利用图,以协助该地区未来的战略发展。2 Ω m) 到非常高的 (6200 Ω m) 值。计算的水力参数表明,最上层的中部地区和东部地区是最有希望开发水的地区。最后,根据综合解释和估计的浅层含水层潜力,制作了锡瓦绿洲的土地利用图,以协助该地区未来的战略发展。

更新日期:2021-07-02
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