The Influence of Internal Erosion in Earthen Dams on the Potential Difference Response to Applied Voltage
Internal erosion is widely perceived as contributing to the failure of earthen dams. To reduce the failure risk, timely monitoring of internal erosion is an effective method in observing their internal structure evolution. A set of earthen dam model experiments were conducted. Under an applied volta...
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| Format: | Article |
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MDPI AG
2021-12-01
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| Series: | Water |
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| Online Access: | https://www.mdpi.com/2073-4441/13/23/3387 |
| _version_ | 1797507182310195200 |
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| author | Mingjie Zhao Pan Liu Li Jiang Kui Wang |
| author_facet | Mingjie Zhao Pan Liu Li Jiang Kui Wang |
| author_sort | Mingjie Zhao |
| collection | DOAJ |
| description | Internal erosion is widely perceived as contributing to the failure of earthen dams. To reduce the failure risk, timely monitoring of internal erosion is an effective method in observing their internal structure evolution. A set of earthen dam model experiments were conducted. Under an applied voltage, the response potential differences (PD) at the slope of the dam models were collected before and after the impoundment of the upstream reservoir. The discrepancy among the four dam models, the influence of soil moisture content on PD, and the impact of internal erosion on PD were studied. The results show that it is acceptable to employ different dam models to simulate the development of internal erosion, although the discrepancy among the models is inevitable. The moisture content of the soil significantly affects the PD response to applied voltage. The PD increases with an increase in soil moisture content until the soil is saturated. The change in PD is correlated with the development of internal erosion. With the progression of internal erosion, the starting position for the steep increase in PD distribution continues to move toward the dam toe. In addition, the electrode stability is noted to have an effect on measured PD, which requires further studies to be clarified. This study sets the stage for the PD-based monitoring method in observing the evolution of internal erosion in earthen dams. |
| first_indexed | 2024-03-10T04:43:01Z |
| format | Article |
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| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-10T04:43:01Z |
| publishDate | 2021-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Water |
| spelling | doaj.art-f1019eea232d49569b3d3078accb52df2023-11-23T03:14:47ZengMDPI AGWater2073-44412021-12-011323338710.3390/w13233387The Influence of Internal Erosion in Earthen Dams on the Potential Difference Response to Applied VoltageMingjie Zhao0Pan Liu1Li Jiang2Kui Wang3Key Laboratory of Hydraulic and Waterway Engineering of the Ministry of Education, Chongqing Jiaotong University, Chongqing 400074, ChinaKey Laboratory of Hydraulic and Waterway Engineering of the Ministry of Education, Chongqing Jiaotong University, Chongqing 400074, ChinaKey Laboratory of Hydraulic and Waterway Engineering of the Ministry of Education, Chongqing Jiaotong University, Chongqing 400074, ChinaEngineering Research Center of Diagnosis Technology and Instruments of Hydro-Construction, Chongqing Jiaotong University, Chongqing 400074, ChinaInternal erosion is widely perceived as contributing to the failure of earthen dams. To reduce the failure risk, timely monitoring of internal erosion is an effective method in observing their internal structure evolution. A set of earthen dam model experiments were conducted. Under an applied voltage, the response potential differences (PD) at the slope of the dam models were collected before and after the impoundment of the upstream reservoir. The discrepancy among the four dam models, the influence of soil moisture content on PD, and the impact of internal erosion on PD were studied. The results show that it is acceptable to employ different dam models to simulate the development of internal erosion, although the discrepancy among the models is inevitable. The moisture content of the soil significantly affects the PD response to applied voltage. The PD increases with an increase in soil moisture content until the soil is saturated. The change in PD is correlated with the development of internal erosion. With the progression of internal erosion, the starting position for the steep increase in PD distribution continues to move toward the dam toe. In addition, the electrode stability is noted to have an effect on measured PD, which requires further studies to be clarified. This study sets the stage for the PD-based monitoring method in observing the evolution of internal erosion in earthen dams.https://www.mdpi.com/2073-4441/13/23/3387earthen daminternal erosionphysical modelpotential difference (PD)response |
| spellingShingle | Mingjie Zhao Pan Liu Li Jiang Kui Wang The Influence of Internal Erosion in Earthen Dams on the Potential Difference Response to Applied Voltage Water earthen dam internal erosion physical model potential difference (PD) response |
| title | The Influence of Internal Erosion in Earthen Dams on the Potential Difference Response to Applied Voltage |
| title_full | The Influence of Internal Erosion in Earthen Dams on the Potential Difference Response to Applied Voltage |
| title_fullStr | The Influence of Internal Erosion in Earthen Dams on the Potential Difference Response to Applied Voltage |
| title_full_unstemmed | The Influence of Internal Erosion in Earthen Dams on the Potential Difference Response to Applied Voltage |
| title_short | The Influence of Internal Erosion in Earthen Dams on the Potential Difference Response to Applied Voltage |
| title_sort | influence of internal erosion in earthen dams on the potential difference response to applied voltage |
| topic | earthen dam internal erosion physical model potential difference (PD) response |
| url | https://www.mdpi.com/2073-4441/13/23/3387 |
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