文档介绍：科类理工类
本科生毕业论文
弥苴河流域农村农业面源氮污染负荷调查研究
The Research of Rural Agricultural Nonpoint Source Nitrogen Pollution Load in Mi Ju River
弥苴河流域农村农业面源氮污染负荷调查研究
摘要
本文试通过对洱源县弥苴河流域七个监测断面水质总氮的跟踪监测分析,以及从流域农业面源不同污染类型的角度来揭示弥苴河农村地区各类典型河流氮污染特征,结果表明:(1)TN监测数据沿程变化且TN最高浓度一般会出现在枯水期,最低浓度会出现在丰水期;(2)从农业面源不同污染类型来看,农田化肥TN年排放量所占比重最大,人畜粪便TN年排放量所占比重次之,农田固废、农村生活垃圾、生活污水TN年排放量所占比重相对较小。其中人畜粪便污染在农业面源污染中贡献率最大;(3)从面源污染物结构(乡镇)不同污染类型来看,上游区的三营镇、茈碧湖镇,下游区右所镇、上关镇对弥苴河TN污染的贡献情况最大。
关键词:总氮;污水;垃圾;固废;水质
The Research of Rural Agricultural Nonpoint Source Nitrogen Pollution Load in Mi Ju River
College of Resources and Environment,Yunnan Agricultural University
ABSTRACT
This paper analyzed the total nitrogen of seven Monitoring Section’ water in Eryuan County Mi Ju river. And reveal all kinds of Characteristic of Nitrogen pollution in Typical river which located in Mi Ju River’s Rural areas from From the perspective of different agricultural non-point sources pollution types , the results show that: (1) TN monitor datas change along the way and the highest concentration of TN usually appears in the dry season, the lowest concentration in the wet period, 2) from From the perspective of different agricultural non-point sources pollution types, the largest Proportion is TN Year emissions of agricultural fertilizers , second the TN Year emissions of human and animal , and TN Year emissions of agricultural solid waste, rural solid waste, sewage have a relatively small proportion; And human and animal faecal contamination in agricultural pollution have the greatest contribution. (3) integrated agricultural pollution output, the upstream area of the three Ying Town, Xiaochaihu Avon town, the town the right lower area, the Town, on Miju Creek the largest contribution to the pollution situation in TN.
Key words:General nitrogen;Foul water ;Rubbish ;Solid waste ;Water quality
弥苴河流域农村农业面源氮污染负荷调查研究
1 引言
农村农业面源污染问题在我国农村环境污染中日益突出,面源污染的时空范围更广,不确定性更大,成分、过程更复杂,更难以控制。当前,在我国农业活动中,非科学的经管理念和落后的生产方式是造成农业环境面源污染的重要因素,这些污染源对环