Analysis on disaster characteristics and prevention measures of the post-fire debris flow in Dianchichang gully, Xichang of Sichuan Province
Post-fire debris flow is a special torrent containing a large amount of loose material, which is closely related to forest fire. Its characteristics are significantly different from the conventional debris flow. Therefore, conventional debris flow prevention experience is not completely applicable t...
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Editorial Office of The Chinese Journal of Geological Hazard and Control
2022-08-01
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| Series: | Zhongguo dizhi zaihai yu fangzhi xuebao |
| Subjects: | |
| Online Access: | https://www.zgdzzhyfzxb.com/en/article/doi/10.16031/j.cnki.issn.1003-8035.202203039 |
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| author | Xiangbin YANG Xiewen HU Xichao CAO Tao JIN Chuanjie XI Jian HUANG Ying YANG |
| author_facet | Xiangbin YANG Xiewen HU Xichao CAO Tao JIN Chuanjie XI Jian HUANG Ying YANG |
| author_sort | Xiangbin YANG |
| collection | DOAJ |
| description | Post-fire debris flow is a special torrent containing a large amount of loose material, which is closely related to forest fire. Its characteristics are significantly different from the conventional debris flow. Therefore, conventional debris flow prevention experience is not completely applicable to it. After the fire that broke out on March 30 in Xichang, debris flow occurred frequently in burned area, seriously threatening the safety of local people's lives and property. It is necessary and urgent to study the characteristics of debris flow after fire and put forward comprehensive prevention and control measures. This study takes Dianchichang gully in Xichang, Liangshan Yi Autonomous Prefecture, Sichuan Province as a typical case. Analyzed the characteristics of burned area and watershed. Studied the characteristics of post-fire debris flow disaster. And proposed the corresponding prevention and control measures. The results show that the burned area covered 83.37%, seriously burned areas accounted for 33.47%, resulting in widely spread ash layer. Slope provenance accounted for 69.83%. Post-fire debris flow occurred one month after the forest fire, and a total of 5 debris flows occurred in the first rainy season. Moreover, the threshold of debris flow starting rainfall is small and the occurrence of debris flow increases rapidly. The post-fire debris flows in the study site are characterized by high frequency and sudden occurrence. Accordingly, the corresponding prevention and control measures were propound as follows. The rapid emergency treatment measures include clarifying dead wood on slope surface, vegetation restoration, and building of simple barrier dams in gully. Medium-term governance measures are debris dams in gully and grit basins. And long-term prevention measures are a combination of forest fire prevention and vegetation protection. This scheme has been implemented in Dianchichang gully. Since the completion of these projects, the effects of comprehensive treatments have been preliminarily proved effective for the mitigation of this type of special debris flow. It can provide reference for post-fire debris flow prevention in the future. |
| first_indexed | 2024-04-09T22:20:02Z |
| format | Article |
| id | doaj.art-d85838f5214e4e2cb9278170326f0f60 |
| institution | Directory Open Access Journal |
| issn | 1003-8035 |
| language | zho |
| last_indexed | 2024-04-09T22:20:02Z |
| publishDate | 2022-08-01 |
| publisher | Editorial Office of The Chinese Journal of Geological Hazard and Control |
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| series | Zhongguo dizhi zaihai yu fangzhi xuebao |
| spelling | doaj.art-d85838f5214e4e2cb9278170326f0f602023-03-22T16:11:51ZzhoEditorial Office of The Chinese Journal of Geological Hazard and ControlZhongguo dizhi zaihai yu fangzhi xuebao1003-80352022-08-013341810.16031/j.cnki.issn.1003-8035.202203039202203039Analysis on disaster characteristics and prevention measures of the post-fire debris flow in Dianchichang gully, Xichang of Sichuan ProvinceXiangbin YANG0Xiewen HU1Xichao CAO2Tao JIN3Chuanjie XI4Jian HUANG5Ying YANG6Faculty of Geosciences and Environment Engineering, Southwest Jiaotong University, Chengdu, Sichuan 611756, ChinaFaculty of Geosciences and Environment Engineering, Southwest Jiaotong University, Chengdu, Sichuan 611756, ChinaFaculty of Geosciences and Environment Engineering, Southwest Jiaotong University, Chengdu, Sichuan 611756, ChinaFaculty of Geosciences and Environment Engineering, Southwest Jiaotong University, Chengdu, Sichuan 611756, ChinaFaculty of Geosciences and Environment Engineering, Southwest Jiaotong University, Chengdu, Sichuan 611756, ChinaFaculty of Geosciences and Environment Engineering, Southwest Jiaotong University, Chengdu, Sichuan 611756, ChinaFaculty of Geosciences and Environment Engineering, Southwest Jiaotong University, Chengdu, Sichuan 611756, ChinaPost-fire debris flow is a special torrent containing a large amount of loose material, which is closely related to forest fire. Its characteristics are significantly different from the conventional debris flow. Therefore, conventional debris flow prevention experience is not completely applicable to it. After the fire that broke out on March 30 in Xichang, debris flow occurred frequently in burned area, seriously threatening the safety of local people's lives and property. It is necessary and urgent to study the characteristics of debris flow after fire and put forward comprehensive prevention and control measures. This study takes Dianchichang gully in Xichang, Liangshan Yi Autonomous Prefecture, Sichuan Province as a typical case. Analyzed the characteristics of burned area and watershed. Studied the characteristics of post-fire debris flow disaster. And proposed the corresponding prevention and control measures. The results show that the burned area covered 83.37%, seriously burned areas accounted for 33.47%, resulting in widely spread ash layer. Slope provenance accounted for 69.83%. Post-fire debris flow occurred one month after the forest fire, and a total of 5 debris flows occurred in the first rainy season. Moreover, the threshold of debris flow starting rainfall is small and the occurrence of debris flow increases rapidly. The post-fire debris flows in the study site are characterized by high frequency and sudden occurrence. Accordingly, the corresponding prevention and control measures were propound as follows. The rapid emergency treatment measures include clarifying dead wood on slope surface, vegetation restoration, and building of simple barrier dams in gully. Medium-term governance measures are debris dams in gully and grit basins. And long-term prevention measures are a combination of forest fire prevention and vegetation protection. This scheme has been implemented in Dianchichang gully. Since the completion of these projects, the effects of comprehensive treatments have been preliminarily proved effective for the mitigation of this type of special debris flow. It can provide reference for post-fire debris flow prevention in the future.https://www.zgdzzhyfzxb.com/en/article/doi/10.16031/j.cnki.issn.1003-8035.202203039post-fire debris flowburned areadisaster characteristiccomprehensive control measuresengineering management |
| spellingShingle | Xiangbin YANG Xiewen HU Xichao CAO Tao JIN Chuanjie XI Jian HUANG Ying YANG Analysis on disaster characteristics and prevention measures of the post-fire debris flow in Dianchichang gully, Xichang of Sichuan Province Zhongguo dizhi zaihai yu fangzhi xuebao post-fire debris flow burned area disaster characteristic comprehensive control measures engineering management |
| title | Analysis on disaster characteristics and prevention measures of the post-fire debris flow in Dianchichang gully, Xichang of Sichuan Province |
| title_full | Analysis on disaster characteristics and prevention measures of the post-fire debris flow in Dianchichang gully, Xichang of Sichuan Province |
| title_fullStr | Analysis on disaster characteristics and prevention measures of the post-fire debris flow in Dianchichang gully, Xichang of Sichuan Province |
| title_full_unstemmed | Analysis on disaster characteristics and prevention measures of the post-fire debris flow in Dianchichang gully, Xichang of Sichuan Province |
| title_short | Analysis on disaster characteristics and prevention measures of the post-fire debris flow in Dianchichang gully, Xichang of Sichuan Province |
| title_sort | analysis on disaster characteristics and prevention measures of the post fire debris flow in dianchichang gully xichang of sichuan province |
| topic | post-fire debris flow burned area disaster characteristic comprehensive control measures engineering management |
| url | https://www.zgdzzhyfzxb.com/en/article/doi/10.16031/j.cnki.issn.1003-8035.202203039 |
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