摘要
为探索上海地区生态沟渠不同布置方式对农田径流污染物拦截效果的影响,构建了2种不同布局的生态排水沟渠系统("一"字型和"弓"字型),针对2种不同径流进水污染物浓度(一般浓度和较高浓度)水平,对生态沟渠农田径流营养性污染物的截除效果开展了研究。结果表明:2种不同布置方式的生态沟渠对径流污染物均有较好的截除作用,对SS、TN、NH_4^+-N、TP的去除率分别在13%~28%,12%~41%,14%~47%,12%~55%之间,总体来看,"弓"字形生态沟渠对污染物的去除效果要优于"一"字形生态沟渠;一般浓度水平下,"弓"字形生态沟渠对SS、TN、NH_4^+-N、TP去除率分别比"一"字形高13.63%,27.49%,32.17%,11.98%;较高浓度水平下,"弓"字形生态沟渠对SS、TN、NH_4^+-N、TP去除率分别比"一"字形高10.71%,20.06%,25.86%,22.83%。最后,对生态沟渠相关应用与今后的研究提出了建议。
In order to explore the pollutant removal effects from agricultural runoff by ecological ditches in different formation,2 types of ecological ditches were established（ ＂一＂shape and＂弓＂shape） to compare their efficiency in pollutant removal from agricultural runoffs with 2 different inflow concentration levels（ normal concentration and higher concentration）. The results show： both two types of ecological ditches have good removal effects,and the removal rates of SS,TN,NH＋^4-N,TP are respectively 13% - 28%,12% - 41%,14% -47%,12% - 55%. In general,the removal efficiency of＂弓＂shaped ditch is better than＂一＂shaped one; under normal concentration level,the removal efficiency of SS,TN,NH4^＋- N,TP of ＂弓＂shaped ecological ditch are 13. 63%,27. 49%,32. 17%,11. 98% higher than＂一＂shaped one respectively; under higher concentration,the removal efficiency of SS,TN,NH4^＋-N,TP of ＂弓＂shaped ecological ditch are 10. 71%,20. 06%,25. 86%,22.83% higher than ＂一＂shaped respectively. Finally,some suggestions on future research and application of ecological ditch are put forward.
出处
《人民长江》
北大核心
2016年第21期9-14,共6页
Yangtze River
基金
上海市环境科学研究院科技创新项目(CX201307)
上海市科学技术委员会科技攻关项目(11dz1211102)
关键词
布置方式
农田径流
氮
磷
生态沟渠
layout
agricultural runoff
nitrogen
phosphorus
ecological ditch
