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| DOI | 10.1007/s11069-020-03867-3 |
| GIS-based assessment of debris flow hazards in Kulekhani Watershed, Nepal | |
| Paudel B.; Fall M.; Daneshfar B. | |
| 发表日期 | 2020 |
| ISSN | 0921030X |
| 起始页码 | 143 |
| 结束页码 | 172 |
| 卷号 | 101期号:1 |
| 英文摘要 | Debris flows are a hazardous natural calamity in mountainous regions of Nepal. Torrential rainfall within a very short period of the year is the main triggering factor for instability of slopes and initiation of landslides in these regions. Furthermore, the topography of the mountains and poor land use practices are additional factors that contribute to these instabilities. In this research, a GIS model has been developed to assess the debris flow hazard in mountainous regions of Nepal. Landslide-triggering threshold rainfall frequency is related to the frequency of landslides and the debris flow hazard in these mountains. Rainfall records from 1980 to 2013 are computed for one- to seven-day cumulative annual maximum rainfall. The expected rainfall for 1 in 10 to 1 in 1000 years of return periods is analyzed. The expected threshold rainfall is modeled in the GIS environment to identify the factor of safety of mountain slopes in a study watershed. A relation between the frequency of rainfall and debris flow hazard area is derived for return periods of 25, 50, 100, and 200 years. The debris flow hazard results from the analysis are compared with a known event in the watershed and found to agree. This method can be applied to anticipated rainfall-induced debris flow from the live rainfall record to warn the hazard-prone community in these mountains. © 2020, Springer Nature B.V. |
| 关键词 | Debris flowHazard assessmentHimalayaLandslidesRainfall |
| 英文关键词 | debris flow; extreme event; frequency analysis; hazard assessment; landslide; precipitation intensity; slope stability; Himalayas; Nepal |
| 语种 | 英语 |
| 来源期刊 | Natural Hazards
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/205870 |
| 作者单位 | Department of Civil Engineering, University of Ottawa, 161 Colonel By, Ottawa, ON K1N 6N5, Canada; Agriculture and Agri-Food Canada, 960, Carling Avenue, Ottawa, ON K1A 0C6, Canada |
| 推荐引用方式 GB/T 7714 | Paudel B.,Fall M.,Daneshfar B.. GIS-based assessment of debris flow hazards in Kulekhani Watershed, Nepal[J],2020,101(1). |
| APA | Paudel B.,Fall M.,&Daneshfar B..(2020).GIS-based assessment of debris flow hazards in Kulekhani Watershed, Nepal.Natural Hazards,101(1). |
| MLA | Paudel B.,et al."GIS-based assessment of debris flow hazards in Kulekhani Watershed, Nepal".Natural Hazards 101.1(2020). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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