暗管排水条件下人工湿地的环境效应分析

Analysis of Environmental Effects of wetland with subsurface drainage

通过室内人工模拟湿地试验和野外湿地试验,分析了暗管排水条件下人工湿地的环境效应。结果表明:1、在室内人工模拟湿地试验中,除了池塘水流湿地对总氮的截留率只有33%以外,两种类型湿地对氮、磷的截留效率均在50%以上,且回形水流湿地对农业污染物的截留作用更为明显;2、在野外湿地试验中,5种湿地对水体全氮的平均去除率分别为42.2%、50.4%、61.5%、52.0%和63.5%,5种湿地对水体全磷的去除率分别为54.6%、60.1%、64.8%、61.9%和68.2%,5种湿地对全磷的去除率都在50%以上。通过综合分析可知,暗管排水条件下,人工湿地对氮元素和磷元素的去处效率都很高,有利于生态环境的保护。

Through indoor artificial wetlands tests and field wetland trials,This paper analyzes the environmen- tal effects of subsurface drainage under the artificial wetlands.The results show that：l, in the indoor artificial wetlands triMs,in addition to back-shaped water pond water wetlands TN rejection rate of only beyond 33%, the two types of wetlands for nitrogen and phosphorus retention efficiency above 50% ,and wetlands intercep- tion of agricultural pollutants is more obvious;2,in the field of wetland test,the average removal rate of five kinds of wetlands on water TN were 42.2% ,50.4% ,61.5% ,52.0% and 63.5% ,five kinds of wetlands on water total phosphorus removal rate was 54.6% ,60.1% ,64.8% ,61.9% and 68.2% ,five kinds of wetlands for total phosphorus removal rate above 50%.Through comprehensive analysis,under subsurface drainage ,wetland ideas efficiency of nitrogen and phosphorus are high, help protect the environment.