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An assessment of human versus climatic impacts on large-sized basin erosion: the case of the upper Yangtze River
Wei, Jie1; Hou, Lin1; He, Xiubin2
Corresponding AuthorWei, Jie
2014-11-01
Source PublicationNATURAL HAZARDS
ISSN0921-030X
Volume74Issue:2Pages:405-420
SubtypeArticle
AbstractRiverine 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.
KeywordBasin Erosion Watershed Sediment Yield Human Activities Rainfall Erosivity Upper Yangtze Basin
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1007/s11069-014-1190-8
WOS Subject ExtendedGeology ; Meteorology & Atmospheric Sciences ; Water Resources
Indexed BySCI
WOS KeywordSEDIMENT YIELD ; LAND-USE ; CHINESE RIVERS ; WORLDS RIVERS ; RAINFALL DATA ; SOIL-EROSION ; TRIBUTARIES ; DISCHARGE ; TRENDS ; REGIME
Language英语
WOS SubjectGeosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences ; Water Resources
WOS IDWOS:000342910400005
Funding OrganizationNational Key Technology R D Program(2011BAD31B03)
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/9941
Collection山地表生过程与生态调控重点实验室
Affiliation1.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
Recommended Citation
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.
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