An assessment of human versus climatic impacts on large-sized basin erosion: the case of the upper Yangtze River

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 > 山地表生过程与生态调控重点实验室

	An assessment of human versus climatic impacts on large-sized basin erosion: the case of the upper Yangtze River
	Wei, Jie 1; Hou, Lin 1; He, Xiubin2
刊名	NATURAL HAZARDS
	2014-11-01
卷号	74 期号:2 页码:405-420
关键词	Basin erosion Watershed sediment yield Human activities Rainfall erosivity Upper Yangtze basin
ISSN号	0921-030X
通讯作者	Wei, Jie
英文摘要	Riverine sediment load, a reflection of basin erosion and sediment yield, is influenced by both climatic and human factors. Complex interaction between various factors within a basin dampens and counteracts the forces that drive sediment variations. The gross human impact index and the index estimation method have both been proposed to reflect the impacts of human activities on soil erosion and sediment yield. Sediment load and daily rainfall data from 1955 to 2010 in the upper Yangtze basin, and in the Wu, Jialing, Min and Jinsha subbasins, were collected to assess the human versus climatic impacts on sediment yield. From 1955 to 2010, the average annual runoff in the study area was 428.2 billion m(3), and the average annual suspended sediment load was approximately 0.43 billion t. There was a critical point in 1984, 1985, 1991, 1993 and 1999 when the sediment load decreased in the Wu, Jialing, upper Yangtze, Min and Jinsha river, respectively. The annual regional rainfall erosivities in the upper Yangtze basin in most years ranged between 2,500 and 3,500 MJ mm hm(-2) h(-1) year(-1) and fluctuated around 3,000 MJ mm hm(-2) h(-1) year(-1) with a small coefficient of variation of 0.11. In the Jinsha subbasin, the index indicated that increasing rainfall erosivity could not account for the reduction in riverine sediment load and that anthropogenic erosion-control measures played a key role. The index values for the Min, Jialing and Wu subbasins ranged from 76 to 97 % and for the upper Yangtze basin is 95 %, demonstrating the joint effects of precipitation and human activities in all basins, with erosion-controlling measures playing a major role in sediment load reduction.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences ; Water Resources
研究领域[WOS]	Geology ; Meteorology & Atmospheric Sciences ; Water Resources
关键词[WOS]	SEDIMENT YIELD ; LAND-USE ; CHINESE RIVERS ; WORLDS RIVERS ; RAINFALL DATA ; SOIL-EROSION ; TRIBUTARIES ; DISCHARGE ; TRENDS ; REGIME
收录类别	SCI
语种	英语
WOS记录号	WOS:000342910400005
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/9941]
专题	成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
作者单位	1.Chongqing Normal Univ, Geog & Tourism Coll, Chongqing 400047, Peoples R China 2.Chinese Acad Sci, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu 610041, Peoples R China
推荐引用方式 GB/T 7714	Wei, Jie,Hou, Lin,He, Xiubin. An assessment of human versus climatic impacts on large-sized basin erosion: the case of the upper Yangtze River[J]. NATURAL HAZARDS,2014,74(2):405-420.
APA	Wei, Jie,Hou, Lin,&He, Xiubin.(2014).An assessment of human versus climatic impacts on large-sized basin erosion: the case of the upper Yangtze River.NATURAL HAZARDS,74(2),405-420.
MLA	Wei, Jie,et al."An assessment of human versus climatic impacts on large-sized basin erosion: the case of the upper Yangtze River".NATURAL HAZARDS 74.2(2014):405-420.