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1、2』，’大連水資源供需趨勢(shì)分析TheanalysisaboutthetrendofDalianWaterSupplyandDemandAbstractWraterisanecessaryconditionforeconomicdevelopment．Withrapideconomicdevdopmeut，DalianregioniSthegatewayinNortheastandallimportantcomponentoftheBohaiSeaeconomic．circle．sufficientwaterreso
2、urceinthisareaisanimportantprerequisiteforthedevelopment．Therefore,tostudyitswatersupplyanddemandchangesareconducivetoacorrectunderstandingofthestatusofwaterresourcesinDalianandthepromotionofthecoordinateddevelopmentofeconomyandecologyinthisregion．WatersyStemi
3、ncludeswatersupply,waterdemandandthebalancebetweensupplyanddemand．Availablewaterrefertotheamountofwatersuppliedbyengineeringfacilitiesintheyearswithdifferentlevels，withthedifferentguaranteedrates，whenwaterrequirementsandwatersupplyaretakeniutoaccount．Unfavorab
4、lewaterconditionsinthisarea，greatlyinfluencedbynaturalrainfall，itsrelevanceiSupto0．8507．TheaveragesannualprecipitationiS550—950mm，inthesouthoftheGoldenState，iSevenless：550—650mm，-Sotheprecipitationofwaterdoesnotmeetthewaterdemandinthisarea．TheutilizationrateiS
5、57．85percent．iSahightension．Thesurfacewater,accountingformorethan70％ofthetotalamountofwater,iSthemainsourceofwatersupplyinthisarea．Groundwaterisallimportantadditiontowater,waterreuseanddesalinationtoaddressallimportantmeansofwaterinsomeareas．Jnthisarea，theamou
6、ntofwaterdemandisgreatlyaffectedbyeconomicdevelopment,mostimpactedbyregionalindustrialoutputvalueandtherelevanceofindustrialoutputreached0．8579．Inrecentyears，thefluctuatiOIlSinwaterdemandhasshownaupwardtrend，agriculturalwateraccotmtstoalargerproportionofthedem
7、and．Industrialwaterconsumptionneedstoincreasefaster．Nowadaysthewatersupplyanddemandisbasicallyinbalance，butthereareagreatvolatility,andthereisallimbalancetrendsbetweensupplyanddemand．AfterLearnedmanycalculationmethodsathomeandabroad，quota-ealculationandtrend—a
8、nalysisareadopted．By2010，inthisarea1．6billioncubicmetersofwaterwillbeneeded，butwatersupplycapacityinthisareaisonlyl，566，500，000cubicmeters．By2020，waterrequirementinthisareaistoreac
