Investigating the groundwater resources of weathered bedrock using an integrated geophysical approach
文献类型：期刊论文
| 作者 | Hasan, Muhammad1,2,3; Shang, Yanjun1,2,3 |
| 刊名 | ENVIRONMENTAL EARTH SCIENCES
 |
| 出版日期 | 2023-05-01 |
| 卷号 | 82期号:9页码:23 |
| ISSN号 | 1866-6280 |
| 关键词 | Electrical resistivity tomography (ERT) Weathered rock Fractures Self-potential Magnetic method Induced polarization |
| DOI | 10.1007/s12665-023-10892-5 |
| 英文摘要 | Groundwater occurs within fractures of crystalline hard-rock. Mostly, these fractures are covered by weathered rocks; therefore, delineation of their spatial position is a challenge task. Geophysical methods are widely used to obtain subsurface geological information in the weathered terrains. However, use of single geophysical method may be ambiguous to reliably assess the highly heterogeneous crystalline hard-rock. As part of an ongoing study to choose the most suitable methods towards this end, an incorporated study of electrical resistivity tomography (ERT), magnetic, vertical electrical sounding (VES), self-potential (SP), and induced polarization (IP) coupled with limited pumping/borehole tests was performed to assess the distinct geologic layers, to trace the main faults/fractures, to make a clear distinction between water and clay content, to identify groundwater flow, and to estimate groundwater yield of the fractured/weathered rock. ERT data were collected along four geophysical profiles using ABEM LUND Imaging System for 358 electrodes with 5 m electrode spacing. Magnetic survey along the same ERT profiles was performed using two G-856 proton precession magnetometers with 0.1 nT sensitivity to acquire 358 measurements with 5 m station interval. The Joint Profile Method JPM (ER-IP-SP) was performed for 87 electrodes using WDJD-4 with 10 m electrode spacing along two profiles. A two-layered subsurface model of weathered and unweathered rock was obtained by the incorporation of upfront boreholes with subsurface resistivity and magnetic susceptibility. Integration of ERT and magnetic models with JPM curves revealed several localized fractures/faults. Hydraulic properties specifically transmissivity and hydraulic conductivity obtained from geoelectrical resistivity data were used to estimate aquifer potential enclosed within the fractured/weathered rock. Integrated geophysical results are well correlated with borehole data. This study provides the best alternative of the costly traditional methods for more reliable evaluation of groundwater reserves in the heterogeneous settings. |
| WOS关键词 | LEAST-SQUARES INVERSION ; AQUIFER ; ROCK |
| WOS研究方向 | Environmental Sciences & Ecology ; Geology ; Water Resources |
| 语种 | 英语 |
| 出版者 | SPRINGER |
| WOS记录号 | WOS:000978695800007 |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/110884]  |
| 专题 | 地质与地球物理研究所_中国科学院页岩气与地质工程重点实验室 |
| 通讯作者 | Hasan, Muhammad |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hasan, Muhammad,Shang, Yanjun. Investigating the groundwater resources of weathered bedrock using an integrated geophysical approach[J]. ENVIRONMENTAL EARTH SCIENCES,2023,82(9):23. |
| APA | Hasan, Muhammad,&Shang, Yanjun.(2023).Investigating the groundwater resources of weathered bedrock using an integrated geophysical approach.ENVIRONMENTAL EARTH SCIENCES,82(9),23. |
| MLA | Hasan, Muhammad,et al."Investigating the groundwater resources of weathered bedrock using an integrated geophysical approach".ENVIRONMENTAL EARTH SCIENCES 82.9(2023):23. |
入库方式： OAI收割
来源：地质与地球物理研究所
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