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OALib Journal期刊
ISSN: 2333-9721
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河岸带不同植被类型及宽度对污染物去除效果的影响
DOI: 10.3969/j.issn.1000-2006.2013.06.010, PP. 47-52
Keywords: 河岸缓冲带,植被类型,植被宽度,污染物去除率
Abstract:
以太湖流域东战备河自然河道为对象,比较分析了4种植被类型及3m和6m宽度河岸带分别对tn、nh+4-n、tp和cod等4种面源污染物去除效果的影响。结果表明,不同植被类型对污染物的去除率受季节和污染物种类变化的影响。灌草植被河岸带对面源污染物的去除率在全年内均较高,草本植被对污染物去除率在夏秋季最高而冬季最低,乔灌草植被的去除率高于乔草。不同河岸带宽度对污染物去除率的影响随季节、污染物类型和植被类型而变化,表现为冬季大于夏季,tn大于tp,乔草大于灌草。总体来看,现行条件下4种植被除了对tn的去除率较低,全年仅为20%～40%外,对nh+4-n、tp和cod的去除率分别达到了20%～70%、50%～90%和40%～80%,去除效果显著。
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