安徽农业大学学报2012，Vol.39Issue(6)：955-960,6.
无锡市不同土地利用类型非点源污染负荷变化分析
Changes of non-point pollution loads of different land-use types in Wuxi city
摘要
Abstract
Supported by RS and GIS technology, non-point source pollution loads of different land use types in Wuxi city, which have problems of serious non-point source pollution, were estimated using SCS (soil conservation service) curve equation and USLE (unversal soil loss equation) equation. The changes of contribution rates of different land use types to total non-point source pollution load were analyzed. The results were as follows. Firstly, from year 2000 to 2008, total nitrogen load and total phosphorus load increased 4,75%, 3.28% correspondingly. Secondly, different land use types had different contributions to non-point source pollution load in total and per area. Contribution rates of farmland and construction land were more than 90% in total; while in per area, successively, rural construction land, farmland and urban construction land contributed mostly to total nitrogen load, but rural construction land, farmland and woodland to total phosphorus load. Finally, contribution rates of different land use types to total non-point source pollution load had been changing. Urban construction land was the most outstanding, which contribution rates rose by 21% and 17.4% to the total nitrogen load and total phosphorus load, respectively, while those of rural construction land decreased by 22.3% and 19.9% correspondingly ; farmland decreased slightly, and woodland, wasteland and water rose slightly.关键词
无锡市/非点源污染/SCS/USLEKey words
Wuxi city/ non-point source pollution/ SCS/ USLE分类
资源环境引用本文复制引用
赵冰雪,夏敏,王雷,班伟,姜海..无锡市不同土地利用类型非点源污染负荷变化分析[J].安徽农业大学学报,2012,39(6):955-960,6.基金项目
国土资源部公益性行业科研专项经费项目(200811087)和教育部博士点基金(200803071013)共同资助. （200811087）
