The development characteristics and mechanisms of the Xigou debris flow in the Three Gorges Reservoir Region
Debris flow is a common geological hazard in mountainous areas of China, often causing secondary disasters and seriously threatening residents and infrastructure. This paper uses the Xigou debris flow in the Three Gorges Reservoir Region (TGRR) as an example case study, the development characteristi...
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| Format: | Article |
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Frontiers Media S.A.
2023-01-01
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| Series: | Frontiers in Earth Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2023.1122562/full |
| _version_ | 1797951888917790720 |
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| author | Zhenwei Dai Anle Zhang Shufeng Wang Xiaolin Fu Longwei Yang Xiannian Jiang Heng Wang |
| author_facet | Zhenwei Dai Anle Zhang Shufeng Wang Xiaolin Fu Longwei Yang Xiannian Jiang Heng Wang |
| author_sort | Zhenwei Dai |
| collection | DOAJ |
| description | Debris flow is a common geological hazard in mountainous areas of China, often causing secondary disasters and seriously threatening residents and infrastructure. This paper uses the Xigou debris flow in the Three Gorges Reservoir Region (TGRR) as an example case study, the development characteristics and initiation pattern of which were analyzed based on field investigation. The disaster dynamics software DAN-W was then used to simulate the entire initiation-movement-accumulation process of the debris flow and conduct the debris flow dynamics analysis. The paper also simulated and predicted the movements of landslides in the formation area of a debris flow after its initiation. The results show that the movement duration of the Xigou debris flow was approximately 40 s, the maximum velocity was 37.1 m/s, the maximum thickness of the accumulation was 18.7 m, and the farthest movement distance was 930 m, which are consistent with the field investigation. When the volumes of landslide transformed into a new source material of debris flow are 5 × 104, 10 × 104, 15 × 104, 20 × 104, and 26 × 104 m3, the movement distances of the debris flows are 250, 280, 300, 340, and 375 m, respectively. When the volume of the source material exceeds 20 × 104 m3, debris flow movement can seriously impact the residential houses at the entrance of the gully. This paper can provide a scientific basis for the prevention and mitigation of the Xigou debris flow. |
| first_indexed | 2024-04-10T22:37:44Z |
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| id | doaj.art-c5b08495197c470d9c6f1ef74a67b077 |
| institution | Directory Open Access Journal |
| issn | 2296-6463 |
| language | English |
| last_indexed | 2024-04-10T22:37:44Z |
| publishDate | 2023-01-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Earth Science |
| spelling | doaj.art-c5b08495197c470d9c6f1ef74a67b0772023-01-16T10:09:02ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632023-01-011110.3389/feart.2023.11225621122562The development characteristics and mechanisms of the Xigou debris flow in the Three Gorges Reservoir RegionZhenwei Dai0Anle Zhang1Shufeng Wang2Xiaolin Fu3Longwei Yang4Xiannian Jiang5Heng Wang6Wuhan Center, China Geological Survey, (Central South China Innovation Center for Geosciences), Wuhan, Hubei, ChinaCollege of Civil Engineering and Architecture, China Three Gorges University, Yichang, Hubei, ChinaWuhan Center, China Geological Survey, (Central South China Innovation Center for Geosciences), Wuhan, Hubei, ChinaWuhan Center, China Geological Survey, (Central South China Innovation Center for Geosciences), Wuhan, Hubei, ChinaWuhan Design and Research Institute Co., Ltd., of China Coal Technology and Engineering Group, Wuhan, Hubei, ChinaNo. 208 Hydrogeology and Engineering Geology Team of Chongqing Bureau of Geology and Minerals Exploration, Chongqing, ChinaNo. 208 Hydrogeology and Engineering Geology Team of Chongqing Bureau of Geology and Minerals Exploration, Chongqing, ChinaDebris flow is a common geological hazard in mountainous areas of China, often causing secondary disasters and seriously threatening residents and infrastructure. This paper uses the Xigou debris flow in the Three Gorges Reservoir Region (TGRR) as an example case study, the development characteristics and initiation pattern of which were analyzed based on field investigation. The disaster dynamics software DAN-W was then used to simulate the entire initiation-movement-accumulation process of the debris flow and conduct the debris flow dynamics analysis. The paper also simulated and predicted the movements of landslides in the formation area of a debris flow after its initiation. The results show that the movement duration of the Xigou debris flow was approximately 40 s, the maximum velocity was 37.1 m/s, the maximum thickness of the accumulation was 18.7 m, and the farthest movement distance was 930 m, which are consistent with the field investigation. When the volumes of landslide transformed into a new source material of debris flow are 5 × 104, 10 × 104, 15 × 104, 20 × 104, and 26 × 104 m3, the movement distances of the debris flows are 250, 280, 300, 340, and 375 m, respectively. When the volume of the source material exceeds 20 × 104 m3, debris flow movement can seriously impact the residential houses at the entrance of the gully. This paper can provide a scientific basis for the prevention and mitigation of the Xigou debris flow.https://www.frontiersin.org/articles/10.3389/feart.2023.1122562/fullDAN-Wdebris flowdevelopment characteristicsdisaster mechanismthe three gorges reservoir region |
| spellingShingle | Zhenwei Dai Anle Zhang Shufeng Wang Xiaolin Fu Longwei Yang Xiannian Jiang Heng Wang The development characteristics and mechanisms of the Xigou debris flow in the Three Gorges Reservoir Region Frontiers in Earth Science DAN-W debris flow development characteristics disaster mechanism the three gorges reservoir region |
| title | The development characteristics and mechanisms of the Xigou debris flow in the Three Gorges Reservoir Region |
| title_full | The development characteristics and mechanisms of the Xigou debris flow in the Three Gorges Reservoir Region |
| title_fullStr | The development characteristics and mechanisms of the Xigou debris flow in the Three Gorges Reservoir Region |
| title_full_unstemmed | The development characteristics and mechanisms of the Xigou debris flow in the Three Gorges Reservoir Region |
| title_short | The development characteristics and mechanisms of the Xigou debris flow in the Three Gorges Reservoir Region |
| title_sort | development characteristics and mechanisms of the xigou debris flow in the three gorges reservoir region |
| topic | DAN-W debris flow development characteristics disaster mechanism the three gorges reservoir region |
| url | https://www.frontiersin.org/articles/10.3389/feart.2023.1122562/full |
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