塘堰湿地对农田排水氮磷净化效果的影响研究  

Effects of Pond Wetland on Removing TN&TP from Farmland Drainage

作　　者：牟军[1] 崔远来[1] 赵树君[1] 许亚群 刘方平 

机构地区：[1]武汉大学水资源与水电工程科学国家重点实验室,武汉430072 [2]江西省灌溉试验中心站,南昌330201

出　　处：《灌溉排水学报》2015年第8期27-31,共5页Journal of Irrigation and Drainage

基　　金：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)

摘　　要：分析了不同湿地植被、不同水滞留时间、不同湿地水位以及不同稻田湿地面积比等对湿地净化效果的影响。结果表明,不同生育期各种湿地植被对农田排水中氮磷的去除效果各有差异,对农田排水中氮磷去除效果较好的湿地植被为茭白、高杆灯芯草、莲藕和西伯利亚鸢尾。适宜湿地水滞留时间为3-4d,稻田排水进入湿地后的第4天,各湿地植被对总氮的平均去除率分别为71.8%、83.9%、68.6%、80.2%,对总磷的平均去除率分别为69.3%、77.0%、57.5%、68.5%。塘堰湿地日常水深以40cm为宜。当地气象条件下,为确保污染负荷不超过塘堰湿地承载上限,平水年稻田湿地面积比以8.6为宜。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 3 to 4 days, after drainage into wetlands for 4 days, 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 8.6 in normal year.

关 键 词：塘堰湿地 氮 磷 去除率 

分 类 号：X712[环境科学与工程—环境工程] X52