Copula-based identification of the non-stationarity of the relation between runoff and sediment load

doi:10.1016/j.ijsrc.2017.03.001

	Copula-based identification of the non-stationarity of the relation between runoff and sediment load
	Huang, Shengzhi 1; Li, Pei 1; Huang, Qiang 1; Leng, Guoyong 2
刊名	INTERNATIONAL JOURNAL OF SEDIMENT RESEARCH
	2017-06-01
卷号	32 期号:2 页码:221-230
关键词	Copula-based method Runoff Sediment load Non-stationarity Change point Human activities
ISSN号	1001-6279
DOI	10.1016/j.ijsrc.2017.03.001
通讯作者	Huang, Shengzhi(huangshengzhi7788@126.com)
英文摘要	It is important to identify the non-stationarity in the relation between runoff and sediment load under the backdrop of the changing environment. This relation helps to further understand the mechanisms of runoff and sediment yield. A copula-based method was used to detect possible change points in the relation between runoff and sediment load in the Wei River Basin (WRB), China, where soil erosion is a very severe issue. The modified Mann-Kendall trend test method was applied to obtain the trends of runoff and sediment load spanning 1960-2010 at monthly and annual timescales. Finally, the causes of the identified non-stationarity of the relation between runoff and sediment load were roughly analyzed from the perspective of climate change and human activities. Results indicated that: (1) the runoff and sediment load in the Jinghe and Wei rivers were generally characterized by noticeably decreasing trends at both monthly and annual timescales; (2) both the Jinghe and Wei rivers had a common change point (2002), implying that the stationarity of the relation between runoff and sediment load in the Jinghe and Wei River was invalid; (3) human activities including increasing water consumption and growing application of soil conservation practices are dominant factors resulting in non-stationarity in the relation between runoff and sediment load in the WRB. This study provides a new idea for identifying the non-stationarity of multivariate relation in the hydro-meteorological field under the background of the changing environment. (C) 2017 International Research and Training Centre on Erosion and Sedimentation/the World Association for Sedimentation and Erosion Research. Published by Elsevier B.V. All rights reserved.
资助项目	National Natural Science Fund Major Research Plan[91325201] ; National Natural Science Fund Major Research Plan[51190093] ; National Department Public Benefit Research Foundation of the Ministry of Water Resources[201501058] ; National Major Fundamental Research Program[2011CB403306-2] ; Project of School of Water Resources and Hydropower of Xi'an University of Technology[2016ZZKT-15]
WOS关键词	YELLOW-RIVER BASIN ; WATER DISCHARGE ; CLIMATE-CHANGE ; FREQUENCY-ANALYSIS ; CHINA ; SELECTION ; EVENTS ; MODELS ; DELTA
WOS研究方向	Environmental Sciences & Ecology ; Water Resources
语种	英语
出版者	IRTCES
WOS记录号	WOS:000405496300009
资助机构	National Natural Science Fund Major Research Plan ; National Department Public Benefit Research Foundation of the Ministry of Water Resources ; National Major Fundamental Research Program ; Project of School of Water Resources and Hydropower of Xi'an University of Technology
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/62789]
专题	中国科学院地理科学与资源研究所
通讯作者	Huang, Shengzhi
作者单位	1.Xian Univ Technol, State Key Lab Base Ecohydraul Engn Arid Area, Xian 710048, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Huang, Shengzhi,Li, Pei,Huang, Qiang,et al. Copula-based identification of the non-stationarity of the relation between runoff and sediment load[J]. INTERNATIONAL JOURNAL OF SEDIMENT RESEARCH,2017,32(2):221-230.
APA	Huang, Shengzhi,Li, Pei,Huang, Qiang,&Leng, Guoyong.(2017).Copula-based identification of the non-stationarity of the relation between runoff and sediment load.INTERNATIONAL JOURNAL OF SEDIMENT RESEARCH,32(2),221-230.
MLA	Huang, Shengzhi,et al."Copula-based identification of the non-stationarity of the relation between runoff and sediment load".INTERNATIONAL JOURNAL OF SEDIMENT RESEARCH 32.2(2017):221-230.