摘要
以北京市北运河流域为研究目标,对流域内各类非点源的污染负荷及其贡献率进行了系统的分析研究,并针对北运河流域内非点源污染的结构和空间分布特征提出了相应防治对策。结果表明:北运河流域农业非点源污染中CODcr的主要来源是生活污水,贡献率达到38%;氨氮的主要来源是种植业,贡献率达到43%;TN的主要来源是畜禽养殖,贡献率达到53%;TP的主要来源是畜禽养殖,贡献率达到74%。从污染负荷的空间分布看,流域内污染物排放量呈现出两头高中部低的空间分布特征,即下游通州区和上游昌平区非点源污染物排量明显高于其他区。
The Beiyunhe River Basin is selected as a case study.According to an analysis of data from statics and survey,the pollution load and the contribution rate of main non-point source pollution are fixed.This paper presents the corresponding pollution control measures to settle the major problems.Results show that the biggest contributor of CODcr pollution load is household refuse,accounting for 38%.The biggest NH＋4-N pollution load was agricultural production,accounting for 43%.Livestock breeding contributed the most to the pollution load of the area,and 53% to the TN and 74% to the TP.The pollution load of Tongzhou District and Changping District are significantly higher than that of other districts.
出处
《中国农村水利水电》
北大核心
2010年第8期30-33,共4页
China Rural Water and Hydropower
基金
国家水体污染控制与治理科技重大专项(2008ZX07209-002和2008ZX07209-004)
水利部公益基金项目(200901083)
关键词
北运河
农业非点源
污染类型
贡献率
Beiyunhe River Basin
non-point source pollution
pollution types
contribution rate
