Rainfall threshold for initiation of channelized debris flows in a small catchment based on in-site measurement

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部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

	Rainfall threshold for initiation of channelized debris flows in a small catchment based on in-site measurement
	Wei, Zhenlei 1; Shang, Yuequan 1; Zhao, Yu1 ; Pan, Pan 1; Jiang, Yuanjun2
刊名	ENGINEERING GEOLOGY
	2017-01-30
卷号	217 页码:23-34
关键词	Debris flow Small catchment Rainfall characteristics Runoff Prediction Rainfall threshold
ISSN号	0013-7952
通讯作者	Yu Zhao
英文摘要	The peak runoff discharge plays an important role in triggering channelized debris flows, especially for small catchments, due to the features of a small area and short channels. In small catchments, intense rainfall can trigger a flood within a short period of time. But currently, there are few rainfall threshold models that address the runoff from short-duration (<2 h) rainfall. In this context, 37 short-duration rainfall events were analyzed, and field measurements were made for a partially-modified landscape in order to compare the variation in the amount of runoff. The grey relational analysis allowed us to rank the influence of the various factors that affected variations in the runoff. The results indicated that the intensity of rainfall was the most important factor, having a greater effect than other factors, such as the depth of the rainfall and its duration. Then, we trained a runoff prediction model based on these factors and verified its accuracy using the moving least squares (MLS) method, the genetic back-propagation neural network (GABP) method and the genetic support vector machine (GASVM) method. This analysis indicated that the MLS method had the best predictive capability. The assessment of the debris-flow hazard based on the predicted runoff and intensity-duration-frequency (IDF) curves is discussed in the study area. It was indicated that even a rainfall event of a two-year return period was dangerous for this specific case. (C) 2016 Elsevier B.V. All rights reserved.
WOS标题词	Science & Technology ; Technology ; Physical Sciences
类目[WOS]	Engineering, Geological ; Geosciences, Multidisciplinary
研究领域[WOS]	Engineering ; Geology
关键词[WOS]	GREY RELATIONAL ANALYSIS ; WENCHUAN EARTHQUAKE AREA ; INDUCED LANDSLIDES ; PERFORMANCE-CHARACTERISTICS ; SHALLOW LANDSLIDES ; RUNOFF ; CHINA ; PREDICTION ; FREQUENCY ; DOLOMITES
收录类别	SCI
语种	英语
WOS记录号	WOS:000393245400003
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/18411]
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
作者单位	1.Zhejiang Univ, Coll Civil Engn & Architecture, Hangzhou 310058, Zhejiang, Peoples R China 2.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu, Peoples R China
推荐引用方式 GB/T 7714	Wei, Zhenlei,Shang, Yuequan,Zhao, Yu,et al. Rainfall threshold for initiation of channelized debris flows in a small catchment based on in-site measurement[J]. ENGINEERING GEOLOGY,2017,217:23-34.
APA	Wei, Zhenlei,Shang, Yuequan,Zhao, Yu,Pan, Pan,&Jiang, Yuanjun.(2017).Rainfall threshold for initiation of channelized debris flows in a small catchment based on in-site measurement.ENGINEERING GEOLOGY,217,23-34.
MLA	Wei, Zhenlei,et al."Rainfall threshold for initiation of channelized debris flows in a small catchment based on in-site measurement".ENGINEERING GEOLOGY 217(2017):23-34.