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Enhancing EcoOBM for Efficient Physical Exchanges and Translating to Relevant Metrics

This update focuses on optimizing the Officer Box Model for physical exchanges. It allows fast run times, independence from ROMS, and long-term runs from 2001 to 2009. The model covers exchanges related to freshwater and salinity, involving gauged and ungauged rivers, WWTFs, and PPT. It offers insights on Chl-a concentration, Phyto NPP, and bottom DO with a stochastic simulation element. Funding for future studies and online model hosting capabilities are in progress.

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Enhancing EcoOBM for Efficient Physical Exchanges and Translating to Relevant Metrics

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  1. Update on EcoOBM (Officer Box Model, for Physical Exchanges) and Translation to Criteria-Relevant Metrics Mark Brush CHRP 2012 Managers’ Workshop

  2. Officer Box Model: exchanges = f (freshwater, salinity) • Fast run times • Exchanges independent of ROMS • Enables long term runs: 2001-09 • 7 gauged rivers • Ungauged area • extrapolated • WWTFs • PPT and Evaporation

  3. Box Model: Exchanges = f (freshwater, salinity) Insomniacs NuShuttle Buoys + +

  4. EcoOBM: Exchanges Compared to ROMS 2D box model 3D ROMS 2006 vs. Source Box Fraction of Water Rogers (2008) Box Model ROMS Destination Box

  5. EcoOBM: Surface Layer Chl-a mg m-3

  6. EcoOBM: Phyto NPP g C m-2 d-1

  7. EcoOBM: Bottom DO g m-3

  8. Stochastic Simulation Standard Run % Chance of Violations: 50% Load Reduction Bottom O2

  9. Empirical Linkages to Assess State Criteria: Temporal Variability Buoy Data

  10. Empirical Linkages to Assess State Criteria: Spatial Variability Insomniacs Data

  11. CHRP II Funding • Add 2010+ for a decade-long model run • (2001-2010+) • Compare OBM and ROMS exchanges for • 2007+(currently 2006 only) • Develop functions for salinity and pycnocline • depth vs. physical forcing (i.e. FW • loading); add variable hypsography • Scenario runs in collaboration with RI DEM • Online hosting of EcoOBM

  12. CHRP II Funding + selected runs in Greenwich Bay model to assess role of macroalgae in hypoxia

  13. Current EcoOBM Applications • Proposal pending: • Bush/Gundpowder Rivers, MD • Neuse River, NC • Pensacola/Escambia Bays, FL • Lake dissertation chapter: • Narr Bay vs. York River vs. New River (including MPB)

  14. Online Model Hosting Capability has been developed: http://www3.vims.edu/netsim/netsims/brush/wrr_model_apr_2011/index.html

  15. Online Model Hosting Capability has been developed: http://www3.vims.edu/netsim/netsims/brush/wrr_model_apr_2011/index.html

  16. Online Model Hosting Preliminary EcoOBM version:

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