TutorialsofNays2DFlood
Exercise2.Tsunamianalysis
Exercise2. Tsunami analysis
Simulate the flow at a river mouth when tsunami-runup-induced flooding occurs by using Nays2DFlood.
Objectives:
Step1: Import data and Creating the calculation grid
Step2: Setting the calculation conditions
Step3: Making a simulation
Step4: Visualizing the calculation results
Exercise1.FloodanalysisTargetisrivermouseof.
Exercise2. Tsunami analysis
Step1: Input the topography data and
Create calculation grid
1. StarttheiRIC software2. Inputthetopographydata3. DownloadbackgroundimagesfromGooglemap4. Createcalculationgrid
Exercise1.Floodanalysis1. Start iRIC software
StarttheiRIC version2.3. Select[CreateNewProject].
Exercise1.Floodanalysis Select Nays2DFloodv4.1.
Exercise1.Floodanalysis2. Import the topography data
Select[Import>GeographicData>Elevation]onthemenubar. Import[srtm_60_05_ex2.tpo]file.
Import[srtm_60_05_ex2.tpo]file.
Exercise1.FloodanalysisThen,topographymapwillappearasbelow;
Exercise1.Floodanalysis3. Download back ground mages from Google map
Changethetransparentofthetopographymap.Rightclick[Points1]intheobjectBrowser,andselect[Property].
Exercise1.Floodanalysis SettheDisplayMethodas[Surface].Checktheboxof[Transparent],andthevalueissetto[30].
Exercise1.FloodanalysisThen,topographicmapwillbesemitransparent.
Exercise1.Floodanalysis SelectthecoordinatesystembeforewedownloadGooglemap. Selectthe[File>]onthemenubar.
Exercise1.FloodanalysisClicktheEditintheProjectPropertywindow.
Exercise1.FloodanalysisEnter[WGS84]intheSearchbox. Select[EPSG:32650:WGS84/UTMzone50N]Click[OK].
Exercise1.Floodanalysis Select[import>GoogleMapBackgroundImage].
Exercise1.Floodanalysis SelectaresolutionofGooglemapintheZoombox.Thedefaultnumberofzoomissetdependontheyourtopographydataincludingcoordinate.
Ifyouwanttodecreasetheresolution,youcanchangethenumbersmall.
Exercise1.FloodanalysisGooglemapimageswillbedownloadedbehindofthetopographymap.
Exercise1.Floodanalysis4. Create the calculation grid
Select[Grid>SelectAlgorithmtoCreateGrid]. Select[Creategridfrompolygonallineandwidth].
Exercise1.Floodanalysis SettingthegridcenterlinebyPCmouse.
Exercise1.Floodanalysis SetthegridcellnumbersintheXandYdirections. Setthewidthofthecalculationgrid.
Exercise1.FloodanalysisCalculationgridwillbecreated.
Exercise1.FloodanalysisChecktheelevationcontourofthecalculationgrid.
Check
Removethecheck
Exercise2. Tsunami analysis
Step2: Set the calculation conditions
1. Setthecalculationconditions2. Settheinflowpointsanddischarge3. Settheroughnessconditions4. Correctingtheelevationofseaarea
Exercise1.Floodanalysis
Selectthe[CalculationCondition>Setting..]onthemenubar.1. Set the calculation conditions
SelectInflow/OutflowBoundaryConditionsintheGroups.TheBoundaryConditions:OutflowThewatersurfaceatdownstream:Readfromfile Select[Edit]tosetthewatersurfacelevelatthedownstream.
Exercise1.Floodanalysis
Click[Import],andselect[dh01.txt]fileinthe[Nays2DFlood>Sample_data >Exercise2_Tsunami]
Exercise1.Floodanalysis
Then,watersurfacelevel(m)atthedownstreamwillbeimported.Exercise1.Floodanalysis
Select[InitialWaterSurface]inthegroup. Initialwatersurface:Constantslope. Initialwatersurfaceslopeofmainchannel:0.0001
Exercise1.Floodanalysis
Select[Time]intheGroups.Outputtimeinterval(Sec):20(s)Calculationtimestep(Sec):0.2(s)
Exercise1.Floodanalysis
Select[Others]intheGroups.Noneedtochangetheconditions.
Exercise1.Floodanalysis
Exercise1.Floodanalysis
Rightclick[BoundaryConditionSetting]intheObjectBrowser. Select[AddInflow].
2. Set the inflow points of the calculation gird
Then,newlayer[NewInflow]willappear. Selecttheinflowpointsbyusingpolygonasbelow;
Exercise1.Floodanalysis
Exercise1.FloodanalysisThen,BoundaryConditionwindowwillappear.Changethename:inflow_1 Select[Edit]tosetdischargedata.
Exercise1.FloodanalysisClick[Import].Then,select[qt01.txt]fileinthe[Nays2DFlood>Sample_data >Exercise2_Flood]
Exercise1.FloodanalysisThen,dischargewillbeimported.Click[OK].
Exercise1.Floodanalysis
Rightclick[RoughnessCondition]intheObjectBrowser. Select[Add>Polygon].
3. Set the roughness condition
Exercise1.Floodanalysis Selectallgridcellsbypolygon,andclick[Enter].Roughnessconditionoffloodplain(building):0.08
Exercise1.Floodanalysis Inthesameway,makeapolygon2andspecifythelowchannelarea. SettheRoughnesscondition:0.025
Exercise1.Floodanalysis Inthesameway,makeapolygon3andspecifytheseaarea. SettheRoughnesscondition:0.025
Exercise1.Floodanalysis4. Correcting the elevation of sea area
Rightclick[RoughnessCondition >Polygon3]intheObjectBrowser. Select[Copy].
Exercise1.FloodanalysisThen,SelectGeographicDatawindowwillappear. Select[Elevation]andclick[OK]. Input[3]asanelevationvalueoftheseaarea.
Exercise1.FloodanalysisAftermakingseveralpolygons,select[Grid>AttributesMapping>Execute]toassignthevaluetothecalculationgrid.
Exercise1.FloodanalysisCheckeithertheroughnesscoefficientsarepropertyassigned.
Check
Removethecheck
Exercise2. Tsunami analysis
Step3: Making a simulation
Exercise1.FloodanalysisOnthemenubar,select[Simulation>Run].Also,saveyourfileasaniprofileformat(Compressedfile).
Exercise1.FloodanalysisThen,solverconsolewindowwillappear.
Exercise2. Tsunami analysis
Step4: Visualizing the calculation results
Exercise1.Floodanalysis Select[CalculationResult>Opennew2DPostProcessingWindow]onthemenubar.
Exercise1.FloodanalysisCheckthe[Depth]and[BackgroundImages]intheObjectBrowser.
Check
Exercise1.FloodanalysisRightclick[Scalar],andselect[Property..]tochangethecolorvalueofthecontourmapofdepth(m).
Exercise1.Floodanalysis Setthecolorvalueofthecontourmapofthedepth(m).
Exercise1.FloodanalysisAnimationofthecontourmapofDepth(m).
Startbutton
Exercise1.Floodanalysis
Exercise1.FloodanalysisVisualizingflowvector.Check[Arrows]and[Velocity].
Exercise1.FloodanalysisRightclick[Allow],andselect[Property..]tochangetheallowlengthofthevelocityvectormap;.
Exercise1.Floodanalysis Settheallowlengthofthevelocityvectormap.
Exercise1.FloodanalysisAnimationofthecontourmapofdepthandvelocityvectormap.
End.
SettingtheroughnessconditionActuary,theroughnessconditionshouldbesetthevaluewhichdependsonlanduse.
/ColorImageDict > /JPEG2000ColorACSImageDict > /JPEG2000ColorImageDict > /AntiAliasGrayImages false /CropGrayImages true /GrayImageMinResolution 300 /GrayImageMinResolutionPolicy /OK /DownsampleGrayImages true /GrayImageDownsampleType /Bicubic /GrayImageResolution 300 /GrayImageDepth -1 /GrayImageMinDownsampleDepth 2 /GrayImageDownsampleThreshold 1.50000 /EncodeGrayImages true /GrayImageFilter /DCTEncode /AutoFilterGrayImages true /GrayImageAutoFilterStrategy /JPEG /GrayACSImageDict > /GrayImageDict > /JPEG2000GrayACSImageDict > /JPEG2000GrayImageDict > /AntiAliasMonoImages false /CropMonoImages true /MonoImageMinResolution 1200 /MonoImageMinResolutionPolicy /OK /DownsampleMonoImages true /MonoImageDownsampleType /Bicubic /MonoImageResolution 1200 /MonoImageDepth -1 /MonoImageDownsampleThreshold 1.50000 /EncodeMonoImages true /MonoImageFilter /CCITTFaxEncode /MonoImageDict > /AllowPSXObjects false /CheckCompliance [ /None ] /PDFX1aCheck false /PDFX3Check false /PDFXCompliantPDFOnly false /PDFXNoTrimBoxError true /PDFXTrimBoxToMediaBoxOffset [ 0.00000 0.00000 0.00000 0.00000 ] /PDFXSetBleedBoxToMediaBox true /PDFXBleedBoxToTrimBoxOffset [ 0.00000 0.00000 0.00000 0.00000 ] /PDFXOutputIntentProfile () /PDFXOutputConditionIdentifier () /PDFXOutputCondition () /PDFXRegistryName () /PDFXTrapped /False
/CreateJDFFile false /Description > /Namespace [ (Adobe) (Common) (1.0) ] /OtherNamespaces [ > /FormElements false /GenerateStructure false /IncludeBookmarks false /IncludeHyperlinks false /IncludeInteractive false /IncludeLayers false /IncludeProfiles false /MultimediaHandling /UseObjectSettings /Namespace [ (Adobe) (CreativeSuite) (2.0) ] /PDFXOutputIntentProfileSelector /DocumentCMYK /PreserveEditing true /UntaggedCMYKHandling /LeaveUntagged /UntaggedRGBHandling /UseDocumentProfile /UseDocumentBleed false >> ]>> setdistillerparams> setpagedevice