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ID:33351004
大小:3.94 MB
页数:125页
时间:2019-02-25
《地质环境和巢湖富营养化控制机制的研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、摘要针对巢湖富营养化控制基础性研究较为不足的实际情况,结合流域地质环境和水环境现状,从信息不确定性角度,对巢湖富营养化控制机制做了较为系统的研究,提出了一些新的计算模型和评价模式。主要成果和结论如下:1.基于河流水环境系统的模糊性和不精确性,构建了带三角模糊参数的入湖河流水质模拟模糊模型。2.从多种不确定性共存或交叉存在的角度,建立了适用于巢湖等大型浅水湖泊环境容量计算的盲数模型。3.以通用土壤流失方程USLE为蓝本,建立了适用于江淮流域的土壤侵蚀量计算盲数模型。4.探讨了河口沉积物潜在生态风险问题
2、,并以十五里河河口为例,运用未确知数学理论进行风险评价。5.分别以信息熵模糊物元模型和多智能体盲数模型,对巢湖流域生态环境质量状况进行评价,并获得一致的评价结论,即目前巢湖流域生态环境质量仅处于一般状态。6.对Fuzzy概率法进行改进,并将其用于巢湖水体富营养化评价。结果表明,2004年巢湖处于中营养化~中富营养化水平,且属于中富营养化的可能性最大,可能性达0.302(30.2%)。7.提出了巢湖富营养化治理的对策、措施。关键词:湖泊富营养化,控制机制,巢湖,沉积物,水环境容量,土壤侵蚀负荷Abst
3、ractConsideringtheinsufficientbasicresearchesonthecontrolofeutrophicationinChaohuLake,asystematicalstudyforthecontrolmechanismoflakeeutrophicationwagconducedfromtheviewpointofuncertaininformation,andseveralnovelcomputingmodelsandassessmentmethodologies
4、wereprovidedinthethesis.ResultsandconclusionsdrawninthisthesisCanbesummarizedasfollows:1.Basedonthefuzziness,imprecisenessandrandomnessofwaterenvironmentalsystem,fuzzyarithmeticisutilizedtosimulatethefuzzyandimpreciserelationsinwaterqualitymodelingforr
5、iverssurroundingtheChaohuLake.2.Fromtheeoncomitancyofrandomness,fuzziness,greypropertyandunaacertmmnentofwaterenvironmentalsystem,blindnumbertheoryinunascertainedmathematicsWasappliedforthecalculationofwaterenvironmentalcarryingcapacityinshallowlakes.O
6、nthesegrounds,anovelmodelwithblindparameters,suitableforlargeandshallowlakes,WaSestablishedforwaterenvironmentalcarryingcapacity.3.Ablindmodelforestimatingthesoilerosionandnon—pointsourcepollutionloadsofabsorbedni仃ogenandphosphoruswasconstructedbydefin
7、ingtheparametersintraditionalUSLEmodelasblindnumbers.4.11圯potentialecologicalriskanalysisforthesedimentsinthemouthofriverssurroundingtheChaohuLake,wagconductedusingunaacertainednumbertheoryinthethesis.Asacase,weconcretelystudiedthepotentialecologicalri
8、skintheestuaryofShiwuliRiver.5.AsforOt20一enviromnentalquailtyassessmentofChaohuLakebasin,twonovelmethodologies,namelyinformationentropyfIlzzymatter-elementmodelandmultiple—agentblindmodel,wereutilized,andobtainedthesameranksfortheeco-en
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