Mechanism of the “7•15” debris flow in Baiguoshu gully, Tianquan County, Sichuan Province
Compared to wide-gentle debris flows, narrow-steep gully debris flow in small watersheds are characterized by their invisible and sudden nature. Therefore, understanding the mechanism behind such disasters are crucial for engineering management and disaster prevention. This paper presents a case stu...
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Editorial Office of The Chinese Journal of Geological Hazard and Control
2024-12-01
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| Series: | Zhongguo dizhi zaihai yu fangzhi xuebao |
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| Online Access: | https://www.zgdzzhyfzxb.com/en/article/doi/10.16031/j.cnki.issn.1003-8035.202303011 |
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| author | Guanglin HUANG Xiewen HU Chuanjie XI Ruichen ZHOU Kun HE |
| author_facet | Guanglin HUANG Xiewen HU Chuanjie XI Ruichen ZHOU Kun HE |
| author_sort | Guanglin HUANG |
| collection | DOAJ |
| description | Compared to wide-gentle debris flows, narrow-steep gully debris flow in small watersheds are characterized by their invisible and sudden nature. Therefore, understanding the mechanism behind such disasters are crucial for engineering management and disaster prevention. This paper presents a case study of the “7•15” debris flow that occurred in Baiguoshu gully, Tianquan County, Sichuan Province in 2021. The process of this debris flow was thoroughly investigated through field surveys, aerial photography, and hydrodynamic simulations using RAMMS. The findings revealed that Baiguoshu gully debris flow was triggered by the cumulative antecedent rainfall and short-term heavy rainfall. The mobilized materials during the “7•15” debris flow consisted of saturated materials upstream that were eroded by floods, as well as landslides triggered by bank erosion along the gully. Subsequently, the amplification of flow discharge caused by blockages and bursting in the main channel resulted in a disaster at the gully outlet and the buried of the Yakang Expressway. The Baiguoshu gully is prone to debris flow occurrences due to the abundance of source materials and favorable hydrodynamic conditions. |
| format | Article |
| id | doaj-art-2c4b264ec2c5486dbce5baaf6e378762 |
| institution | OA Journals |
| issn | 1003-8035 |
| language | zho |
| publishDate | 2024-12-01 |
| publisher | Editorial Office of The Chinese Journal of Geological Hazard and Control |
| record_format | Article |
| series | Zhongguo dizhi zaihai yu fangzhi xuebao |
| spelling | doaj-art-2c4b264ec2c5486dbce5baaf6e3787622025-08-20T02:38:19ZzhoEditorial Office of The Chinese Journal of Geological Hazard and ControlZhongguo dizhi zaihai yu fangzhi xuebao1003-80352024-12-01356909710.16031/j.cnki.issn.1003-8035.202303011202303011Mechanism of the “7•15” debris flow in Baiguoshu gully, Tianquan County, Sichuan ProvinceGuanglin HUANG0Xiewen HU1Chuanjie XI2Ruichen ZHOU3Kun HE4Faculty of Geosciences and Environment Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, ChinaFaculty of Geosciences and Environment Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, ChinaFaculty of Geosciences and Environment Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, ChinaFaculty of Geosciences and Environment Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, ChinaFaculty of Geosciences and Environment Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, ChinaCompared to wide-gentle debris flows, narrow-steep gully debris flow in small watersheds are characterized by their invisible and sudden nature. Therefore, understanding the mechanism behind such disasters are crucial for engineering management and disaster prevention. This paper presents a case study of the “7•15” debris flow that occurred in Baiguoshu gully, Tianquan County, Sichuan Province in 2021. The process of this debris flow was thoroughly investigated through field surveys, aerial photography, and hydrodynamic simulations using RAMMS. The findings revealed that Baiguoshu gully debris flow was triggered by the cumulative antecedent rainfall and short-term heavy rainfall. The mobilized materials during the “7•15” debris flow consisted of saturated materials upstream that were eroded by floods, as well as landslides triggered by bank erosion along the gully. Subsequently, the amplification of flow discharge caused by blockages and bursting in the main channel resulted in a disaster at the gully outlet and the buried of the Yakang Expressway. The Baiguoshu gully is prone to debris flow occurrences due to the abundance of source materials and favorable hydrodynamic conditions.https://www.zgdzzhyfzxb.com/en/article/doi/10.16031/j.cnki.issn.1003-8035.202303011narrow-steep gullydebris flowsmall watershed areadisaster mechanismramms |
| spellingShingle | Guanglin HUANG Xiewen HU Chuanjie XI Ruichen ZHOU Kun HE Mechanism of the “7•15” debris flow in Baiguoshu gully, Tianquan County, Sichuan Province Zhongguo dizhi zaihai yu fangzhi xuebao narrow-steep gully debris flow small watershed area disaster mechanism ramms |
| title | Mechanism of the “7•15” debris flow in Baiguoshu gully, Tianquan County, Sichuan Province |
| title_full | Mechanism of the “7•15” debris flow in Baiguoshu gully, Tianquan County, Sichuan Province |
| title_fullStr | Mechanism of the “7•15” debris flow in Baiguoshu gully, Tianquan County, Sichuan Province |
| title_full_unstemmed | Mechanism of the “7•15” debris flow in Baiguoshu gully, Tianquan County, Sichuan Province |
| title_short | Mechanism of the “7•15” debris flow in Baiguoshu gully, Tianquan County, Sichuan Province |
| title_sort | mechanism of the 7•15 debris flow in baiguoshu gully tianquan county sichuan province |
| topic | narrow-steep gully debris flow small watershed area disaster mechanism ramms |
| url | https://www.zgdzzhyfzxb.com/en/article/doi/10.16031/j.cnki.issn.1003-8035.202303011 |
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