民勤綠洲邊緣區(qū)基于節(jié)水的生態(tài)環(huán)境治理優(yōu)化模式研究.pdf

1、蘭州大學(xué)碩士學(xué)位論文民勤綠洲邊緣區(qū)基于節(jié)水的生態(tài)環(huán)境治理優(yōu)化模式研究姓名：周鯤鵬申請(qǐng)學(xué)位級(jí)別：碩士專(zhuān)業(yè)：水利工程水文學(xué)及水資源指導(dǎo)教師：馬金珠20090501蘭州大學(xué)碩士學(xué)位論文AbstractMinqinOasislocatesinthedownstreamofShiyangRiverBasinItissurroundedbytheBadanJaranDesertandTenggerDesertonitsnortherneastern

2、andwesternsideThepotentialevaporationisabout24times鑫sthatofprecipitationBesides，itssurroundingdesertranksthefirstofChina’Sfourlargestsourceregionsofsandstoms，whichmakesitthemostdemandingregionintheprocessofecoenvironment

3、improvementinthearidareasofNorthwestChinaTheeco—environemntaldeteriorationprocessinMinqinOasisreflectsthefactthatoverexploitationofhumanactivitiesunderthelocaldryandweakecologicalsystemwhichbringsaboutshortageofregionwat

4、erresources，soildroughtaswellasgradualdeclinesofdesertvegetationandartificialwindbreakandsandfixationforests，SOitissignificanttOexploretheoptimizationecoenvironmentimprovementmoduleThispaperdoesadetailstudyabouttheeco—en

5、vironmentimprovementinthefringeareaofMinqinOasisandraisesanoptimizationmodulebasedonwatersaving—theZhengxinModule。Itdoesanevaluationofmulti—objectivedecisionwithZhengxinandother6representativecasesinthefringeareaofMinqin

6、Oasis：Songhe，WangmouHuanghui，Weijie，HuazahaiandDongyunBycalculatingthechangesinthevolumesandstructureoflocalwaterconsumptionintheexperimentalandresearchzones，thepaperanalyzestheinfluenceofthenewmoduleonlocalwaterresource

7、s。ThepaperalsoconstructsancooenvironmentappraisalindexsystemoftheresearchzoneandsetsuparankaboutappraisalresultswiththeGreyRelationProjecfionMethodThecalculationresultshowsthat，comparedwithothermodules，theZhengxinmoduleh

8、assignificantlyimprovedthelocaleco—environment。Underthenewmodule，theamountoftotalwaterconsumptionreducesby381163104m3withtherateofreductionatabout539％；theproportionofirrigationdecreasesfrom97。6％to89。3％whiletheecologicalp

9、roportionrisesfrom06％to42％；Meanwhile，theecoenvironmentqualityraisestorankIIafterthemodule’Spromotion，whilethepresentqualityisrankⅣandtheidealconditonisrankI。Theoptimizationmoduleofeco—enviromentimprovementbasedonwatersav