简介:ThispaperhighlightstheresearchanddevelopmentactivitiesbeingdoneonurbanforestryinthePhilippines.TherolethatR&Dplaysinurbanforestryislikewisediscussedintheintroduction.Recommendedtreespeciesforurbanplantingarepresentedincludingtheircharacteristicsanddistribution.Researchesrelatedtourbanforestrybeingconductedarelistedwithashortdescriptionofeachproject.Developmentactivitiesonurbanforestryarelikewisediscussed.Finally,recommendedR&DagendaandresearchableareasbasedonthePhilippineAgenda21andtheDepartmentofEnvironmentandNaturalResources(DENR)R&DFrameworkarepresented.
简介:Background:Monitoringforesthealthandbiomassforchangesovertimeintheglobalenvironmentrequirestheprovisionofcontinuoussatelliteimages.However,opticalimagesoflandsurfacesaregenerallycontaminatedwhencloudsarepresentorrainoccurs.Methods:Toestimatetheactualreflectanceoflandsurfacesmaskedbycloudsandpotentialrain,3DsimulationsbytheRAPIDradiativetransfermodelwereproposedandconductedonaforestfarmdominatedbybirchandlarchinGenheCity,DaXing’AnLingMountaininInnerMongolia,China.Thecanopyheightmodel(CHM)fromlidardatawereusedtoextractindividualtreestructures(location,height,crownwidth).Fieldmeasurementsrelatedtreeheighttodiameterofbreastheight(DBH),lowestbranchheightandleafareaindex(LAI).SeriesofLandsatimageswereusedtoclassifytreespeciesandlandcover.MODISLAIproductswereusedtoestimatetheLAIofindividualtrees.CombiningalltheseinputvariablestodriveRAPID,high-resolutionopticalremotesensingimagesweresimulatedandvalidatedwithavailablesatelliteimages.Results:Evaluationsonspatialtexture,spectralvaluesanddirectionalreflectancewereconductedtoshowcomparableresults.Conclusions:Thestudyprovidesaproof-of-conceptapproachtolinklidarandMODISdataintheparameterizationofRAPIDmodelsforhightemporalandspatialresolutionsofimagereconstructioninforestdominatedareas.
简介:总结引种洛阳后萌发较晚的紫斑牡丹茎叶生长规律情况,结果表明,萌发期为3月上旬;7个品种紫斑牡丹的茎高、叶长和叶宽年平均生长量存在差异,表现出植株高矮和叶片大小的不同,但各指标的变化趋势基本一致。物候期比原产地提前30天。茎高生长起始时间早,速生期短,生长集中;叶生长的持续时间相对要长;叶宽生长的结束期更迟于叶长。3月12日—4月16日为这些紫斑牡丹茎生长高峰期,平均茎高生长量达23.56cm;4月24日已完成茎高全年生长量,年平均生长量为23.99cm。从3月下旬至4月中旬是叶片的迅速生长期,4月16日叶片大小定形,平均叶长、叶宽分别达到28.16cm和23.80cm。花期集中在4月16—26日,培育晚开新品种有重要意义。
简介:Themodernizationandinformatizationmanagementofancientandfamoustrees’managementisanimportantstandardwithwhichthemunicipalpublicresourcemanagementlevelofaregionorcitycanbemeasured.Designanddevelopmentofancientandfamoustrees’three-dimensionalmanagementinformationsystemwasrealizedbasedonvirtualplantbyusingintegratedtechniquesofvirtualplantsandGeographicInformationSystem.Thesystemarchitecturedesignwasdevelopedonthebasisoffunctionalrequirements,andthepracticalsystemwasachievedinVisualStudio2008developmenttoolsandOpenGLgraphicsstandards.Thesystemhasfunctionofancienttreesarchivesmanagement,three-dimensionalreconstructionofthetreessurroundingenvironment,individualtreeinformationinquiryinthree-dimensionalscene,etc.Applicationanddisseminationofthissystemwillgreatlypromotethemanagementandprotectionofancientandfamoustreesstandardization,informalizationandvisualization