基于网络技术的非充分灌溉决策支持系统研究

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1、分类号：s2密级：公开Y939879单位代码：10019学号：B02360弋目岩≮夭等学位论文基于网络技术的非充分灌溉决策支持系统研究StudyOilDeficitIrrigationDecisionSupportSystemBasedontheWeb研究生：自菝指导教师：氇缉五熬援申请学位类别：王堂蝗±专业领域名称：盛些工程研究方向：灌煎挂垄理途生堑拉盔所在学院：丞型皇±盔至捏堂瞳2006年5月中国农业大学博士学位论文AbstractThepurposeofstudyingdeficitirr

2、igationdecisionsupportsystem(DSS)basedonthewebistosupplytheapplicationfiatforpopularizingagriculturalwatersavingtechnology．Itisofimportantacademicandpracticalmeaningtopopularizetheharvestusingnetworktechnology,advancethetransformationefficiencyofrele

3、vantresearchachievementsandthemodemmanagementlevelofirrigationareas．ThisDSSiscomposedofDatabaseandModelbasemanagementsystem，Inordertorealizethefunctionsofthedeficitirrigationdecisionsupportsystembasedontheweb，thetechnologiesofTCP／IEBrowser／Servermode

4、l，ASP(ActiveServerPage)，DatabasemanagementsystemofMicrosoftSQLServer2000，andtheprogramminglanguagesofVBScript，VisualBasic6．0wereselectedinthispaper．Databasemanagementsystemconsistsofthreedatabase(meteorologicaldatabase，waterrecoursesdatabase，irrigati

5、ondatabase)．Thedataincludedailymeteorologicaldataof400weatherstationsfrom1950to2000．waterrecoursesdatafrom1994to2001andirrigationdataofwinterwheat，summercorn，cottoninShanxi，Shannxi，Hebei，Henanprovincesfrom1953to1989，Modelbasemanagementsystemconsistso

6、ffourmodelbase(cropwaterrequirement，cropwaterproductionformula，soilwaterforecast，deficitirrigationscheduleoptimization)．Inthecropwaterrequirementmodelbase，thePenman-Monteithformulaandsinglecropfactor,whichwereputforwardbytheFoodandAgricultureOrganiza

7、tion(FAO)oftheUnitedNationsintheIrrigationandDrainagePaper56in1998，wereusedtoprogramthedailyreferencecropevaportranspirationtoolsandthedailycropfactorinthewholeseason．Atthesarnetime，inordertoheapfavorsupontheusers，thedallyandmonthlyreferencecropevapo

8、rtranspirationfrom1991to2000werestoredinMicrosoftSQLServer2000Database．Inthecropwaterproductionformulamodelbase，theirrigationdataofwinterwheatandsummercorninShanxi，Shannxi，Hebei，Henanprovinceswerechosenfromdatabase．Regressionmethodwasusedtostudythepa