Characteristics of Water Quality Change and Analysis of Pollution Sources in Poyang Lake——A Case Study of the Wuhufenchang State-controlled Section
Wuhufenchang state-controlled section is one of the five major sections in the Nanchang area of Poyang Lake.In view of the high concentration of total phosphorus(TP)in the dry season in the Poyang Lake Basin since 2020,this study takes Wuhufenchang state-controlled section as a case study to analyze the current water quality in the section based on monthly monitoring and inten-sive monitoring data.The monthly monitoring results showed that the spike in TP concentration ap-peared in December,and the average TP concentration in 2021 was higher than that in 2020.Ac-cording to the intensive monitoring results from November 2021 to August 2022,the problem of wa-ter quality in the section is still the high TP concentration in the dry season.The main sources of TP discharge are scattered,mainly agricultural planting sources(48.25%),followed by endogenous release(18.05%),living sources(17.04%),dry and wet deposition(13.55%).The large con-tributor to TP discharge amount is Lianwei Town,accounting for 41.59%of the total discharge a-mount in the catchment area,followed by Chengxin Farm and Henghu Reclamation Farm,with their integrated emissions accounting for nearly half of the total.Chengxin Farm and Lianwei Town,with the highest TP discharge,are the key areas for management,followed by Henghu Reclamation Farm,which mainly focuses on agricultural planting,and also need corresponding governance meas-ures.Based on this,this study proposes corresponding measures to improve(stabilize)water quali-ty,so as to ensure that the water quality of the section can meet the national control assessment dur-ing the"14th Five Year Plan"period,and provide technical support for the improvement of water environment quality in the section of Wuhufenchang section and even in the Poyang Lake basin.
Poyang LakeWuhu Branchstate control sectiontemporal and spatial variation char-acteristics of water qualitypollution source analysis
国家科技期刊平台
NSTL
万方数据
