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《Journal of Anhui Agricultural Sciences》 2009-28
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Identification of Critical Nonpoint Pollution Source Areas In Songhuaba Watershed

HE Cheng-gang et al(Asian International Rivers Center,Yunnan University,Kunming,Yunnan 650091)  
USLE model were used as a method of identification Songhuaba watershed non-point source pollution of the key source region.DEM, land use,rainfall and soil type database were utilized to calculate the various impact factors of USLE model and annual soil loss.The results showed that the non-point source pollution in high-risk areas mainly concentrated in the Muyang River catchment area,its control area of 1.61%; and in Lengshui River and the Songhuaba Reservoir the proportion of the catchment areas were smaller,respectively of its control area of 0.39% and 0.19%.In the process of governance the water quality in Songhuaba Basin,formulated a reasonable science planning measures aimed to critical source areas.
【Fund】: 云南省教育厅基金(07J51432);; 国家重点基础发展研究计划(2003CB415105)资助
【CateGory Index】: X524
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