水体流域有机污染物非点源时空差异性特征研究

Analysis of Spatiotemporal Differences in Non-point Sources of Organic Pollutants in Water Basins

有机污染物通常来自于多种不同的非点源污染,各个非点源污染的特征、分布和颗粒物质运动路径等方面的差异性使得分析非点源污染物的时空特征更加复杂。因此,此研究采集了九龙江流域2020年-2023年的水文数据;通过径流曲线数法计算九龙江流域的地表径流量,并作为水质模型输入项,计算氮和磷的浓度;利用水量水质耦合模型对有机污染物非点源污染时空差异性特征展开分析。分析结果如下:从时间角度看,研究区域有机污染物非点源污染集中在6月份出现;从空间角度来看,上游有机污染物非点源污染负荷低于中游和下游。

Organic pollutants usually come from various types of non-point source pollution,and the differences in characteristics,distribution,and particle transport pathways of each non-point source pollution make analyzing the spatiotemporal characteristics of non-point source pollutants more complex.Therefore,this study collected hydrological data from the Jiulong River Basin from 2020 to 2023;Calculate the surface runoff of the Jiulong River Basin using the runoff curve number method,and use it as an input for the water quality model to calculate the concentrations of nitrogen and phosphorus;Analyze the spatiotemporal differences in non-point source pollution of organic pollutants using a coupled model of water quantity and quality.The analysis results are as follows:From a temporal perspective,non point source organic pollutants in the study area are concentrated in June;From a spatial perspective,the non point source pollution load of organic pollutants in the upstream is lower than that in the midstream and downstream.