降雨径流对大连复州河流域氮磷变化影响研究

Study on the influence of rainfall runoff on the change of nitrogen and phosphorus in Fuzhou River basin in Dalian

本文基于2019年8月大连地区强降雨事件,对径流量、降雨量以及氮磷浓度进行同步监测,分析降雨径流对复州河流域氮磷元素变化特征、迁移规律以及污染的影响。结果表明:氮磷元素在降雨初期随冲刷作用迁移,降雨后期总磷随侵蚀泥沙再次迁移,总氮则随壤中流迁移;氮磷通量主要受径流量影响,降雨径流是氮磷污染负荷的主要驱动力。该研究旨在为复州河流域氮磷面源污染防控提供科学依据。

Based on the heavy rainfall event in Dalian in August in 2019,the runoff,rainfall and nitrogen and phosphorus concentration were monitored synchronously,and the influence of rainfall runoff on the change characteristics,migration law and pollution of nitrogen and phosphorus elements in Fuzhou River basin was analyzed.The results show that:nitrogen and phosphorus elements migrate with erosion in the early stage of rainfall,total phosphorus migrates again with erosion sediment in the late stage of rainfall,and total nitrogen migrates with loam flow.Nitrogen and phosphorus fluxes are mainly affected by runoff,and rainfall runoff is the main driving force of nitrogen and phosphorus pollution load.This study aims to provide scientific basis for the prevention and control of nitrogen and phosphorus non-point source pollution in Fuzhou River basin.