Water Quality Evaluation and Variation Characteristics of Temporal-spatial in Laoyu River Wetland
The water quality status of Laoyu River wetland in Kunming was monitored and evaluated in order to provide data support for improving the water environment of the wetland.In this paper,nine indexes including TN,TP,COD,Chla,NH3-N,pH,DO,T and S of 12 monitoring sections in Laoyu River wetland were analyzed in very month in 2022,and screened the main pollution indexes and evaluated the water quality of Laoyu River wetland by the principal component analysis.The results showed that the principal component analysis comprehensively evaluated that the water quality in December was the best and the worst in June.After the water flowed through Laoyu River wetland purification,other sampling sites relative to the inlet site 11,TP and TN reduction rate ranged from 10.73%to 61.22%and 2.20%to 34.04%in different space,wetland purification effect was better,the water quality of Laoyu River wetland was inferior to class V.Nitrogen and phosphorus were the limiting nutrient element in Laoyu River wetland,phosphorus was the most important limiting factor of water eutrophication,and agricultural surface source and point source but without the pollutant collection were the main factor affecting the wetland water quality.
Laoyu River wetlandwater quality indexPearson correlationprincipal component analysis
NETL
NSTL
万方数据
