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ID:33323998
大小:6.30 MB
页数:66页
时间:2019-02-24
《军山湖流域农业非点源入湖负荷估算及评价》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、摘要本文系统地研究了军山湖流域农业非点源污染的入湖机理,通过总结小流域农业非点源污染负荷估算方法,特别是在分析产生系数法优缺点的基础上,建立了军山湖流域农业非点源污染负荷估算模型。本文对军山湖流域农业非点源污染入湖负荷进行了估算,并利用水质监测数据对模拟结果进行了预测误差分析,TN、TP的预测误差分别为.1.34%、.8.93%,模拟结果较好。本文根据军山湖流域农业非点源主要污染物的迁移过程,将其分成了产生、流失、入湖三个阶段。2010年,军山湖流域农业非点源的TN、TP产生量为12543.04t、3962.76t:TN、TP流失量为2795.11t、518.52t;TN
2、、TP入湖量为634.57t、109.66t,其中衙前乡的TN、TP入湖贡献最大,占总量的14.79%、24.17%。从非点源污染物入湖来源来看,TN、TP主要来自于畜禽养殖业,分别占总量的58.19%、77.68%。衙前乡是军山湖流域污染最严重的乡镇,畜禽养殖业是军山湖流域农业非点源入湖污染物的主要来源。根据对军山湖流域的入湖负荷估算及分析的研究结果,为了有效控制军山湖流域农业非点源污染对水体的影响,要重点抓好畜禽养殖污染的控制,以衙前乡为试点,大力推广生态畜牧业,在实践中摸索出一条适合当地的污染治理道路。关键词:农业非点源、军山湖流域、负荷估算、流失、入湖IIAbst
3、ractAbstractThispaperstudiesthemechanismoftheJunshanLakeAgriculturalNon—pointsourcepollutionintothelake,bysumminguptheSmall-WatershedAgriculturalNon—pointsourcepollutionloadestimationmethods.Especiallyinthebaseoftheanalysisoftheadvantagesanddisadvantagesofexportcoefficientmethod,weestabli
4、shedtheJ吼shaIlLakea酊culturalnon—pointsourcepollutionloadestimationmodel.WeestimatedJunshanLakeAgriculturalNon-pointSOurCeinto—lakepollutionload,andanalyzedthepredictionerrorsofthesimulationresultsthroughmonitoredwaterqualitydata,TN,TPpredictionerrorsare一1.34%,·8.93%.separately,whicharequi
5、tereasonable.AccordingtotheprocessofJunshanLakeAgriculturalNon-pointsourcepollutantmigration,wedivideitintothreesteps,whicharegeneration,loss,into-lake.In2010,thegenerationsofJunshanLakeAgriculturalNon—pointsourceforTNandTPare12543.04tand3962.76t,separately;TN,TPlossesare2795.1ltand518.52
6、t;TN,TPinto-lakeare634.57tand109.66t,whichthecontributionsofYaqianTownforTN,TPinto-lakeisthelargest,accountingfor14.79%and24.17%ofthetotal.Intermsofnon—pointsourcepollutantsinto-lakesource,TNandTPmailllyresultfromlivestockandpoultryindustry,accountingfor58.19%and77.68%ofthetotal.TheYaqian
7、TownisthemostheavilypollutedtownaroundJunshanLakeandlivestockfarmingisthemainsourceoftheJWlshanLakeAgriculturalNon-pointsourceinto—lakepollutants.InordertoeffectivelycontroltheJunshanLakeAgriculturalNon—pointsourcepollutionofwaterbodies,itisnecessarytofocusonlivesto
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