Using COAWST in the development of a high resolution operational oceanographic & oil spill

system in Santander Bay (Spain)S. Castanedo1, B. Perez-Diaz1, A. J. Abascal1, M. Cardenas1, M. Olabarrieta1, R. Medina1, J. Receveur2, E.

Evrard2, J. Guyomarch2

1Environmental Hydraulics Institute, Universidad de Cantabria (Spain)2Centre de documentation, de recherche et d'expérimentations sur les pollutions accidentelles des eaux, CEDRE (France)

COAWST Modeling System TrainingWoods Hole, MA, USA | August 25-28

1. INTRODUCTION

Framework

SPRES project, co-funded by the European Transnational Programme Duration of the project 2.5 years (9/01/2012 – 9/07/2014)

Total budget:≈1.8 M€ (ERDF co-financing rate: 65%)

1. INTRODUCTION

Objective

1

2

3

4

• Operational forecasting systems (HR-OOS)

• Oil spill risk assessment tools

- local scale - (estuaries and ports)

Santander Bay

1. INTRODUCTION

Santander

Puntal spit

Sardinero Beach

Santander Port

Miera river

Airport

hmax of 10–12 m

2270 ha (65% intertidal areas)250,000 inhabitants

3.5 km

0.8 km

• Mean tide range = 3 m• Spring tide range = 5 m• Daily mean fresh water discharge = 8 m3/s• Mean Hs= 1m• Typical winter storm wave: Hs=5 m.

Atmospheric data(AEMET)

Ocean data(MyOcean)

FTP FTP

Data preprocessing

Wind, SLP,Heat fluxes

Sea level,2D currents, T, S

COAWST model2 day forecast of ocean variables

TESEO model

WindMarine forecast

mapsSpill

characteristicsOil spill

trajectory forecast

2 day forecast of spill trajectories

HR-OOM

HR-OSM

2. SYSTEM SETUP

MyOcean – IBI

2. SYSTEM SETUP

INITIAL AND OPEN BOUNDARY CONDITIONS

dt: 1 hour (2D), 1 day (3D)dx: 1/36ºdz: 50 layersForecast: 5 days

• Sea level• 3D T and 3D S• 2D currents• 3D currents

ATMOSPHERIC FORCING

• Wind fields and SLP• Heat Fluxes

dt: 1 hour dx: 15 kmForecast: 72 hr

GRIDS: Dynamic downscalingMYOCEAN-IBI GRID (1/36°)

GRID NAMEHorizontal

cell Vertical levels Cell size (m)

Intermediate grid 560x105 5 230

Local grid 256x281 5 45

INTERMEDIATE GRID

LOCAL GRID

2. SYSTEM SETUP

• Two-way nesting• Horiz.: cartesian coord.• Vert.: Sigma coord.

Atmospheric data(AEMET)

Ocean data(MyOcean)

FTP FTP

Data preprocessing

Wind, SLP,Heat fluxes

Sea level,2D currents, T, S

COAWST model2 day forecast of ocean variables

TESEO model

WindMarine forecast

mapsSpill

characteristicsOil spill

trajectory forecast

2 day forecast of spill trajectories

HR-OOM

HR-OSM

2. SYSTEM SETUP

3. VALIDATION

• HR-OOM

• HR-OSM

Calibration/validation of COAWST

Calibration/validation of TESEO

Bottom friction coefficient

Horizontal and vertical turbulence models

Transport module: wind drag, wave and diffusion coefficients

Weathering module: weathering coefficients

3. VALIDATION

• HR-OOM Calibration/validation of COAWSTData:

• Permanent tide gauge operated by PdE located in the entrance of the Bay

• River flow: flow meter operated by CHC (0.5 m3/s (summer camp.); 4.1 m3/s (winter camp.))

• Hydrodynamic campaigns: (1) Summer (17/07/2012 – 06/08/2012); (2) Winter (07/03/2013 – 25/03/2013)

Equipment:• Tide gauges• Micro-pressure sensors• Current profilers• Temperature and salinity sensors

3. VALIDATION

• HR-OOMMETHOD

• To obtain the optimal hydrodynamic model parameters, comparing modeled results with observed values

• Statistical descriptors: root mean square error (RMSE), correlation index (ρ) and the skill index.Winter campaign (2013)

Calibration/validation of COAWST

Sea level Depth integrated current

3. VALIDATION

• HR-OOM Calibration/validation of COAWST

Summer campaign; Equipment: Aquadop (C3). a) Free surface elevation; b) depth average current velocity.

48 hours forecast of hourly:• Sea level• 3D and 2D currents• 3D T and S

4. RESULTS

• HR-OOM

• HR-OSM

48 hours forecast:• Oil spill trajectory (real or hypothetical)• Oil spill weathering

SPRES WEB SERVICE

WEATHERING FORECAST

GOOGLE AND GIS FORMAT

DAILY PREDICTIONS: CURRENTS

To increase wind data resolution

To include waves modeling

To include river flow input

To continue validating the system with measured data.

To increase grid resolution: curvilinear grid

Future work