arc hydro - aviso弧水电通报

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1、ArcHydroArcHydroisanArcGISextensionthatwasintroducedin2002withthegoalofstandardizinganefficientwaytoanalyzethehydrologicdata.ArcHydrohasthreemaincomponents:Standardformatforstoringdata,Datarelationshipsbasedonhydrologicprinciples,Toolsspecificallydesignedfordealin

2、gwithhydrologicdata.ArcHydroalsohasversions:·ArcHydroFramework:Onlynecessaryfeatureclassestocreateflownetwork·ArcHydroFrameworkwithTimeSeries:canusetimeseriesdatainanalysis·ArcHydroFullModel:Everythingfoundintheother2versions+riverschematics,channels,andflowexchan

3、gepoints*SincetheSpatialAnalysisLab(SAL)nowhasArcGIS9.1,youMUSThaveArcHydrov1.1Finalwhichisonlyinstalledoncomputers30and31.ToBegin:Youmustdoallthepreprocessingstepsinorderandacceptalldefaultnamestobuildthecorrectdatarelationships.PreprocessingSteps:*OpenDEMandastr

4、eam,riverorwaterbodylayerTurnonSpatialAnalystRightclickàselectspatialanalystTurnonArcHydroToolsRightclickàArcHydroTools*BeginTerrainPreprocessingTerrainPreprocessingàDEMReconditioningUsesavectordatasettoenforcealineardrainagepatternontheRawDEMTerrainPreprocessingà

5、BuildWallsCreateswallsintheDEMattheboundaryofselectedinputpolygonsTerrainPreprocessingàFillSinksFillsanysinksthatmayexistintheDEMTerrainPreprocessingàFlowDirectionCreatesagridofflowdirectionTerrainPreprocessingàFlowAccumulationUsestheflowdirectiongridtocreateaflow

6、accumulationgridTerrainPreprocessingàStreamDefinitionCreatesastreamgridbasedontheflowaccumulationTerrainPreprocessingàStreamSegmentationLinksanytwostreamjunctionsusingthestreamgridTerrainPreprocessingàCatchmentGridDelineationIdentifiesareasthatdrainintoeachstreaml

7、inkTerrainPreprocessingàCatchmentPolygonProcessingTurnsthecatchmentgridintoapolygonTerrainPreprocessingàDrainageLineProcessingFormsstreamsfromstreamlinkgridTerrainPreprocessingàAdjointCatchmentProcessingCreatespolygonsforeachcatchmentthatshowtotalupstreamareadrain

8、ingintoagivencatchmentTerrainPreprocessingàDrainagePointProcessingCreatesdrainagepointsforeachcatchmentwheretheflowaccumulationvalueishighestTerrainPrep