基于水文分割法的鄱阳湖入湖非点源污染研究

Study on non-point source pollution from rivers into Poyang Lake based on hydrological base flow segmentation method

为研究鄱阳湖流域非点源污染情况,选取鄱阳湖入湖主要河流为研究对象,利用各河流入湖控制站对流域径流量及水质进行同步监测,借鉴水文分割法的原理,应用非点源污染负荷估算公式,探求径流氮、磷负荷入湖规律。结果表明:2008年赣江、抚河、信江、饶河、修水等五河及博阳河、西河入湖氨氮和总磷的污染负荷(溶解态)为入湖非点源污染物的主要来源,占总入湖负荷的68%～76%;在空间分布上,入湖五河中赣江对入湖非点源污染负荷的贡献占绝对优势。根据分析结果,鄱阳湖的水污染治理应主要针对非点源污染,且重点在赣江流域。

In order to study the pollution condition of non - point sources pollution of Poyang Lake Basin, the main rivers into Poyang Lake are taken as research objects, the runoff and water quality at the controlling stations along the rivers were synchronously monitored, and by hydrological base flow segmentation method and non -point pollution load estimation formula, the loss laws of N and P in the Poyang Lake Basin are analyzed. The results show that the load of NH3 - N and TP from Ganjiang River, Fuhe River, Xinjiang River, Raohe River and Xiushui River and Boyanghe River and Xihe River are main sources of non - point sources pollution into the lake from upstream rivers, accounted for 68% - 76% of total influx load; as for the spatial distribution, the Ganjiang River has a dominant proportion. Therefore, the non - point sources pollution should be focused in the treatment of water pollution of Poyang Lake, and the Ganjiang River should be emphasized.