Analysis of water purification effect of multi-level composite constructed wetlands in northern China:Taking the Black Soil Wa Wetland of Guanting Reservoir as an Example
In order to systematically explore the water quality purification effect of multi-level compos-ite artificial wetlands in northern low-temperature areas,this study takes the demonstration project of the Guanting Reservoir Heituwa Wetland System as an example,selects 14 years of water quality monitoring data from 2008 to 2021,analyzes the overall purification effect of the wetland system,and compares and analyzes the purification effect of stable ponds and artificial wetlands,as well as the purification effect of surface flow wetlands and subsurface flow wetlands.Research shows:The removal rates of TN,NH3-N,NO3-N,TP,orth-P,BOD5 and CODMnwere 53％o,59％,52％,41％,39％o,49％and 21％,respectively.The removal rates of various chemical indexes fluctuated with seasons,and the purification effect was better in warm period than in cold period;The removal efficiency of TP and orth-P in stabilization pond was better than that in constructed wetland.The removal efficiency of BOD5,CODMn and N in constructed wetland was better than that in stabilization pond;Compared with surface flow wetland,subsurface flow wetland has bet-ter removal effect on BOD5,CODMn and N,but less removal effect on P.The research results can provide refer-ence for the construction and operation of wetland systems in northern low-temperature areas.
multi level composite artificial wetlandoperation managementpurification effect
国家科技期刊平台
NSTL
万方数据
