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1、StudiesonResourceManagementofSanjiangPlainGroundwaterwiththeAnalyticalFiniteMethodBasedonSquareGridJune2OO6JournalofNortheastAsriculturalUniversityVo1.13,No.165—68Article】口D:10o6—81O4(2006)一01—0065—04StudiesonResourceManagementofSanjiangPlainGroundwaterwiththe
2、AnalyticalFiniteMethodRENYongtai,DENGHualing,XUDan(CollegeofScience,NortheastAg.culturalUniversity,HarbinHeilongjiang150030,PRC)Abstract:ThisarticleestablishedgroundwaterflowsdifierentialequationmathematicalmodeIofSanjiangPlainonthehydrologytheoryfoundation,an
3、dusedtheanalysisfiniteelementmethodtolinerchangethedifierentialequationintotheIarge—scalesystemofIinearequations.IttookIinearequationsasapartofconstraintconditionsoftheopti-mizedmodel,carriedonthegroundwaterflowstatusequationandtheoptimizedmodelthecoupling,and
4、carriesonthesolutionwiththeLingosoftware.TheresuEsindicatedthatthislocalshallowlayergroundwaterresourceswererichandhavethebigdevelopmentpotentia1.Butrecentyearswaterresourcesdispositionwasunreasonableandgroundwaterminingquantitywasoversized,thesecausedtheregio
5、nwaterfluxtoassumethedroptendency.Keywords:SanjiangPlain;groundwater;,mathematicalmodel;analysisfiniteelementmethod;LingoCLCnumber:P941.75;TV121+.3Doculnentcode:ASanjiangPlainareaisunderthejurisdictionofHeilongjiangProvince,whichliesintheNortheastofHeilongjian
6、gProvince,includingthetriangularareawheretheriverconvergesbyHeilongjiangRiver,SonghanRiverandWusuliRiver,andtheareaofMulingRiver,WokenRiveraswel1.After50yearsdevelopment,SanjiangPlainhasbecomethemostim—portantcommoditygrainbaseinourcountry.Becauseofmuchagricul
7、turalreclamation,theareaofmarshlandinSanjiangPlainreducedsharply,itwasap—proximately534500hectaresin1949andithaslostmorethan80%ofitatpresentstage.Theinconsisten-cyaboutthegroundwaterismoreprominentthanbe-fore,andthefactorsoftheclimateandtheunderlyingsui'~acein
8、SanjiangPlainchangedgreatlyinrecentyears.Re—appraisesofthegroundwaterresources,andhowtodevelopandusethegroundwaterreasonably,tosatisfytheindustryandagriculturalneedofwater,tomainta