The Purifying Effect of Artificial Wetland on Water Nitrogen and Phosphorus Pollutant in Huangshui River of Xining
Constructed wetland construction is an important ecological optimization measure in the process of north urbanization.As an important component in urban ecosystem,it plays an important ecological service function in purifying and regulating water quality.In order to investigate the ecological effects of the construction of plateau urban constructed wetland on the improvement of water quality and the reduction of nitrogen and phosphorus pollutant load,it's mainly monitored from June to November on the seasonal variation characteristics of nitrogen and phosphorus pollutant concentrations at different sections of Huoshaogou wetland,Haihu wetland and Beichuan wetland in Xining,Qinghai Province.The result shows that:(1)The peak of the pollutant concentration in Huoshaogou wetland appears in the low water season,but the concentration is lower generally in the high water season,and the pollutant concentration in Haihu wetland and Beichuan wetland are higher in the high water season.(2)Wetlands have a certain reduction effect on the load of major pollutants in water body,which is mainly reflected in the removal effect of Total Nitrogen(TN),Total Phosphorus(TP),Chemical Oxygen Demand(CODCr)and Permanganate Index(CODMn)of Haihu wetland and Beichuan wetland.The reduction rates on these of Haihu wetland are 11.74%,29.32%,41%and 25.19%,respectively.The reduction rates on these of Beichuan wetland are 25.02%,54.71%,32.03%and 1.91%,respectively.Additionally,the average content of TN,TP,CODCr and CODMn in the water from the three wetlands reaches the standard of Class Ⅱ water generally.The concentration of CODCr in Huoshaogou wetland and Beichuan wetland reache to Class Ⅰ water standard,while the concentration of CODMn in Haihu wetland is higher,which belongs to Class Ⅲ water standard.(3)Through correlation analysis of water quality indexes,it is found that TP is highly correlated with pH,precipitation and temperature,and TN is highly correlated with CODCr.
Plateau cityHuangshui National Wetland ParkWater pollutionWater purificationWetland restoration
NETL
NSTL
万方数据
维普
