# Presentation: 135215

## OHHI Beach Modeling Group Meeting - October 25, 2006

## OHHI Beach Closure Modeling Group Meeting - Agenda

8:00 Introduction and review of modeling approach (Schwab)

8:30 Report on National Beach Conference and needs of beach managers (Sonia Joseph)

8:50 Report on Oracle web collaboration tools for Beach Modeling Group (Lang)

9:00 Summary of 2006 activities (Break from 9:45-10:00, Lunch 11:30-12:30)

       1. Burns Ditch
          - Schwab/Beletsky/Lang
          - Whitman/Frick
       2. Grand Haven/Grand River
          - McCormick
          - Roberts
          - Phani
       3. Milwaukee Harbor area
          - Bravo/McLellan
       4. Other
          - Chin Wu

1:45-2:00 Break

2:00 Discussion of plans for 2007

3:00 Wrap-up 

- 8:00 Introduction and review of modeling approach (Schwab)
- 8:30 Report on National Beach Conference and needs of beach managers (Sonia Joseph)
- 8:50 Report on Oracle web collaboration tools for Beach Modeling Group (Lang)
- 9:00 Summary of 2006 activities (Break from 9:45-10:00, Lunch 11:30-12:30)
-        1. Burns Ditch
-           - Schwab/Beletsky/Lang
-           - Whitman/Frick
-        2. Grand Haven/Grand River
-           - McCormick
-           - Roberts
-           - Phani
-        3. Milwaukee Harbor area
-           - Bravo/McLellan
-        4. Other
-           - Chin Wu
- 1:45-2:00 Break
- 2:00 Discussion of plans for 2007
- 3:00 Wrap-up

## OHHI Beach Closure Modeling Group Dima Beletsky		UMHector Bravo		UWMShannon Briggs		MDEQTom Croley		NOAA/GLERLWalter Frick		USEPASheridan Haack		USGSGreg Lang		NOAA/GLERLSandra McLellan		UWMMike McCormick		NOAA/GLERLMeredith Nevers		USGSMantha Phanikumar	MSUPhil Roberts		GTU Dave Schwab		NOAA/GLERLRichard Whitman		USGSChin Wu			UWStephen Henderson	UM/CILER

## CEGLHH - Beach Closure Forecasting Group Activity Table

## Beach Closure Modeling Approach

-  Currents and temperatures
-  Waves
-  Meteorology
- Schwab

**Hydrology (Tributary Flow)**
-  USGS Streamflow
-  GLERL Models
- Croley, Phanikumar

**Pathogen Loading**
-  Tributaries
-  Shoreline NPS
-  Reuspension
- Haack, Whitman, Phanikumar, McLellan

**Nearshore Hydrodynamics and Waves**
-  POMGL
-  NearCOM?
- Beletsky, Schwab, Bravo, Wu

**Bacterial Transport and Fate**
-  Same grid as hydrodynamics?
-  Needs pathogen loading, near field mixing  & hydrodynamics
-  Lagrangian/ Eulerian?
- Phanikumar, Roberts, Frick, Whitman

**Beach Closure Model**
-  Probabilistic?
-  GUI/Communications
- Frick, Whitman

**Near Field Mixing**
-  Needs loadings and ambient conditions
- Roberts, Frick

**Beach Closure Modeling Approach**

## GLERL/CILER 2006 Progress

*Implemented and tested nested grid hydrodynamic model for Burns Ditch*
*Began development of nested grid hydrodynamic models for Milwaukee and Grand Haven*
*Conducted major field experiment at Grand Haven, Michigan*

## Lake Michigan Model Grids

**+**

**Lakewide grid**
**(POM model)**

**Burns Ditch nested model grid**

**Coupled models**
**nested grids**

**Lake Michigan Model Grids**

## Burns Ditch 100m computational grid

- 24 km

- 6 km

## 2005 Burns Ditch current meter deployment

- SonTek ADP

- RDI ADCP

- 2005 Burns Ditch current meter deployment

## 2006 Burns Ditch current meter deployment

## Burns Ditch nested grid model
 2005 hindcast (JD 121-340)

- Developed open boundary version of pomgl
- Extracted b.c.’s from 2 km L. Michigan whole-lake simulation (surface meteorology, currents, water levels, temperatures)
 Burns Ditch flow data obtained from USGS gage
 2-d (u,v substitution)
 3-d barotropic (inflow: substitution, outflow: radiation)
 3-d baroclinic (inflow: substitution, outflow:radiation, u,v,T)
 Validation with adcp data

- _ __2005 hindcast (JD 121-340)_
- - Developed open boundary version of pomgl
- - Extracted b.c.’s from 2 km L. Michigan whole-lake simulation (surface meteorology, currents, water levels, temperatures)
-  Burns Ditch flow data obtained from USGS gage
-  2-d (u,v substitution)
-  3-d barotropic (inflow: substitution, outflow: radiation)
-  3-d baroclinic (inflow: substitution, outflow:radiation, u,v,T)
-  Validation with adcp data

## Slide 13

## Burns Ditch nested grid model

- Surface water temperature

## Longshore currents (18 June - 7 August, 2005)

- Nested grid model (3-d)

- RDI ADCP

## Great Lakes Coastal Forecasting System - Operational Nowcast

- 20 day sample using vertically averaged currents

## Grand Haven 100 m computational grid

## Grand Haven SHOALS data

- Grand Haven bathymetric grid

## GLERL/CILER 2007 Plans

Operate Burns Ditch real-time nearshore circulation model
Continue Burns Ditch 2005 validation
Develop Grand Haven nested grid model
Incorporate bacterial dynamics model into nested grid model

- Operate Burns Ditch real-time nearshore circulation model
- Continue Burns Ditch 2005 validation
- Develop Grand Haven nested grid model
- Incorporate bacterial dynamics model into nested grid model

## CEGLHH - Beach Closure Forecasting Group Field Sites and Activities