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Distributed Modeling

Explore the current status, terminology, and recommendations for the implementation of distributed modeling components for forecasting in the context of the HIC Conference 2008. Discover the migration of HL-RDHM elements into CHPS and ongoing work in SAC parameterization and snow science. Collaboration with NASA and the assimilation of snow cover data are key focus areas for research and development.

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Distributed Modeling

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  1. Distributed Modeling Mike Smith HIC Conference July 29, 2008

  2. Current Status and Terminology AWIPS DHM HL-RDHM DHM-TF P& ET P, T & ET (Forecast) Auto Calibration SNOW -17 rain rain + melt SAC-SMA ICP SAC-SMA, SAC-HT surface runoff surface runoff base flow base flow Hillslope routing Hillslope routing Channel routing Channel routing Mods Flows and state variables Flows and state variables Calibration Forecasting

  3. DHM-TF • Components are in HL-RDHM • Independent of rainfall/runoff model • Forecasting capability • Available on AWIPS LAD mid-August • Prototype testing at WFO Sterling (Ernie Wells coordinating) HIC Conference July 29-31, 2008

  4. Recommendations for Implementation • Use with, not instead of, lumped model at same time step • Part of natural progression to finer scales Lumped 6-hr Lumped 1-hour Distributed 1-hour • Calibration is good training process for forecasting • Current: • DHM: operation in NWS for headwaters, locals • HL-RDHM: Large area, soil moisture, FFG, etc • Feedback to OHD HIC Conference July 29-31, 2008

  5. Migration of HL-RDHM Components into CHPS • Extract components of HL-RDHM; put into CHPS • No ‘wrapper’ • Define requirements for gridded data • Collaborate with Deltares, HSEB, and HEP group Source: Distributed Model Operations Concept HIC Conference July 29-31, 2008

  6. Current Work • SAC parameterization • Modifications in dry areas, new value of ZPERC, derivation of SSURGO-based parameters • Snow-17 parameterization • UADJ, MFMAX, MFMIN • Routing of subsurface flows • UCI PhD candidate Behnaz Khakbaz • Snow Science Steering Team • Need to react to Eric Anderson’s emails • DMIP 2 • DHM-TF • Prototype testing, further science development • Collaboration with NASA • Assimilation of snow covered area, derivation of daily PE • Migration to CHPS

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