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TheprocessoutlinedinthisdocumentincludesstepsfordelineatingObjectives:StartingwithaDEM,wearegoingtoextractachannelnetwork,delineate watershedsandcalculatesomestatistics.Beforemorphometricanalysis,delineationofwatershedboundaryanddigitizationofallexistingstreamincludingits tributariesUnderstandingwatershedscanhelpengineersdesignsystemsthatdeliverorprotectkeysourcesofwaterThefirstthingistoloadtheprojectwiththe lessondata,whichjustcontainsaDEMThefirstmoduletoexecuteisCatchmentarea(insomeSAGAversionsitiscalledFlowaccumulation(TopDown)) WatershedSubmitareport(notPPTslides!)todescribethisprocessandresultsYoucanestimatethewatershedareafromanelevationrasterthatisinaplanar coordinatesystemsuchasmetersDelineationispartoftheprocessknownaswatershedsegmentation,ie,dividingthewatershedintodiscretelandandchannel drainagenetwork(lines)withinthewatershedDefiningtheboundariesofaDelineatedwatershedsarerequiredforHSPFmodelingandforBASINSwatershed characterizationreports.(S:\Tutorials\Tufts\TutorialData\WatershedDelineationbyPourPoint)Note:ifyourareaisfairlyflat,thewatershedareadelineationwill notbeaccurateWatershedDelineationwithArcGISxWatersheds,alsoknownasbasinsorcatchments,arephysicallydelineatedbytheareaupstreamfroma specifiedoutletpointBikashSherchan,TechnicalJournal,NepalJournalsOnline,ISSNDEM,ETM+8,geologicmap,andSPSSwereusedtocharacterizethe hydrologicalparametersanddelineatethewatershedSWAT2lakehasbeendesignedasapluginfortheQGISsoftwarethatworksinparallelwithQSWATandit isavailablethroughGraphicalabstractObjectives:StartingwithaDEM,wearegoingtoextractachannelnetwork,delineatewatershedsandcalculatesome statisticsInthislab,youwillestimatewatershedsusingarelativelycoarseelevationraster(meterpixels)Inthispaper,wedescribethedesignanddevelopmentof SWAT2lake,atoolthatremediessuchimprecisedelineationofwatershedstolakesandreservoirsDelineatetheboundaryofawatershedinCanadausing QSWAT(orothersoftware)ComparetheareaofthiswatershedwiththeareainHYDAT.Pourpointdata(eithervectororraster)representlocationsabove whichthecontributingareawillbedeterminedTheBasintoolfindsitsownpourpointsandcreateswatershedsforthewholemapTheWatershedtoolcreates watershedsforthepourpointsthatyouprovideLabAssignmentThumbofruleforreport:SomeoneelsewhoneverusedQSWATbeforecanduplicateyour workbyfollowingyourreportWatershedDelineationSubmitareport(notPPTslides!)todescribethisprocessandresultsThumbofruleforreport:Someone elsewhoneverusedQSWATbeforecanduplicateyourworkbyfollowingyourreportWatershedsshowthepathwatertravelsoverlandinaparticularareaon itswaytoariver,lake,orstreamYouwillusethesamethestreamgagedatapointandDEMthatyouusedinTutorialArcGISBasicsforWaterResources MappingTendrainagebasinswereextractedandimplementationofwatershedmanagementisessentialtoachievesustainableusesoflandandwaterresourcesto mitigatetheincreasingdemand(Javedetal.,;Raietal.,;Prakashetal.,).SoilandWaterAssessmentTooliswidelyusedtosupportwaterquantityandquality studiesThefirstthingistoloadtheprojectwiththelessondata,whichjustcontainsaDEMThefirstmoduletoexecuteisCatchmentarea(insomeSAGA versionsitiscalledFlowaccumulation(TopDown))WatershedSWATanddigitalelevationmodels(DEM)canbeusedtoperformwatershedDownloadFree PDFAnalysisofWatershedsinGandakiProvince,NepalUsingQGISDelineatetheboundaryofawatershedinCanadausingQSWAT(orothersoftware) ComparetheareaofthiswatershedwiththeareainHYDATInthisactivity,studentsbecomecivilengineersastheyusetopographicmapstodelineate watershedsWatershedscanbedelineatedmanuallyusingpapermaps,ordigitallyinaGISenvironmentSowecancharacterizeandinvestigatewhatisgoingonin oneportionofthestudyareaversusanother.Pourpointdata(eithervectororraster)representlocationsabovewhichthecontributingareawillbedeterminedThe BasintoolfindsitsownpourpointsandcreateswatershedsforthewholemapTheWatershedtoolcreateswatershedsforthepourpointsthatyouprovideLab Assignment