[Phosphorus removal efficiency of Yaonigou constructed wetland on Fuxian lakeshore].

To mitigate and control the eutrophication of the waters in Fuxian Lake bay, 1 hm2 Yaonigou constructed wetland was built on the north Fuxian lakeshore, and the P removal of the wastewater from Yaonigou River was investigated by the techniques of precipitation pond, oxidation pond, and subsurface-and surface flow constructed wetland. The results demonstrated that this constructed wetland had a very strong capacity (7.8% - 81.1%) of total phosphorus (TP) removal. The average removal rate of TP was 54.9%, and the TP retention in the constructed wetland was 265mg x m(-2) x d(-1), of which, plant assimilation was 26.1 mg x m(-2) x d(-1), about 10% of the total. The TP removal was mainly through adsorption and sedimentation, but the seasonal growth dynamics of main plant Oenanthe javanica could have a definite effect on the efficiency of TP removal. During the examination, the TP retention capacity was in order of subsurface flow constructed wetland > oxidation pond > precipitation pond > surface flow constructed wetland.