暗管排水条件下人工湿地的环境效应分析

摘要

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:1,in the indoor artificial wetlands trials,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.