Fast Recognition on Shallow Groundwater and Anomaly Analysis Using Frequency Selection Sounding Method
The validity of the frequency selection method (FSM) in shallow (<150 m) groundwater exploration was illustrated by practical applications, and the relationship between potential electrode spacing <i>MN</i> and groundwater depth in FSM sounding method was analyzed and preliminary theo...
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MDPI AG
2022-12-01
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| Series: | Water |
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| Online Access: | https://www.mdpi.com/2073-4441/15/1/96 |
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| author | Lu Yulong Yang Tianchun Abdollah Taheri Tizro Liu Yang |
| author_facet | Lu Yulong Yang Tianchun Abdollah Taheri Tizro Liu Yang |
| author_sort | Lu Yulong |
| collection | DOAJ |
| description | The validity of the frequency selection method (FSM) in shallow (<150 m) groundwater exploration was illustrated by practical applications, and the relationship between potential electrode spacing <i>MN</i> and groundwater depth in FSM sounding method was analyzed and preliminary theoretical research was carried out by a simple geologic-geophysical model of sphere. Firstly, under the combined action of horizontal alternating electric field and alternating magnetic field, a simplified geophysical model of low resistivity conductive sphere in homogeneous half space was established, and the forward calculation was performed on the FSM sounding curve. Then, the water yield of 131 wells in the application of FSM in the Rural Drinking Water Safety Project of 12th Five-Year Plan in Guangxi Province was counted. In addition, detailed tabular statistical analysis was carried out on the drilling results of 98 drilling wells, and the relationship between potential electrode spacing <i>MN</i> at abnormal sounding curve and actual drilling water depth was compared and studied. Theoretical analysis and practical application show that FSM has obvious effectiveness in shallow groundwater exploration, and it is an effective method to determine shallow groundwater well locations in the future. The cause of FSM anomaly is the comprehensive effect of the natural 3D alternating electromagnetic signal underground. At the same time, the practical statistics show that there is 1:1 approximation between the size of potential electrode spacing <i>MN</i> at the anomaly curve of the frequency selection method and the actual drilling water depth, which verifies the correctness of the theoretical simulation results. FSM could be widely used in the shallow groundwater exploration in the future, and it is an effective, non-destructive, fast, and low-cost geophysical method. |
| first_indexed | 2024-03-09T09:38:08Z |
| format | Article |
| id | doaj.art-c028c7c32ecf480688f47ec021590d1e |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-09T09:38:08Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Water |
| spelling | doaj.art-c028c7c32ecf480688f47ec021590d1e2023-12-02T01:14:14ZengMDPI AGWater2073-44412022-12-011519610.3390/w15010096Fast Recognition on Shallow Groundwater and Anomaly Analysis Using Frequency Selection Sounding MethodLu Yulong0Yang Tianchun1Abdollah Taheri Tizro2Liu Yang3School of Earth Sciences and Spatial Information Engineering, Hunan University of Science and Technology, Xiangtan 411201, ChinaSchool of Earth Sciences and Spatial Information Engineering, Hunan University of Science and Technology, Xiangtan 411201, ChinaDepartment of Water Engineering, College of Agriculture, Bu-Ali Sina University, Hamedan 65174, IranSchool of Earth Sciences and Spatial Information Engineering, Hunan University of Science and Technology, Xiangtan 411201, ChinaThe validity of the frequency selection method (FSM) in shallow (<150 m) groundwater exploration was illustrated by practical applications, and the relationship between potential electrode spacing <i>MN</i> and groundwater depth in FSM sounding method was analyzed and preliminary theoretical research was carried out by a simple geologic-geophysical model of sphere. Firstly, under the combined action of horizontal alternating electric field and alternating magnetic field, a simplified geophysical model of low resistivity conductive sphere in homogeneous half space was established, and the forward calculation was performed on the FSM sounding curve. Then, the water yield of 131 wells in the application of FSM in the Rural Drinking Water Safety Project of 12th Five-Year Plan in Guangxi Province was counted. In addition, detailed tabular statistical analysis was carried out on the drilling results of 98 drilling wells, and the relationship between potential electrode spacing <i>MN</i> at abnormal sounding curve and actual drilling water depth was compared and studied. Theoretical analysis and practical application show that FSM has obvious effectiveness in shallow groundwater exploration, and it is an effective method to determine shallow groundwater well locations in the future. The cause of FSM anomaly is the comprehensive effect of the natural 3D alternating electromagnetic signal underground. At the same time, the practical statistics show that there is 1:1 approximation between the size of potential electrode spacing <i>MN</i> at the anomaly curve of the frequency selection method and the actual drilling water depth, which verifies the correctness of the theoretical simulation results. FSM could be widely used in the shallow groundwater exploration in the future, and it is an effective, non-destructive, fast, and low-cost geophysical method.https://www.mdpi.com/2073-4441/15/1/96geophysicsgroundwater explorationforward modelingfrequency selection method (FSM)soundingelectromagnetic field |
| spellingShingle | Lu Yulong Yang Tianchun Abdollah Taheri Tizro Liu Yang Fast Recognition on Shallow Groundwater and Anomaly Analysis Using Frequency Selection Sounding Method Water geophysics groundwater exploration forward modeling frequency selection method (FSM) sounding electromagnetic field |
| title | Fast Recognition on Shallow Groundwater and Anomaly Analysis Using Frequency Selection Sounding Method |
| title_full | Fast Recognition on Shallow Groundwater and Anomaly Analysis Using Frequency Selection Sounding Method |
| title_fullStr | Fast Recognition on Shallow Groundwater and Anomaly Analysis Using Frequency Selection Sounding Method |
| title_full_unstemmed | Fast Recognition on Shallow Groundwater and Anomaly Analysis Using Frequency Selection Sounding Method |
| title_short | Fast Recognition on Shallow Groundwater and Anomaly Analysis Using Frequency Selection Sounding Method |
| title_sort | fast recognition on shallow groundwater and anomaly analysis using frequency selection sounding method |
| topic | geophysics groundwater exploration forward modeling frequency selection method (FSM) sounding electromagnetic field |
| url | https://www.mdpi.com/2073-4441/15/1/96 |
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