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基于AnnAGNPS模型的大宁河流域泥沙输移比评价
引用本文:花利忠,贺秀斌,颜昌宙,韦杰,南宏伟.基于AnnAGNPS模型的大宁河流域泥沙输移比评价[J].水土保持通报,2009,23(3):154-158.
作者姓名:花利忠  贺秀斌  颜昌宙  韦杰  南宏伟
作者单位:花利忠(中国科学院城市环境研究所,福建,厦门,361021;中国科学院水利部成都山地灾害与环境研究所中国科学院生态环境研究中心,北京,100085);贺秀斌,韦杰,南宏伟(中国科学院水利部成都山地灾害与环境研究所,四川,成都,610041);颜昌宙(中国科学院城市环境研究所,福建,厦门,361021) 
基金项目:国家973项目,中国科学院知识创新工程重要方向项目,国家自然科学基金课题,中国科学院西部行动计划项目 
摘    要:选择三峡库区大宁河流域为研究区,基于流域土地利用、土壤、地形及11个气象站8 a气象数据等资料,利用分布式流域评价模型-AnnAGNPS研究了流域泥沙输移特性.结果表明,大宁河流域多年平均输沙量自上游巫溪站的1.25×106t/a,沿程递增至大昌站的1.81×106t/a,大昌站以下增加缓慢,到流域出口为1.95×106t/a;东溪河和巫溪站以下至大昌站的大宁河干流左岸区间是两大产沙集中区;全流域SDR值为0.30,各子流域SDR值变化范围为0.376~0.531,与相关文献研究结果一致;干流控制站SDR值与流域站点控制面积呈负相关关系(r2=0.73),但这种关系在各支流上不明显,这是由于各子流域地形、土壤、土地利用和降雨量空间异质性都很大,表明对于不同的流域,仅用SDR值与流域面积关系无法确切计算其SDR值.

关 键 词:AnnAGNPS模型  泥沙输移比  三峡库区  大宁河流域
收稿时间:2008/1/23 0:00:00
修稿时间:2008/11/11 0:00:00

Assessment of Sediment Delivery Ratio in Daning River Watershed Based on AnnAGNPS Model
HUA Li-zhong,HE Xiu-bin,YAN Chang-zhou,WEI Jie and NAN Hong-wei.Assessment of Sediment Delivery Ratio in Daning River Watershed Based on AnnAGNPS Model[J].Bulletin of Soil and Water Conservation,2009,23(3):154-158.
Authors:HUA Li-zhong  HE Xiu-bin  YAN Chang-zhou  WEI Jie and NAN Hong-wei
Affiliation:Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, Fujian 361021, China;Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, Sichuan 610041, China3. Research Center for Eco-envieonmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, Sichuan 610041, China3. Research Center for Eco-envieonmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, Fujian 361021, China;;Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, Sichuan 610041, China3. Research Center for Eco-envieonmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, Sichuan 610041, China3. Research Center for Eco-envieonmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
Abstract:Annualized Agricultural Non Point Source model(AnnA GN PS),a continuo us simulation model at water shed scale,simulates surface water,sediment,nut rients,and pesticides leaving the cells and their transport through watershed.The Daning River water shed is selected as a study case.The characteristics of sediment delivery are studied based on landuse,soil,topographic data,and eight year climatic data from 11 meteorological stations.Averaged annual sediment load is 1.25×106t/a at the Wuxing station,rapidly rises up to 1.81×106t/a at the Dachang station,and reaches 1.95×106t/a at the water shed outlet.Xixi River,one of the biggest tributaries in the Daning River watershed,has the largest volume of water discharge up to 20.97%of the total at the watershed outlet.Dongxi River,the second tributary,has the most sediment load up to 26.88%of the total at the watershed outlet.In addition,the area of left bank in the middle watershed(from Wuxi station to Dachang station)is another large sediment source.The sediment delivery ratio(SDR)of the whole watershed is 0.30 in accordance with published references.Viewed from four main stream stations,i.e.Do ngxi river outlet,Wuxi station,Dachang station,and the watershed outlet,the SDR is positively correlated with the watershed area.However,the relation is not significant in the six tributaries owing to the high variatio ns of drainage area,slope,runoff rainfall facto rs,land use/ land cover,etc.
Keywords:AnnAGNPS model  sediment delivery ratio  Three Gorges Reservoir region  Daning River watershed
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