Feedback mechanism between gully landforms and sediment trapping efficiency in a check dam
Check dams have been used worldwide for a variety of purposes. With increasing age, check dams gradually lose their sediment trapping function via the continuous deposition of material carried by debris flows and flash floods, and eventually, check dams become unable to perform the designed mitigati...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2025-03-01
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| Series: | International Soil and Water Conservation Research |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2095633924000522 |
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| author | Jiangang Chen Xi'an Wang Huayong Chen Wanyu Zhao Chenyuan Wang Xiaoqing Chen |
| author_facet | Jiangang Chen Xi'an Wang Huayong Chen Wanyu Zhao Chenyuan Wang Xiaoqing Chen |
| author_sort | Jiangang Chen |
| collection | DOAJ |
| description | Check dams have been used worldwide for a variety of purposes. With increasing age, check dams gradually lose their sediment trapping function via the continuous deposition of material carried by debris flows and flash floods, and eventually, check dams become unable to perform the designed mitigation function. In this paper, the sediment deposit evolution in a dam with multiple debris flow surges and its influence on the sediment trapping effect were investigated. The results showed that the debris flow deposition process can be divided into three phases: the backwater-controlled deposition phase, landform-controlled deposition phase, and quasi-equilibrium phase. The sediment trapping ratio of the check dam gradually decreased as the deposit volume increased and was linearly negatively correlated with the sediment deposition rate. Moreover, a mathematical model describing the negative feedback between deposit volume and sediment trapping ratio was established, and the physical meanings of the coefficients in the model and their empirical values were clarified. Furthermore, the deposit distribution, which satisfied the Weibull distribution in the longitudinal direction, was revealed. In the cross-sectional direction, the distribution of deposition gradually became uneven with increasing sediment filling rate. |
| format | Article |
| id | doaj-art-953f1241b06e479a96d014da7288bbd9 |
| institution | Kabale University |
| issn | 2095-6339 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | International Soil and Water Conservation Research |
| spelling | doaj-art-953f1241b06e479a96d014da7288bbd92025-01-07T04:17:16ZengKeAi Communications Co., Ltd.International Soil and Water Conservation Research2095-63392025-03-01131134144Feedback mechanism between gully landforms and sediment trapping efficiency in a check damJiangang Chen0Xi'an Wang1Huayong Chen2Wanyu Zhao3Chenyuan Wang4Xiaoqing Chen5State Key Laboratory of Natural Hazards and Engineering Safety, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, 610299, China; University of Chinese Academy Sciences, Beijing, 100049, China; Sichuan Province Engineering Technology Research Center of Mountain Hazard Mitigation, Chengdu, 610299, ChinaState Key Laboratory of Natural Hazards and Engineering Safety, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, 610299, China; University of Chinese Academy Sciences, Beijing, 100049, ChinaState Key Laboratory of Natural Hazards and Engineering Safety, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, 610299, China; University of Chinese Academy Sciences, Beijing, 100049, China; Sichuan Province Engineering Technology Research Center of Mountain Hazard Mitigation, Chengdu, 610299, ChinaState Key Laboratory of Natural Hazards and Engineering Safety, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, 610299, China; University of Chinese Academy Sciences, Beijing, 100049, China; Sichuan Province Engineering Technology Research Center of Mountain Hazard Mitigation, Chengdu, 610299, ChinaState Key Laboratory of Natural Hazards and Engineering Safety, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, 610299, China; University of Chinese Academy Sciences, Beijing, 100049, ChinaState Key Laboratory of Natural Hazards and Engineering Safety, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, 610299, China; University of Chinese Academy Sciences, Beijing, 100049, China; Sichuan Province Engineering Technology Research Center of Mountain Hazard Mitigation, Chengdu, 610299, China; Corresponding author. State Key Laboratory of Natural Hazards and Engineering Safety, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, 610299, China.Check dams have been used worldwide for a variety of purposes. With increasing age, check dams gradually lose their sediment trapping function via the continuous deposition of material carried by debris flows and flash floods, and eventually, check dams become unable to perform the designed mitigation function. In this paper, the sediment deposit evolution in a dam with multiple debris flow surges and its influence on the sediment trapping effect were investigated. The results showed that the debris flow deposition process can be divided into three phases: the backwater-controlled deposition phase, landform-controlled deposition phase, and quasi-equilibrium phase. The sediment trapping ratio of the check dam gradually decreased as the deposit volume increased and was linearly negatively correlated with the sediment deposition rate. Moreover, a mathematical model describing the negative feedback between deposit volume and sediment trapping ratio was established, and the physical meanings of the coefficients in the model and their empirical values were clarified. Furthermore, the deposit distribution, which satisfied the Weibull distribution in the longitudinal direction, was revealed. In the cross-sectional direction, the distribution of deposition gradually became uneven with increasing sediment filling rate.http://www.sciencedirect.com/science/article/pii/S2095633924000522Debris flowCheck damSediment trapping effectLandform evolution |
| spellingShingle | Jiangang Chen Xi'an Wang Huayong Chen Wanyu Zhao Chenyuan Wang Xiaoqing Chen Feedback mechanism between gully landforms and sediment trapping efficiency in a check dam International Soil and Water Conservation Research Debris flow Check dam Sediment trapping effect Landform evolution |
| title | Feedback mechanism between gully landforms and sediment trapping efficiency in a check dam |
| title_full | Feedback mechanism between gully landforms and sediment trapping efficiency in a check dam |
| title_fullStr | Feedback mechanism between gully landforms and sediment trapping efficiency in a check dam |
| title_full_unstemmed | Feedback mechanism between gully landforms and sediment trapping efficiency in a check dam |
| title_short | Feedback mechanism between gully landforms and sediment trapping efficiency in a check dam |
| title_sort | feedback mechanism between gully landforms and sediment trapping efficiency in a check dam |
| topic | Debris flow Check dam Sediment trapping effect Landform evolution |
| url | http://www.sciencedirect.com/science/article/pii/S2095633924000522 |
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