海河流域氮磷面源污染空间特征遥感解析

以MODIS遥感数据为驱动，采用以遥感像元为基本模拟单元的DPeRS（Diffuse pollution estimation with remote semsing）面源污染负荷估算模型，分析了2016年海河流域氮磷面源污染空间分布特征，并对“十三五”《重点流域水污染防治规划》中划定的海河流域172个控制单元进行面源污染优先控制单元分析.结果表明，2016年海河流域总氮（TN）排放量为13.62万t，入河量为2.53万t；总磷（TP）排放量为8152t，入河量为1597t；空间分布上，海河流域中部和南部地区氮磷面源污染较重，其中河北省片区氮磷面源污染物排放量及入河量最大；农田径流型是海河流域氮磷面源污染的主要类型，其次城镇径流影响也较大；筛选出海河流域TN和TP面源污染优先控制单元分别为127和131个，面积占比分别为84.2%和87.0%.

Spatial character analysis on nitrogen and phosphorus diffuse pollution in Haihe River Basin by remote sensing

Driven by the MODIS data, DPeRS (Diffuse pollution estimation with remote sensing, DPeRS)model was used to analyses the spatial characteristic of nitrogen and phosphorus diffuse pollution in Haihe River basin on pixel scale in 2016. In Watershed Water Pollution Control Planning of the 13th Five-Year Plan published by MEE, PRC (Ministry Ecology and Environment of People's Republic China), 172 control units were defined. Here the priority control units (PCU) in Haihe River Basin were analyzed. In 2016, the total discharge of total nitrogen (TN) was 2.53×10⁴ ton with the total production being 13.62×10⁴ ton, the total phosphorus (TP) was 1597 ton with the total production being 8152 ton. The nitrogen and phosphorus diffuse pollution was relatively serious in the central and southern areas of Haihe River Basin, and the max amount of production and discharge of pollutants were appeared in Hebei province. Agriculture was the most important source for nitrogen and phosphorus diffuse pollution, followed by urban runoff. The numbers of PCU to TN and TP were 127 and 131 respectively, which covered the areas of Haihe River Basin 84.3% and 87.0% respectively.