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《Journal of Irrigation and Drainage》 2015-08
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Effects of Pond Wetland on Removing TN&TP from Farmland Drainage

MOU Jun;CUI Yuanlai;ZHAO Shujun;XU Yaqun;LIU Fangping;State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University;Jiangxi Province Irrigation Experiment Station;  
The impacts of different wetland plants,different hydraulic detention time,different wetland water depth and different paddy wetland area ratio on removal of wetlands were studied.Results showed that the removals of nitrogen and phosphorus of wetland plants from farmland drainage varied at different growth stages,and Zizania latifolia Turcz,bulrush,lotus and Siberian Iris had good removals of nitrogen and phosphorus from farmland drainage in Poyang Lake basin.Suitable wetland hydraulic detention time was 3to 4days,after drainage into wetlands for 4days,Zizania latifolia Turcz、bulrush、lotus and Siberian Iris had the average TN removals of 71.8%,83.9%,68.6%,80.2%,and the average TP removals of 69.3%,77.0%,57.5%,68.5%.The wetlands general suitable water depth was 40 cm.Under local weather conditions,to ensure that pollution load did not exceed the bearing caps of wetlands,the proper wetland paddy area ratio was 8.6in normal year.
【Fund】: 水利部948项目(201229);; 高等学校博士学科点专项科研基金项目(20130141110014);; 中美国际合作项目(20111017)
【CateGory Index】: X712;X52
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