东洞庭湖区域非点源农业污染负荷评估

在我国,规模农业面源污染已成为影响湖泊流域水环境质量与环境状况的重要原因之一.本文通过相关污染系数与污染源统计的方法对东洞庭湖流域的非点源污染总量与污染负荷进行了估算,分别对农田、生活、畜禽养殖、水产养殖等不同类型非点源污染源的污染负荷进行了计算.研究结果表明,畜禽养殖和生活污染是东洞庭湖流域非点源污染的主要负荷来源,特别是畜禽养殖的TN、TP、COD污染负荷占该区域总污染负荷的63.1%、82.2%、62.5%,其次是城市和农村生活污染负荷.今后东洞庭湖区域应将畜禽养殖业以及生活污染作为该区域非点源污染控制的重点对象,并完善相关农业环境保护政策.

Estimation of the Agricultural Non-Point Source Pollution Loads of Eastern Dongting Lake Region

The scale agriculture noodles source pollution has become one of the important factors of influencing eastern river valley water in Dongting Lake environment quality.By use of viable method to carry on to estimate non-point source pollution of the eastern Dongting Lake region,farmland-life-livestock farming and marine products farming were computed respectively to the pollution load.The related calculation result expresses that the TN,TP and COD of livestock farming pollution load were 63.1%,82.2% and 62.5% respectively.Secondly is living pollution load.From now on,in Eastern Dongting Lake district,livestock farming industry and life’s polluting will become key elements to control non-point source pollution.And agriculture environmental protection policy should be perfected.