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

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Presentation on theme: "Update on EcoOBM (Officer Box Model, for Physical Exchanges) and Translation to Criteria- Relevant Metrics Mark Brush CHRP 2012 Managers’ Workshop."— Presentation transcript:

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 InsomniacsNuShuttle + Buoys + Box Model: Exchanges = f (freshwater, salinity)

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

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 Bottom O 2 Standard Run 50% Load Reduction Criterion: 40 ug/l30 ug/l20 ug/l Std Run3.412.733.8 50% Load1.46.523.9 % Chance of Violations: Stochastic Simulation

9 Mean DO Minimum DO % Non- Compliance 10.7 ± 0.0399.6 21.4 ± 0.0597.2 32.2 ± 0.0691.6 43.1 ± 0.0678.7 54.1 ± 0.0763.2 65.0 ± 0.0846.0 76.0 ± 0.0934.6 87.0 ± 0.1024.1 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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