Download - SSHP with VAR Capabilities
SSHP with VAR CapabilitiesTracy Howieson
WGRFCAugust 8, 2007
Project ScopeFunded by the 2006 Hurricane SupplementalIncorporates VAR capabilities to update SAC-SMA
states for SSHPAvailable SAC-SMA state adjustments
RFC Transferred States Unadjusted States VAR Adjusted States
VAR capabilities allow WFO to maintain SAC-SMA states without overhead from RFC
WGRFC to test VAR results and new SSHP functionalitySelect WFO’s to test functionality before national
deployment
VAR Variational Assimilation ProgramAdjusts soil moisture states for SAC-SMA by
assimilating to the following data sets:Initial SAC-SMA StatesMean Areal Precipitation (MAPX)Mean Areal Potential Evaporation (MAPE)Stream flow
VAR adjusts the SAC-SMA state variables and the MAPX and MAPE estimates such that the resulting model simulation matches the observed.
RFC Transfer StatesRFC tasks for producing SAC-SMA States for
SSHPDevelop 1-hr models in OFS for all SAC-SMA
SSHP locationsRFC run 1-hr models daily to ensure accurate
states Not currently done at most RFCs
RFC transfer SAC-SMA states once a day to WFO Transfer capability in existing SSHP
This requires considerable overhead on RFC staff
VAR Updating of SAC-SMA StatesWFO would be able to select to update SAC-
SMA states locally using the VAR capabilityProduces two different time series
VAR Adjusted Unadjusted VAR
VAR runs hourly from cronRFC states update once daily
VAR process creates time series and stores results in the fcst_discharge data base table.
User can select desired time series to base forecast on
UVAT2 July 21, 2007 12ZUnadjusted VAR Time
Series Adjusted VAR Time Series
UVAT2 July 21, 2007 13ZUnadjusted VAR Time
Series Adjusted VAR Time Series
UVAT2 July 21, 2007 14ZUnadjusted VAR Time
Series Adjusted VAR Time Series
UVAT2 July 21, 2007 15ZUnadjusted VAR Time
Series Adjusted VAR Time Series
UVAT2 July 21, 2007 16ZUnadjusted VAR Time
Series Adjusted VAR Time Series
UVAT2 July 21, 2007 17ZUnadjusted VAR Time
Series Adjusted VAR Time Series
UVAT2 July 21, 2007 18ZUnadjusted VAR Time
Series Adjusted VAR Time Series
UVAT2 July 21, 2007 19ZUnadjusted VAR Time
Series Adjusted VAR Time Series
Current Testing ResultsDatabase Issues
Processes not finishing before next process initiated Crashed database during flood event
Developer has made changes to account for this issue
VAR Fortran ProgramVAR does not run successfully but a time series
is created and stored in databaseDeveloper is working with VAR scientist to
rectify
WGRFC providing feedback on GUI functionality
Future WorkIncorporate routing operation to allow for
non-headwater locationsLag/K method
Incorporate current work in VAR project Handling timing errors due to unit hydrograph
Target Date for deploymentOB 9
Live Demonstration