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Distributed Modeling

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

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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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