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首页> 外文期刊>Journal of King Saud University >Delineation of shallow groundwater potential zones using integrated hydrogeophysical and topographic analyses, western Saudi Arabia
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Delineation of shallow groundwater potential zones using integrated hydrogeophysical and topographic analyses, western Saudi Arabia

机译：使用集成的水力通讯和地形分析描绘浅层地下水潜在区域，沙特阿拉伯西部

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Groundwater potentiality mapping is currently receiving more attention, particularly in arid regions, where natural freshwater resources are limited and scarce and instead costly unconventional methods such as seawater desalination are widely used to satisfy water demands. Water demand in Makkah city is considered a vital task, which receives millions of visitors every year for religious purposes. The present study evaluates the potential zones of groundwater in the southwest Makkah city applying hydrogeophysical modeling approach that integrates geoelectrical resistivity in form of vertical electrical sounding (VES), ground-penetrating radar (GPR), and topographic analyses. VES results indicate five main geoelectric layers: (1) dry wadi-fill deposits with a true resistivity varying from 73 to 650 Ohm.m and average thickness of 3.14?m, (2) partially saturated sands with a resistivity range between 19 and 43 Ohm.m and average thickness of 13?m, (3) water-bearing layer of saturated sands with a resistivity range between 55 and 110 Ohm.m, and average thickness of 52?m, (4) highly fractured diorite rocks with resistivity values ranging from 750 to 1450 Ohm.m and average thickness of 1.5?m, and (5) fresh diorite basement rocks with a resistivity of more than 4000 Ohm.m. Results of GPR profiles support the gained results of the VES technique, and together they are confirmed by the wells data. The integrated results suggest a structural control on the groundwater accumulation and call for a detailed mapping of alluvium-covered faults to provide a high-resolution mapping of groundwater occurrences and ensure environmental sustainability in southwest Makkah city.
机译：地下水潜力测绘目前正在接受更多的关注，特别是在干旱地区，天然淡水资源有限，稀缺，而是昂贵的非传统方法，如海水淡化广泛用于满足水需求。 Makkah City的水需求被认为是一个重要的任务，每年都会获得数百万游客的宗教目的。本研究评估了西南麦加市地下水的潜在地区，施加水力学建模方法，其以垂直电气探测（VES），地面穿透雷达（GPR）和地形分析相结合地电阻率。 VES结果表示五个主要的地质电层：（1）干燥的Wadi-填充沉积物，真正的电阻率从73到650欧姆，平均厚度为3.14？m，（2）在19到43之间的电阻率范围内的部分饱和砂。欧姆，平均厚度为13·m，（3）饱和砂层的饱和砂层，电阻率范围为55至110 ohm，平均厚度为52Ω·m，（4）高度骨折的多透岩岩石，具有电阻率值范围从750到1450欧姆，平均厚度为1.5？m，和（5）新的Diorite地下室岩石，电阻率超过4000欧姆。 GPR配置文件的结果支持VES技术的获得结果，并通过井数据确认它们在一起。综合结果表明对地下水积累的结构控制，并呼吁采集覆盖的故障进行详细绘制，以提供地下水发生的高分辨率绘图，并确保西南市麦卡市的环境可持续性。

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