Study on the Relationship Between Purification Effect and Vegetation Distribution of Reservoir Pond Wetland
With 263 reservoir pond wetlands in Erhai Lake Basin as the research object,this study discussed the purification effects of reservoir pood wetlands on nitrogen,phosphorus and organic matter,and the influence of vegetation distribution on the purification effect of reservoir wetlands.The results showed that the removal rates of TN and TP in farmland tail water,sewage tail water and river ectopic purification pond wetland were higher than that of COD,and the removal rates of TN,and TP in three functional types of reservoir pond wetlands were higher than that of COD.The purification effect of TP and COD in dry season were higher than that in rainy season.The vegetation types of reservoir pond wetland was single,and the emergent vegetation was the main vegetation.More than 70％of the reservoir pond wetland emergent vegetation coverage ranged from 25％to 75％.Invasive vegetation was widely distributed,with a total coverage of more than 11％.The number of species and coverage were positively correlated with the purification effect,and the effect of species and coverage on TP were greater than that of TN.The effect of vegetation coverage on TN and TP removal rate were greater than the number of species.
Erhai Lake Basinreservoir pond wetlandpurification effectvegetation distribution
万方数据
维普
