Field observation of debris-flow activities in the initiation area of the Jiangjia Gully, Yunnan Province, China
文献类型：期刊论文
| 作者 | YANG Hong-juan1; ZHANG Shao-jie1; HU Kai-heng1; WEI Fang-qiang2 ; WANG Kai1; LIU Shuang1
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| 刊名 | JOURNAL OF MOUNTAIN SCIENCE
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| 出版日期 | 2022-06-01 |
| 卷号 | 19期号:6页码:1602-1617 |
| ISSN号 | 1672-6316 |
| 关键词 | Debris flow Field observation Initiation mechanism Rainfall threshold Jiangjia gully |
| DOI | 10.1007/s11629-021-7292-3 |
| 通讯作者 | ZHANG Shao-jie(sj-zhang@imde.ac.cn) |
| 英文摘要 | The Jiangjia Gully, which is located in Dongchuan District, Yunnan Province, China, is a watershed prone to debris flows and has long-term recorded data of debris-flow occurrence. However, the initiation mechanism has mainly been studied by experiments in this watershed. To further reveal debris-flow formation mechanism in the Jiangjia Gully, debris-flow activities in the initiation zone were observed with hand-held video cameras in the summer of 2016 and 2017. In these two years, six debris-flow events were triggered in Menqian Gully, a major tributary of the Jiangjia Gully, while debris-flow activities in some sub-watersheds of Menqian Gully were recorded with video cameras in four events. The video recording shows that landslides constituted an important source for sediment supply in debris flow. Some landslides directly evolved into debris flows, while the others released sediment into rills and channels, where debris flows were generated for sediment entrainment by water flow. Therefore, debris-flow occurrence in the Jiangjia Gully is influenced both by infiltration-dominated processes and by runoff-dominated processes. In addition, rainfall data from four gauges installed in Menqian Gully were analyzed using mean intensity (I), duration (D), peak 10-minute rainfall (R-10min) and antecedent rainfall (AR) up to 15 days prior to peak 10-minute rainfall. It reveals that debris-flow triggering events can be discriminated from non-triggering events either by an I-D threshold or by an R-10min-AR threshold. However, false alarms can be greatly reduced if these two kinds of thresholds are used together. Moreover, behaviors including intermittency of debris flow, variance in moisture content and volume among surges, and coalescence of multiple surges by temporary damming were observed, indicating the complexity of debris-flow initiation processes. These findings are expected to enhance our knowledge on debris-flow formation mechanism in regions with similar environmental settings. |
| 资助项目 | National Key Research and Development Program of China[2020YFD1100701] ; Science and Technology Research and Development Program of China Railway[K2019G006] ; Chongqing Municipal Bureau of Land, Resources and Housing Administration[KJ-2021016] |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| 出版者 | SCIENCE PRESS |
| WOS记录号 | WOS:000819035700009 |
| 源URL | [http://119.78.100.138/handle/2HOD01W0/15967]  |
| 专题 | 中国科学院重庆绿色智能技术研究院 |
| 通讯作者 | ZHANG Shao-jie |
| 作者单位 | 1.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Hazards & Earth Surface Proc, Chengdu 610041, Peoples R China 2.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China |
| 推荐引用方式 GB/T 7714 | YANG Hong-juan,ZHANG Shao-jie,HU Kai-heng,et al. Field observation of debris-flow activities in the initiation area of the Jiangjia Gully, Yunnan Province, China[J]. JOURNAL OF MOUNTAIN SCIENCE,2022,19(6):1602-1617. |
| APA | YANG Hong-juan,ZHANG Shao-jie,HU Kai-heng,WEI Fang-qiang,WANG Kai,&LIU Shuang.(2022).Field observation of debris-flow activities in the initiation area of the Jiangjia Gully, Yunnan Province, China.JOURNAL OF MOUNTAIN SCIENCE,19(6),1602-1617. |
| MLA | YANG Hong-juan,et al."Field observation of debris-flow activities in the initiation area of the Jiangjia Gully, Yunnan Province, China".JOURNAL OF MOUNTAIN SCIENCE 19.6(2022):1602-1617. |
入库方式： OAI收割
来源：重庆绿色智能技术研究院
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