环境工程学报2011，Vol.5Issue(5)：1194-1200,7.
香溪河流域土地利用格局演变对非点源污染的影响研究
Simulation of the effect of land use/cover change on non-point source pollution load in Xiangxi River watershed
摘要
Abstract
The non-point source pollution(NPS) loads of different land use scenarios were simulated with the SWAT model to determine the relationship between land use and NPS in the paper. The results showed that the NPS loads of four land use scenarios decreased on the whole, and the resulted average annual TN loads were 1 841.60 t,824.86 t,1790.33 t and 1424.55 t, respectively. The changes in the NPS loads agreed well with that of the cultivated land area on the watershed, but contrary to changes of the forest area. For example, in the process of the changes in land uses from the scenario 1 ( 1980 a) to scenario 2 ( 1995 a), the cultivated land rate decreased by 5.61％ and the forest cover rate increased by 5.70％, but the NPS loads decreased by 55.21％. From the viewpoint of spatial analysis, the most serious region of unit area NPS pollution was located at the sub-basin along the major rivers where the main landscape is cultivated land. So, it is necessary to optimize land use structure to reduce the NPS pollution.关键词
土地利用/非点源污染/SWAT/情景模拟Key words
land-use/ non-point source pollution/ SWAT/ scenario simulation分类
资源环境引用本文复制引用
王秀娟,刘瑞民,宫永伟,沈珍瑶..香溪河流域土地利用格局演变对非点源污染的影响研究[J].环境工程学报,2011,5(5):1194-1200,7.基金项目
环保公益性行业科研专项(200709024) （200709024）
