大比例尺GIS支持下農(nóng)業(yè)生態(tài)環(huán)境模型的應(yīng)用.pdf

1、中國農(nóng)業(yè)大學(xué)碩士學(xué)位論文大比例尺GIS支持下農(nóng)業(yè)生態(tài)環(huán)境模型的應(yīng)用姓名：金思申請學(xué)位級別：碩士專業(yè)：土壤學(xué)指導(dǎo)教師：嚴(yán)泰來2002.6.1Abstract：Theemissionofgreenhousegasesfromagriculturecontributessignificantlytotheimpactofagricultureontheenvironmentanddrawsattentionofmoreandmorepeopl

2、eThustheemissionsfromagriculturalsourcesareconsideredtobeveryimportantThereareseveralmodelsavailabletoestimatethegreenhousegasemissionsfromAgriculturebutusuallythesemodelsareusedonlyforsiteorsmallscalecalculationandrareo

3、nmiddleorlargescaleTllismesisinvestigatesasailexampletheapplicationoftwoverydifferentmodelsforgreenhousegascalculationsonlargescalefortheexampletownshipDongBeiWanginBeijingunderthesupportofChina—GermanCorporationProject“

4、SustainableAgricultureintheNorthemChinaPlain”ThetwomodelsaretheDNDCmodelandtheIPCCguidelinesfornationalgreenhousegasinventoriesThroughtheapplicationofthetwomodelsandthecomparisonandevaluationofthemodelresultswithmeasurem

5、entdataitwasshownthatIPCCcalculatestoohighandDNDCtoolowvaluesByusingtheavailablemeasurementdatafromDongbeiwangitwaspossibletoimprovetheIPCCmethodbvtheintroductionofanewemissionfactorThenewemissionfactorforthecalculationo

6、fN20—emissionsfromfertilizeruseis0008The3Stechnologiesareusedtoset—uDalargescaleagriculturalenvironmentalinformations3，stem(LSAEIS)TheLSAEISincludesallinputparametersofthemodelswhicharesoildata，1andusedata，statisticdata，

7、climatedata，experimentmeasurementdataandfarmmanagementdataBecauselargescalelandusedataarenoteasytocollectanIKONOSremotesensingimagewaschosentoimprovethelanduseinformationneededThegroundcontrolpointswhichwereavailablefrom

8、ownDGPSmeasurementswereusedtogeorectifyandgeoreferencetheIKONOSimageFurthermore，trainingfieldsforthesupervisedclassificationoftheIKONOSimagewereprovidedfromtheownDGPSmappingThethesisshowstheimportanceoflargescaleapplicat

9、ionandinvestigationofdifferentmodelstogetessentialknowledgeforregionalmodelingoftheimpactofagriculturalactivitiesontheenvironmentImportantknowledgewasgainedfromthethesisthroughtheapplicationoftheDNDCandIPCCmodelsonlarges

10、calewhichisnecessaryifthemethodsareintroducedtootherregionsorfortheapplicationofthesemodelsinmiddleandeveninsmallscaletocalculatetheimpactofagricultureontlleenvironmentFinallyThethesisin仃oducedtheinformationserviceoftheC