摘要
在乌梁素海八排干中种植不同类型的湿地植物,探究表流湿地对外源污染控制的作用机制。基于2013年八排干的12个监测断面5月、7月、9月、11月的监测数据,分析湿地植物对农田退水中总氮和总磷的削减过程,对比不同水生植物配置下的湿地对营养盐的削减效率。结果显示,营养盐浓度沿排干水流方向逐渐降低,人工湿地对总氮和总磷的平均削减幅度分别达到22.5%和21.6%,说明水生植被对营养盐有很好的削减作用。对营养盐的削减效率总体上呈现季节性变化,为7月>9月>5月>11月,这与植被生长和代谢活动规律一致。削减效率沿水流方向逐渐减小的趋势,不同植被种植段对营养盐的削减效率也呈现差异性变化。本研究可为湖泊外源污染控制提供参考。
By planting different types of wetland plants in the 8th Drainage Canal of Ulansuhai Lake,we constructed surface flow wetland to reveal control mechanism of lake exogenous pollutants.Monitoring data from 12 sampling sites in May,July,September and November of 2013 were used to analyze the purification processes and efficiency of total nitrogen（TN）and total phosphorus（TP）.Purification efficient induced by different aquatic plants configurations were compared to reveal the best configuration for external pollutants reduction.Results show that nutrient concentrations decreases along with the flow direction in the drainage.The average reduction rate of TN and TP are 22.5%and 21.6%,indicating good purification effects of aquatic plants.The overall purification efficiency of the constructed wetland presents seasonal variations（July September May November）,which is consistent with the growth and metabolic activities of aquatic plants.Although purification efficient decreases with the direction of water flow,there are still some abnormal changes in different configuration segments.We hope that the current study may serve as a reference for lake exogenous pollutants control.
出处
《中国农村水利水电》
北大核心
2015年第3期64-67,共4页
China Rural Water and Hydropower
基金
国家自然科学基金资助项目(51409144)
中央公益性科研院所专项资助项目(CAFINT2012C09)
关键词
农业污染
人工湿地
削减效率
乌梁素海
exogenous pollutants
constructed wetland
purification efficiency
Ulansuhai Lake
作者简介
作者简介：毛旭锋（1981-），男，博士，主要研究方向为湿地生态过程。E-mail：maoxufeng@yeah．net。
