A physics-based model to derive rainfall intensity-duration threshold for debris flow

doi:10.1016/j.geomorph.2019.106930

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

	A physics-based model to derive rainfall intensity-duration threshold for debris flow
	Zhang SJ(张少杰)1; Xu, C.X.5; Wei, F.Q.2; Hu, K.H.1; Xu, H.3; Zhao,L.Q.4; Zhang, G.P.4
刊名	Geomorphology
	2020
卷号	351 页码:106931
关键词	Debris Flow I-d Threshold Water-soil Mixture Density
ISSN号	0169-555X
DOI	10.1016/j.geomorph.2019.106930
通讯作者	Wei, F. Q.(fqwei@imde.ac.cn) ; Hu, K. H.(khhu@imde.ac.cn)
产权排序	1
英文摘要	A statistical method to establish an intensity-duration curve (I-D curve) for debris flows is highly dependent on a large amount of debris flows and rainfall events and is impossible for a gully lacking observation data. To overcome this limitation, a physics-based model to derive the I-D curve is presented. In this new model, the density of the debris flow is chosen as the key parameter, based on which, the rainfall intensity and duration necessary for fitting I-D curve are obtained. The physical model is validated in Jiangjia Gully, a typical debris flow valley with several debris flows each year. A series of I-D curves under the conditions of different antecedent rainfalls were fitted. These derived curves are similar to the shape of the curve from the statistical method, but having upper and lower boundary lines related to the necessary conditions for the occurrence of debris flows. The precision of the new model is identified as about 80.5% using 63 collected rainfalls in Jiangjia Gully in Yunan province, China. This value is 27.7% higher than the curve fitted through the statistical method. This new physical model is capable of improving the deficiency of the statistical method and has great application potential for predicting debris flows.
电子版国际标准刊号	1872-695X
资助项目	National Key Research and Development Program of China[2018YFC1505503] ; Research and Demonstration Program of Precise Warning and Emergence Disposal Technologies against geo-hazards in Jiuzhaigou scenic area[KJ-2018-23] ; Natural Science Foundation of China[51809262] ; Natural Science Foundation of China[41871020]
WOS关键词	SHALLOW LANDSLIDES ; TRIGGERING RAINFALL ; JIANGJIA RAVINE ; IMPACT FORCE ; IDENTIFICATION ; MOBILIZATION ; DERIVATION ; INITIATION ; SYSTEM ; FLOODS
WOS研究方向	Physical Geography ; Geology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000514254300013
资助机构	National Key Research and Development Program of China ; Research and Demonstration Program of Precise Warning and Emergence Disposal Technologies against geo-hazards in Jiuzhaigou scenic area ; Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/34111]
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	Wei, F.Q.; Hu, K.H.
作者单位	1.山地所 2.重庆绿色智能院 3.国家气象中心 4.国家工服中心 5.美国德克萨斯理工大学
推荐引用方式 GB/T 7714	Zhang SJ,Xu, C.X.,Wei, F.Q.,et al. A physics-based model to derive rainfall intensity-duration threshold for debris flow[J]. Geomorphology,2020,351:106931.
APA	Zhang SJ.,Xu, C.X..,Wei, F.Q..,Hu, K.H..,Xu, H..,...&Zhang, G.P..(2020).A physics-based model to derive rainfall intensity-duration threshold for debris flow.Geomorphology,351,106931.
MLA	Zhang SJ,et al."A physics-based model to derive rainfall intensity-duration threshold for debris flow".Geomorphology 351(2020):106931.