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ID:36559603
大小:4.68 MB
页数:140页
时间:2019-05-12
《水库防洪兴利问题理论及方法的应用研究》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、天津大学博士学位论文水库防洪兴利问题理论及方法的应用研究姓名:吴中元申请学位级别:博士专业:大系统理论指导教师:李光泉20021201ABSTRACTReservoir,comingintoexistenceasasimplexengineeringmeansoffloodpreventionattheendof19“century,hadgraduallyevolvedintothemainbodyoffloodpreventionsystemundertakingcomplextaskssuchaspreventingflood、harnes
2、singwaterlogging、supplyingwater、generatingpower、irrigatingandtransportingbythebeginningof20⋯centurySincel950s,asaconsequenceofthebirthanddevelopmentofsystematicengineering、GIS、remotesensingtechnology、computertechnologyandcommunicationtechnology,non-engineeringmeansoffloodprev
3、entionacquireditsownconceptpurportingto(a)transmitthehydrometeorologicaldatacollectedbyremotesensingtOattemperingcentertoprocessthroughsatellites、radarsandcomputers:(b)accuratelyforecastfloodandsuchrelevantcharacteristicsasquantityofflood、sizeandpositionoffloodpeak、lastingtim
4、eofflood、highestwater1evelinkeystations;(c)chosetheplanofdischargingfloodthatcouldsatisfythepolicy-makerandanalyzeronthebasisofraining、floodandengineering,andcarryouttheattemperingplan;(d)estimatethedangerinlowerreachesofriverandissuealertstothefloodedareaintimetohelpretreata
5、ndsalvage.thuslOSSwouldbereducedtothemostpossiblylowestdegree.Themeaning,generallyspeaking,liesinthat:themoreaccurate、earlierthefloodforecastiS.themoreidealtheattemperingplanis,thefasterattemperingplanischosen,andtheshorterdecision—makingprocessiS.theleSSthe10SSprobablycaused
6、byfloodwillbe.Thisliteratureexpatiatesthefollowing:(1)AlongwiththeadoptionofITtechnology,considerablenumbersofhydrological、mathematical、physicalmodelshavebeensuggestedwithdifferentcomplexitycontainingfromafeWparameterstomorethanamountofones.0nthebasisoftheabovementionedmodel,
7、thisPaDerdefinesdrainageareaasalinearreservoirTherefore.theformulaofwaterquantityequilibriumandsluicing—dischargingCallbeexpressedas:dS(t)/dt=P(t)一E(t)一Q(t)=R(t)一Q(t)andS(t)2KQ(t),intheformula,S(t)referstotheprocessofsluicinginaspecificdrainagearea,P(t)theprocessofraining,E(t
8、)theprocessofvaporizing,Q(t)theprocessofwater-running,R(t)theeffecti
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