水网连通对大东湖富营养化的影响  

Effect of Water Network Connection on Eutrophication of the Great Donghu Lake

作　　者：罗慧萍 唐见[1,2] 曹慧群[1,2] 赵科锋 LUO Hui-ping;TANG Jian;CAO Hui-qun;ZHAO Ke-feng(Basin Water Environmental Research Department,Yangtze River Scientific Research Institute,Wuhan 430010,China;Hubei Provincial Key Laboratory of Basin Water Resources and Eco-environmental Sciences,Yangtze River Scientific Research Institute,Wuhan 430010,China)

机构地区：[1]长江科学院流域水环境研究所,武汉430010 [2]长江科学院流域水资源与生态环境科学湖北省重点实验室,武汉430010

出　　处：《长江科学院院报》2021年第9期48-54,63,共8页Journal of Changjiang River Scientific Research Institute

基　　金：水利部公益性行业科研专项(201401020);中央级公益性科研院所基本科研业务费项目(CKSF2019498/SH)。

摘　　要：为定量评价水网连通对湖泊富营养化的影响,以武汉大东湖水网连通为研究对象,构建大东湖水网水生态环境数学模型,在模拟分析水网连通前后COD、TN、TP、Chl-a等富营养化评价指标变化的基础上,进一步计算和评价水网连通对各湖泊综合营养状态指数、营养状态的影响。计算结果表明:水网连通后,杨春湖、沙湖、北湖水质改善,藻类生物量减少,水体富营养程度降低;东湖、严西湖水质有一定恶化,藻类生物量增加,水体富营养程度升高;水网连通对湖泊富营养化的影响较复杂,且存在污染风险。研究成果可为水网连通工程的管理运行提供参考依据。To quantify the effect of water network connection on eutrophication,we established a mathematical water eco-environmental model of the Great Donghu Lake Network as a case study.Having simulated and analyzed the variations of eutrophication indices inclusive of COD,TN,TP and Chl-a before and after water network connection,we assessed the effect of water network connection on the comprehensive trophic state index and trophic states of lakes.Our findings manifested that after the water network connection,the water quality in Yangchun Lake,Shahu Lake and Beihu Lake improved,and the algae biomass and eutrophication level decreased;whereas the water quality in the East Lake and Yanxi Lake deteriorated,and the algae biomass and the eutrophication level increased.The results indicated that the effect of water network connection on eutrophication was complex with pollution risks.The research results offer reference for the management and operation of water network connection project.

关 键 词：水网连通 水生态环境数学模型 富营养化 污染风险 大东湖水网 

分 类 号：TV213.3[水利工程—水文学及水资源] X524[环境科学与工程—环境工程]