Assessment of Runoff and Sediment Yields Using the AnnAGNPS Model in a Three-Gorge Watershed of China

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

	Assessment of Runoff and Sediment Yields Using the AnnAGNPS Model in a Three-Gorge Watershed of China
	Hua, Lizhong 1,3; He, Xiubin1 ; Yuan, Yongping 2; Nan, Hongwei 1
	2012-05-01
会议名称	8th International Symposium on Recent Advances in Environmental Health Research
会议日期	2011 2011-9-18~21
会议地点	Jackson, MS
关键词	AnnAGNPS modeling Daning River watershed Three-Gorge erosion and sediment
卷号	9
期号	5
页码	1887-1907
通讯作者	He, Xiubin
英文摘要	Soil 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.
收录类别	SCI ; ISTP
会议主办者	会议赞助商:Jackson 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
会议录	INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
会议录出版者	MDPI AG, POSTFACH,
会议录出版地	MDPI AG, POSTFACH, CH-4005 BASEL, SWITZERLAND
语种	英语
ISSN号	1660-4601
WOS记录号	WOS:000304543200026
研究领域[WOS]	Environmental Sciences & Ecology
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
内容类型	会议论文
源URL	[http://ir.imde.ac.cn/handle/131551/9911]
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.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China 2.USEPA Off Res & Dev, Las Vegas, NV 89119 USA 3.Xiamen Univ Technol, Dept Spatial Informat Sci & Engn, Xiamen 361024, Peoples R China
推荐引用方式 GB/T 7714	Hua, Lizhong,He, Xiubin,Yuan, Yongping,et al. Assessment of Runoff and Sediment Yields Using the AnnAGNPS Model in a Three-Gorge Watershed of China[C]. 见:8th International Symposium on Recent Advances in Environmental Health Research. Jackson, MS. 2011 2011-9-18~21.