可调式沉水植物网床净化河道中水质的效果——以苏州市贡湖金墅港断头浜为例  

Effect of Adjustable Submerged Plant Bed Nets on Water Quality Purification in River Channel—A Case of Gonghu Jinshu Port in Suzhou

作　　者：吴建勇[1] 温文科[1] 吴海龙[1] 王阳阳[1] 邵留[1] 霍元子[1] 于克锋[1] 何培民[1] 

机构地区：[1]上海海洋大学水产与生命学院,上海海洋大学水域环境生态上海高校工程研究中心,上海201306

出　　处：《湿地科学》2014年第6期777-783,共7页Wetland Science

基　　金：国家水体污染控制与治理科技重大项目(2008ZX07101-012);上海市科学技术委员会重点科技攻关项目(09391912000);上海市科学技术委员会应用基础研究项目(09DZ1200903);上海市水生生物学重点学科资助项目(S30701)资助

摘　　要：基于可调式沉水植物网床技术,对江苏省苏州市贡湖金墅港断头浜河水进行了净化水质的生态工程修复实验,监测了修复前、后的水质指标（NO3^-—N、NO2^-—N、PO4^3-—P、DO、NH4^＋—N、TN、TP和CODMn的含量及透明度）,采用综合水质标识指数法对沉水植物网床生态修复效果进行了评价。结果表明,沉水植物网床修复后,沉水植物损失率为20%,4-5 d网床中的水盾草（Cabomba sp.）开始生根分蘖,且20-25 d后长满整个网床,3个月后河道中的沉水植物覆盖率达95%,其中优势种水盾草所占比例达70%,水体透明度由0.45 m提高到0.97 m,河水清澈见底。到2012年6月,水中NO3^-—N、NO2-—N、PO4^3-—P、NH4^＋—N、TN、TP和CODMn的含量分别下降82.8%、74.1%、90.1%、92.6%、71.8%、95.6%和48.6%,DO含量提高了65.3%;综合水质标识指数由5.1下降到2.7,降低了47%,与对照区相比差异显著（p〈0.05）。Based on adjustable submerged plant bed nets technology,we conducted a water quality purification project of ecological restoration experiment on Gong Hu Jinshu port in Suzhou,Jiangsu province.Before and after restoration experiment,we carefully monitored the common water quality indicators,including NO3^-—N、NO2^-—N、PO4^3-—P、DO、NH4^＋—N、TN、TP、CODMnand transparency and evaluated the ecological restoration effect of submerged plant bed nets through comprehensive water quality identification index method as well.The results showed that the loss rate of submerged plant was only 20% after the implementation of the project.And after 4-5 d,submerged plants began to produce new roots in restoration area,which would be fully covered after another 15-20 d.Three months later,the coverage ratio of the submerged plant was up to 95%,and the rate of the dominant species of Cabomba sp.was as high as 70%.In addition,transparency had an obvious increase from 0.45 m to 0.97 m,which made the bottom of the water see.The concentration of NO3^-—N、NO2^-^—N、PO4^3-—P、NH4^＋—N、TN、TP、CODMndecreased by 82.8%、74.1%、90.1%、92.6%、71.8%、95.6%、48.6% respectively in June 2012,while the concentration of DO increased by 65.3%.Besides,the comprehensive water quality identification index decreased from 5.1 to 2.7（a fall of 47%）,showing stark contrast to the control areas.

关 键 词：断头浜 水质 富营养化 可调式沉水植物网床 生态修复 

分 类 号：X524[环境科学与工程—环境工程]