农业环境科学学报2013，Vol.32Issue(4)：827-837,11.DOI:10.11654/jaes.2013.04.025
基于实测资料的输出系数分析与陕西沣河流域非点源负荷来源探讨
Analysis on Export Coefficients Based on Measured Data and Study on the Sources of Non-point Load for Fenghe River Watershed in Shaanxi Province, China
摘要
Abstract
The suitable export coefficients of NH4+-N,TP and COD for Fenghe River watershed in Shaanxi Province were determined by comparing the load given by improved export coefficient model with that calculated by the mean concentration method based on measured data at Qinduzhen section from 2001 to 2009.The results showed that the export coefficient model considering the transport lose in watershed had low relative error,less than 15％ for COD load,13％ for TP and 14％ for NH4+-N load.That was to say,the given values of the export coefficients and transport lose parameter were suitable for this watershed.The sources of the non-point pollution in Fenghe River watershed were analyzed with export coefficient model considering the transport lose,and it could be concluded that the domestic pollution of local people and cultivated land has great contribution to non-point pollution,and there was an roughly increasing trend in the last ten years.In detail,the cultivated land accounted for 37.87％,37.74％ and 15.56％ of non-point TN,NH4+-N and TP load in this watershed respectively,and domestic pollution contributed 40.73％,41.06％,61.19％ and 21.98％ to non-point TN,NH4+-N,TP and COD load respectively.In addition,Livestock breeding produced the non-point load for COD as high as 73.49％.Therefore,the control and management of pollution from cultivated land,domestic sewage and livestock breeding could effectively reduce the output of non-point source load in this watershed.关键词
非点源污染/输出系数法/实测数据/负荷来源/沣河流域Key words
non-point pollution/ export coefficient model/ measured data/ load sources/ Fenghe River watershed分类
资源环境引用本文复制引用
杜娟,李怀恩,李家科..基于实测资料的输出系数分析与陕西沣河流域非点源负荷来源探讨[J].农业环境科学学报,2013,32(4):827-837,11.基金项目
国家水体污染控制与治理科技重大专项河流主题,渭河水污染防治专项技术研究与示范课题(2009ZX07212-002) （2009ZX07212-002）
国家自然科学基金项目(50909080) （50909080）
陕西省自然科学基金项目(2009JQ7008) （2009JQ7008）
