Rainfall characteristics and thresholds for periglacial debris flows in the Parlung Zangbo Basin, southeast Tibetan Plateau | |
Deng MF(邓明枫); Chen NS(陈宁生); Ding HT(丁海涛) | |
刊名 | Journal of Earth System Science |
2018 | |
卷号 | 127页码:11 |
关键词 | Rainfall Characteristics Runoff Generated Threshold Debris Flows Southeast Tibetan Plateau |
ISSN号 | 0253-4126 |
DOI | 10.1007/s12040-017-0913-0 |
产权排序 | 1 |
文献子类 | Original Artical |
英文摘要 | The Parlung Zangbo Basin in the southeastern Tibet Plateau is affected by the summer monsoon from the Indian Ocean, which produces large rainfall gradients in the basin. Rainfall data during 2012–2015 from five new meteorological stations are used to analyse the rainfall characteristics. The daily rainfall, rainfall duration, mean rainfall intensity, and peak rainfall intensity are consistent, but sometimes contrasting. For example, these values decrease with increasing altitude, and the gradient is large downstream and small upstream, respectively. Moreover, the rainfall intensity peaks between 01:00 and 06:00 and increases during the afternoon. Based on the analysis of 14 debris flow cases in the basin, differences in the rainfall threshold differ depending on the location as sediment varieties. The sediment in the middle portions of the basin is wet and well structured; thus, long-duration, high-intensity rainfall is required to generate debris flows. Ravels in the upstream area are arid and not well structured, and short-duration rainfall is required to trigger debris flows. Between the above two locations, either long-duration, low-intensity rainfall or short-duration, high-intensity rainfall could provoke debris flows. Clearly, differences in rainfall characteristics and rainfall thresholds that are associated with the location must be considered in debris flow monitoring and warnings. |
资助项目 | National Natural Science Foundation of China[41402283] |
语种 | 英语 |
WOS记录号 | WOS:000426596600011 |
内容类型 | 期刊论文 |
源URL | [http://ir.imde.ac.cn/handle/131551/24275] |
专题 | 成都山地灾害与环境研究所_山地灾害与地表过程重点实验室 |
通讯作者 | Chen NS(陈宁生) |
推荐引用方式 GB/T 7714 | Deng MF,Chen NS,Ding HT. Rainfall characteristics and thresholds for periglacial debris flows in the Parlung Zangbo Basin, southeast Tibetan Plateau[J]. Journal of Earth System Science,2018,127:11. |
APA | Deng MF,Chen NS,&Ding HT.(2018).Rainfall characteristics and thresholds for periglacial debris flows in the Parlung Zangbo Basin, southeast Tibetan Plateau.Journal of Earth System Science,127,11. |
MLA | Deng MF,et al."Rainfall characteristics and thresholds for periglacial debris flows in the Parlung Zangbo Basin, southeast Tibetan Plateau".Journal of Earth System Science 127(2018):11. |
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