Analysis on the Pollutant Concentration and Sea-Enter Flux from the Main Rivers Flowing into the Sea in Qinhuangdao City
Rivers flowing into the sea are an important pathway for land-based pollutants to enter the sea.Shihe River,Yanghe River,Tanghe River,Daihe River,and Yinma River are the five main rivers that flow into the sea in Qinhuangdao City,and their estuaries are all equipped with monitoring sections.Based on the monitoring section data of estuaries from 2018 to 2020,this paper analyzes the monthly variation of pollutant concentration and annual variation of sea-enter flux in five rivers flowing into the sea.The monitoring results show that from June to August 2020,the overall ammonia nitrogen concentration was slightly higher than other months;the overall concentration of Total Phosphorus(TP)during the dry season is lower than that during the wet season,while the overall concentration of Total Nitrogen(TN)during the dry season is higher than that during the wet season.From the perspective of pollutant flux into the sea,TN and chemical oxygen demand(CODCr)are the pollutants with high emissions into the sea.Among the 5 rivers that flow into the sea,Yanghe River contributes 59.7%of CODCr,48.5%of TP,54.6%of TN,and 42.1%of fluoride.The water volume of rivers is the main factor affecting the total amount of pollutants.
rivers flowing into the seapollutantsconcentrationsea-enter fluxQinhuangdao City
国家科技期刊平台
NSTL
万方数据
