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A spatially invariant sediment rating curve and its temporal change following watershed management in the Chinese Loess Plateau
Zheng, Mingguo
2018-07-15
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
ISSN0048-9697
Volume630Pages:1453-1463
Corresponding AuthorZheng, Mingguo(zhengmg.04b@igsnrr.ac.cn)
AbstractSediment rating curves have long been used as a tool for predicting sediment yield. In this study, the spatial and temporal variations of rating curves were examined in the loess area (-15,000 km(2)) of the Wuding River basin of the Chinese Loess Plateau. Data of mean daily water discharge per unit area, (2,1(1113 S-1 km(2)), and mean daily sediment discharge per unit area, SDd (kg s(-1) 1(1112), were compiled for three periods of 1959-1971, 1972-1989, and 2006-2013. Soil conservation measures were rarely implemented for the pre-1971 period but were intensively implemented for the latter periods. The proportional function, i.e. SDd CdQd, fitted the rating curve well for all periods. The coefficient, Cd, is an approximation of the mean sediment concentration of surface runoff (MSCsR). Contrary to the usual belief, Cd was ca. 730 kg m 3 whatever the location for the pre-1971 period; examinations at the instantaneous and the event. time scales further demonstrated the spatial invariant MSCsR across six orders of magnitude in drainage area sizes (from 0.006 up to 3893 km(2)). The spatial invariant MSCsR forms as a result of the ready availability of mass-wasted materials in headwaters and holds on as a result of the minimal in-stream erosion and sedimentation along the stream channel. For the post-1971 periods, both Cd and its spatial invariability decreased in a non-monotonous way, which was related to the check-clam (i.e., sediment. trapping dams) constructions but not to the implementation of revegeLalion and terracing measures. As a result, the non-monotonous temporal trends act and its spatial coefficient of variation both captured the intermittency of the check-dam construction well. Temporal changes in MSCsR or the sediment rating curve, which is less disturbed by rainfall, provides important insights into anthropogenic impacts on river systems. (C) 2018 Published by Elsevier B.V.
KeywordSediment rating curve Spatial pattern Soil conservation Sediment concentration Human activities
DOI10.1016/j.scitotenv.2018.02.323
WOS KeywordYELLOW-RIVER BASIN ; SUSPENDED SEDIMENT ; HILLY AREAS ; MEDITERRANEAN ENVIRONMENTS ; TRANSMISSION LOSSES ; YANGTZE-RIVER ; LAND-USE ; YIELD ; SCALE ; TRANSPORT
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[41671278] ; National Natural Science Foundation of China[41401302] ; Key Laboratory of Soil and Water Loss Process and Control on the Loess Plateau of Ministry of Water Resources[2016002]
Funding OrganizationNational Natural Science Foundation of China ; Key Laboratory of Soil and Water Loss Process and Control on the Loess Plateau of Ministry of Water Resources
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000432467700143
PublisherELSEVIER SCIENCE BV
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Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/54833
Collection中国科学院地理科学与资源研究所
Corresponding AuthorZheng, Mingguo
AffiliationChinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China
Recommended Citation
GB/T 7714
Zheng, Mingguo. A spatially invariant sediment rating curve and its temporal change following watershed management in the Chinese Loess Plateau[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2018,630:1453-1463.
APA Zheng, Mingguo.(2018).A spatially invariant sediment rating curve and its temporal change following watershed management in the Chinese Loess Plateau.SCIENCE OF THE TOTAL ENVIRONMENT,630,1453-1463.
MLA Zheng, Mingguo."A spatially invariant sediment rating curve and its temporal change following watershed management in the Chinese Loess Plateau".SCIENCE OF THE TOTAL ENVIRONMENT 630(2018):1453-1463.
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