基于小流域划分的拉林河流域农业非点源污染物入河量估算  

Estimation on Agricultural Non-Point Source Pollution Loads into the River of Lalin Catchment Based on Small Watershed Division

作　　者：汪雪格[1] 刘洪超[1] 吕军[1] 张正[1] 

机构地区：[1]松辽流域水资源保护局松辽水环境科学研究所,吉林长春130021

出　　处：《中国水土保持》2016年第10期65-67,共3页Soil and Water Conservation in China

摘　　要：针对拉林河流域土地利用类型及气候特点,将输出系数模型和GIS技术相结合,以小流域为计算单元,对拉林河流域的非点源污染负荷进行了计算。计算结果表明:流域内COD负荷为16 454.83 t/a、TP负荷为668.80 t/a、TN负荷为1 319.08 t/a;灌区退水对流域内非点源污染负荷的贡献相对较大,由灌区退水导致的COD负荷占总量的69.37%、TP负荷占总量的85.33%;子流域2、5、7、15是流域内水土流失非点源污染整治的重点区域。Aiming at the types of land use and the characteristics of climate of Lalin River catchment and takingsmall watershed as computational elements,the paper combined export coefficient model and GIS technique to calculate the non-point source pollution load of the catchment.The outcomes show that a) the COD load is 16 454.83 t/a,the TP load is 668.80 t/a,and the TN load is 1319.08 t/a;b) the contribution of recession of irrigated area is greater to the non-point source pollution load of the catchment.The COD load caused by recession of irrigated area makes up 69.37%of the total and the TP load makes up 85.33%of the total and;c) sub-basins 2,5,7 and 15 are the key areas of the catchment for non-point source pollution control and soil and water loss control.

关 键 词：非点源污染 输出系数模型 子流域划分 拉林河流域 

分 类 号：X52[环境科学与工程—环境工程]