Regional Breakout Session GIS Topics: ABRFC River Flood Climatology John Schmidt, Senior Hydrologist James Paul, Senior HAS December 6, 2002 2002 National.

Regional Breakout Session

GIS Topics: ABRFC River Flood Climatology

John Schmidt, Senior Hydrologist

James Paul, Senior HAS

December 6, 2002

2002 National Weather Service National Hydrologic Program

Manager’s Conference

River Flood Climatology Origins

Hydrologic companion to popular percent-of-normal precipitation products (Sep 1999).

Initial Problems/Limitations

1. Climatological time-scale of data

> PRISM data for percent-of-normal products

> ABRFC archived data from 1993 to present

> USACE Tulsa, Albuquerque and Little Rock generously provide entire digital archive allowing ABRFC to compile comprehensive 6-hourly dataset back to 1984.

Initial Problems/Limitations

2. Defining a flood ‘event’

> Hydrograph resulting from single precipitation event?

> Period between river rising above and falling below flood stage?

> Every crest of river stages?

Initial Problems/LimitationsDefining flood “event”

Initial Problems/LimitationsDefining flood “event”

Consistent logic must be used when automating.

So…..an “event” is a single, synoptic observation.&

(“flood event”/4) = “flood day”

Consistent with verification assumption.

Not perfect, but is easily applicable at all locations.

Flood Climatology Calculations

• Database queries on SQL Server database with mirror of AWIPS abarchive schema provided number of flood days per month for months 1984-2001 (needed 75% of complete data for a month for a site)

• Used ArcView to create graphics depicting river reach flood climatology

Flood Climatology Calculations

Monthly Average Flood Climatology (1984-2001)

0.0

10.0

20.0

30.0

40.0

50.0

60.0

70.0

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

To

tal F

loo

d D

ay

s

/ Flo

od

Lo

ca

tio

ns

0.00

0.50

1.00

1.50

2.00

2.50

3.00

3.50

4.00

4.50

Da

ys

of

Flo

od

ing

pe

r L

oc

ati

on

Days of Flooding per Location Total Flood Days Locations with Flooding

Flood Climatology Calculations

ABRFC Statistics

Arkansas River @ Van Buren, AR 31.43

Deep Fork River @ Beggs, OK 23.12

Neosho River @ Commerce, OK 16.74

Fourche La Fave River @ Houston, AR 14.43

River Station (days/year)

Neosho River @ Parsons, OK 7.58

Little River @ Tecumseh, OK 4.32

Neosho River @ Commerce, OK 3.63

Deep Fork River @ Beggs, OK 3.35

Arkansas River @ Van Buren, AR 3.24

River Station (months/year)

Petit Jean River @ Danville, AR 3.06

Top five annual flood sites Top five average number of months with flooding per year

Amount of flooding Frequency of flooding

Define Boundaries and Barriers

Boundaries for river reach

Barriers for river interpolation

Interpolating and Masking

Interpolation using barriers Interpolated result masked to river

Joining Masked Interpolations

Average annual flood days (1984-2001)

Abrfcr ivs.shp

0 - 0.50.5 - 11 - 33 - 55 - 77 - 1414 - 2121 - 2828 - 6060 - 90No Data

ABRFC Flood Climatology WFO-Specific Webpages

Average Annual Flood Days

ABRFC Flood Climatology WFO-Specific Webpages

Winter Spring

Summer Fall

ABRFC Flood Climatology WFO-Specific Webpages

Average Annual Flood Days

ABRFC Flood Climatology WFO-Specific Webpages

FOURCHE LAFAVE RIVER - HOUSTON 3SWHUSA4

Average number of flood days per month

ABRFC Flood Climatology WFO-Specific Webpages

FOURCHE LAFAVE RIVER - HOUSTON 3SWHUSA4

Yearly Flood Days

Possible Uses

A. VerificationThe genesis of this project was to find a way to assess the "forecastability" of rivers in order to explain the fluctuation of hydrologic verification statistics. The Sacramento Soil Moisture Accounting Model is calibrated empirically. Therefore, the greater the number of flood events at a given station, the more data available to calibrate the model. Additionally, flood events of long duration are typically easier to forecast with less error than floods of short duration. These analyses will assist in the explanation of hydrological verification metrics.

B. TrainingService Hydrologists and Warning Coordination Meteorologists at the WFO may use these products to brief staff, emergency managers and the general public on the seasonal variability of flooding, as well as the more flood-prone rivers in their Hydrologic Service Areas. Additionally, these products will be used to train new ABRFC employees on the hydrologic climatology of the ABRFC area. It is much easier to present and understand this information in a graphical format than by using text.

For More Information...

http://www.srh.noaa.gov/abrfc/floodclimate/index.shtml

NOAA Technical Memorandum NWS SR-219

[email protected]

[email protected]

'written by John Schmidt 08-2001'this script generates a masked, gridded map given point data

rivList = {"Cottonwood_Wichita_FourcheLaFave", "Washita_Neosho_LittleSE", "Arkansas_Red", "Canadian_WalnutC_Blue","Cimarron_PetitJean_ECache", "Verdigris_LittleOKC_MedicineLodge","RedNF_ArkSaltFork_Lee", "NCanadian_Shoal_Glover", "Chikaskia_Cobb_Mulberry", "LilArkansas_MuddyBoggy_Sweetwater","Poteau_Walnut_Wolf", "Cow_Flint_BlackBear", "DeepFork_ElkKS_Crooked", "Fall_Ninnescah_CottonwoodC","Whitewater_Caney_BeaverC", "LilCaney_Polecat_Sanders", "Rattlesnake_Illinois_LilWashita","SaltForkRed_Bird_MountainFork", "Hominy_Spavinaw_Wildhorse", "DeepRedRun_Kiamichi_SFkNinnescah","Fountain_Cossatot_Birch", "Pawnee_Spring_CimarronC", "Saline_Mora_Buckner", "Revuelta_Purgatoire_ElkMO","PaloDuro_Pease_BigHill", "RollingFrk_BeaverR_Rock_BaronFrk"}

barList = {"CWFbar.shp", "WNLbar.shp", "ARbar.shp", "CWBbar.shp", "CPEbar.shp", "VLMbar.shp", "RALbar.shp", "NSGbar.shp","CCMbar.shp", "LMSbar.shp", "PWWbar.shp", "CFBbar.shp", "DECbar.shp", "FNCbar.shp", "WCBbar.shp", "LPSbar.shp","RILbar.shp", "SBMbar.shp", "HSWbar.shp", "DKSbar.shp", "FCBbar.shp", "PSCbar.shp", "SMBbar.shp", "RPEbar.shp","PPBbar.shp", "RBRBbar.shp"}

'"jan", "feb", "mar", "apr", "may", "jun", "jul", "aug", "sep", "oct", "nov", "dec"

monthList ={"jan"}rivCount = rivList.Countcounter = rivCount - 1

theView = av.GetActiveDoctheTheme = theView.GetActiveThemes.Get(0)theRadius = Radius.MakeVariable(2,100)thePower = 1

theABRFCTheme = theView.FindTheme("ABRFCMask")theABRFCGrid = theABRFCTheme.GetGrid

for each mon in 0..0for each num in 0..counter

river = rivList.Get(num) barrier = barList.Get(num) month = monthList.Get(mon) tablename = "\fldclimate\"+river.AsString+theTheme.AsString+month.AsString+".txt" tablelabel = river.AsString+theTheme.AsString+month.AsString+".txt" finlabel = "ABRFC"+theTheme.AsString+month.AsString+".txt"

'run external program to filter monthly file

' system.execute("cd \fldclimate") system.execute("filter"++theTheme.AsString+month.AsString+ ".txt"++river.AsString)'MsgBox.Info(theTheme.AsString+month.AsString+".txt", "\fldclimate\filter")

theFileName = tablename.AsFileName theVTab = VTab.Make(theFileName, false, false) myTable = Table.Make(theVTab) myTable.SetName(tablelabel) myTable.GetWin.Open

'Add as a table and add event theme to View

tableVTab = av.GetProject.FindDoc(tablelabel).GetVTab xField = theVTab.FindField("Lat") yField = theVTab.FindField("Lon") theSrc = XYName.Make(theVTab,yField,xField) tableTheme = Theme.Make(theSrc) theView.AddTheme(tableTheme) tableTheme.SetActive(true) theTheme.SetActive(false) 'Generate grid from point theme

aPrj = theView.GetProjection interpTheme = theView.GetActiveThemes.Get(0) theVTab = interpTheme.GetFTab zField = theVtab.GetFields.Get(4) barrierTheme = theView.FindTheme(barrier) barrierTheme.SetActive(true) barTheme = theView.GetActiveThemes.Get(1) barVTab = barTheme.GetFTab theInterp=Interp.MakeIDW(thePower,theRadius,barVTab) theResult=Grid.MakeByInterpolation(theVTab,aPrj,zField,theInterp,NIL) tableTheme.SetActive(false) barrierTheme.SetActive(false)

theGTheme = GTheme.Make(theResult) theView.AddTheme(theGTheme) customLegend = "\fldclimate\monthly.avl".AsFileName

'multiply by appropriate mask

maskTheme = theView.FindTheme(river)' maskTheme.SetActive(true) interpGrid = theGTheme.GetGrid maskGrid = maskTheme.GetGrid theMaskedGrid = (interpGrid * maskGrid) theMaskGridTheme = GTheme.Make(theMaskedGrid) theView.AddTheme(theMaskGridTheme) theMaskGridTheme.SetVisible(true) theThemeList = theView.GetThemes theThemeList.Shuffle(theThemeList.Get(0), (theThemeList.Count)) theView.InvalidateTOC(nil) theView.GetDisplay.Invalidate(true)' theGLegend = theMaskGridTheme.GetLegend' theGLegend.Load(customLegend,#LEGEND_LOADTYPE_ALL)' theMaskGridTheme.UpdateLegend' theMaskGridTheme.SetName(tablelabel)

'Merge Grids

theABRFCGrid = (theMaskedGrid.merge({theABRFCGrid})) theABRFCGridTheme = GTheme.Make(theABRFCGrid) theView.AddTheme(theABRFCGridTheme) theThemeList = theView.GetThemes theThemeList.Shuffle(theThemeList.Get(0), (theThemeList.Count)) theView.InvalidateTOC(nil) theView.GetDisplay.Invalidate(true)' theABRFCGridTheme.SetName(tablelabel) theABRFCGridTheme.SetVisible(true)

'Cleanup

' system.execute("cd \\fldclimate;rm"++river.AsString+theTheme.AsString)' theView.DeleteTheme(theGTheme) ' theView.DeleteTheme(theMaskGridTheme)' theView.DeleteTheme(tableTheme) if (num < counter) then theView.DeleteTheme(theABRFCGridTheme) else theGLegend = theABRFCGridTheme.GetLegend theGLegend.Load(customLegend,#LEGEND_LOADTYPE_ALL) theABRFCGridTheme.UpdateLegend theABRFCGridTheme.SetName(finlabel) end

end end

Avenue Script