IMHE OpenIR  > 山地表生过程与生态调控重点实验室
Assessment of Runoff and Sediment Yields Using the AnnAGNPS Model in a Three-Gorge Watershed of China
Language英语
Lizhong Hua; Xiubin He; Yongping Yuan; Hongwei Nan
Corresponding AuthorXiubin He
2012
Source Publication8th International Symposium on Recent Advances in Environmental Health Research ; INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
Conference Date2011-9-18~21
Conference PlaceJackson, MS
Funding OrganizationJackson State Univ (JSU); Natl Inst Hlth, RCMI-Ctr Environm Hlth; U S Dept Educ, Title III Grad Educ Program; U S Environm Protect Agcy; JSU Off Acad Affairs; JSU Off Res & Fed Relat
AbstractSoil erosion has been recognized as one of the major threats to our environment and water quality worldwide, especially in China. To mitigate nonpoint source water quality problems caused by soil erosion, best management practices (BMPs) and/or conservation programs have been adopted. Watershed models, such as the Annualized Agricultural Non-Point Source Pollutant Loading model (AnnAGNPS), have been developed to aid in the evaluation of watershed response to watershed management practices. The model has been applied worldwide and proven to be a very effective tool in identifying the critical areas which had serious erosion, and in aiding in decision-making processes for adopting BMPs and/or conservation programs so that cost/benefit can be maximized and non-point source pollution control can be achieved in the most efficient way. The main goal of this study was to assess the characteristics of soil erosion, sediment and sediment delivery of a watershed so that effective conservation measures can be implemented. To achieve the overall objective of this study, all necessary data for the 4,184 km(2) Daning River watershed in the Three-Gorge region of the Yangtze River of China were assembled. The model was calibrated using observed monthly runoff from 1998 to 1999 (Nash-Sutcliffe coefficient of efficiency of 0.94 and R-2 of 0.94) and validated using the observed monthly runoff from 2003 to 2005 (Nash-Sutcliffe coefficient of efficiency of 0.93 and R-2 of 0.93). Additionally, the model was validated using annual average sediment of 2000-2002 (relative error of -0.34) and 2003-2004 (relative error of 0.18) at Wuxi station. Post validation simulation showed that approximately 48% of the watershed was under the soil loss tolerance released by the Ministry of Water Resources of China (500 t center dot km-2 center dot y(-1)). However, 8% of the watershed had soil erosion of exceeding 5,000 t center dot km(-2)center dot y(-1). Sloping areas and low coverage areas are the main source of soil loss in the watershed.
KeywordAnnagnps Modeling Daning River Watershed Three-gorge Erosion And Sediment
DOI10.3390/ijerph9051887
ISSN1660-4601
Indexed BySCI
WOS IDWOS:000304543200026
Citation statistics
Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type会议论文
Identifierhttp://ir.imde.ac.cn/handle/131551/6308
Collection山地表生过程与生态调控重点实验室
Recommended Citation
GB/T 7714
Lizhong Hua,Xiubin He,Yongping Yuan,et al. Assessment of Runoff and Sediment Yields Using the AnnAGNPS Model in a Three-Gorge Watershed of China[C],2012.
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