Feng Ai-Ping, Wang Xue-Lei, Xu Yi, Huang Li, Wu Chuan-Qing, Wang Chang-Zuo, Wang Hong-Liang
Ministry of Ecology and Environment Center for Satellite Application on Ecology and Environment, Beijing 100094, China.
Beijing AutoAi Technology Co., Ltd., Beijing 100094, China.
Huan Jing Ke Xue. 2020 Oct 8;41(10):4555-4563. doi: 10.13227/j.hjkx.201912077.
Considering the Haihe River Basin as an example, the DPeRS model was used to analyze the spatial distribution characteristics and pollution sources of the diffuse pollution by remote sensing pixel scale. Combined with the evaluation standard of surface water quality, a potential risk grading method for diffuse pollution was constructed to assess the potential risk of diffuse pollution in Haihe River Basin. The results showed that, in 2016, the diffuse discharge loads of total nitrogen (TN), total phosphorus (TP), ammonia nitrogen (NH-N), and chemical oxygen demand (COD) were 429.2, 25.7, 288.3, and 1017.0 kg ·km, respectively, with the amount of river entry being 2.5×10 ton, 1597.2 ton, 1.7×10 ton, and 6.6×10 ton in Haihe River Basin, respectively. Farmland runoff is the most important source of diffuse pollution of TN, TP and NH-N in the Haihe River Basin. For COD index, urban life is the primary type of pollution, followed by livestock. The diffuse pollution is relatively severe in the central and southern areas of Haihe River Basin, and this area is also a high-risk concentrated distribution area of diffuse pollution in the basin. The distribution of high-risk areas of nitrogen-phosphorus diffuse pollution are relatively concentrated, and the chemical oxygen demand is relatively scattered. More than 36% of the Haihe River Basin has a nitrogen-phosphorus diffuse pollution risk, and 2.94% of the area has a chemical oxygen demand diffuse pollution risk.
以海河流域为例，采用DPeRS模型从遥感像元尺度分析面源污染的空间分布特征及污染源。结合地表水质评价标准，构建面源污染潜在风险分级方法，评估海河流域面源污染的潜在风险。结果表明，2016年海河流域总氮（TN）、总磷（TP）、氨氮（NH-N）和化学需氧量（COD）的面源排放负荷分别为429.2、25.7、288.3和1017.0 kg·km，入海量分别为2.5×10吨、1597.2吨、1.7×10吨和6.6×10吨。农田径流是海河流域TN、TP和NH-N面源污染的最重要来源。对于COD指标，城市生活是主要污染类型，其次是畜禽养殖。海河流域中南部地区面源污染相对严重，该区域也是流域面源污染高风险集中分布区。氮磷面源污染高风险区分布相对集中，化学需氧量分布相对分散。海河流域超过36%的区域存在氮磷面源污染风险，2.94%的区域存在化学需氧量面源污染风险。
