Scientia Marina, Vol 76, No S1 (2012)

Water circulation forecasting in Spanish harbours


https://doi.org/10.3989/scimar.03606.18B

Manel Grifoll
Laboratori d’Enginyeria Marítima, Universitat Politècnica de Catalunya (LIM/UPC) and International Centre of Coastal Resources Research (CIIRC) , Spain

Gabriel Jordà
Institut Mediterrani d’Estudis Avançats (IMEDEA), UIB-CSIC , Spain

Marcos G. Sotillo
Puertos del Estado , Spain

Luis Ferrer
AZTI-Tecnalia, Marine Research Division , Spain

Manuel Espino
Laboratori d’Enginyeria Marítima, Universitat Politècnica de Catalunya (LIM/UPC) and International Centre of Coastal Resources Research (CIIRC) , Spain

Agustín Sánchez-Arcilla
Laboratori d’Enginyeria Marítima, Universitat Politècnica de Catalunya (LIM/UPC) and International Centre of Coastal Resources Research (CIIRC) , Spain

Enrique Álvarez-Fanjul
Puertos del Estado , Spain

Abstract


This paper describes the first harbour circulation forecasting system implemented in Spain. The configuration design was based on previous analyses of the morphologic and hydrodynamic behaviour of three harbours: Barcelona, Tarragona and Bilbao. A nested system of oceanic models was implemented, with a scope ranging from the regional scale (with a mean horizontal resolution of 5 km) to the harbour scale (with a mean horizontal resolution of 40 m). A set of sensitivity tests was carried out in order to determine the optimal configurations. The results of the operational system were compared with available observations, revealing that the intermediate models are able to reproduce the averaged hydrodynamic behaviour but not the spatio-temporal variability. With the harbour models the quality of the forecasts improves, reaching a correlation and RMSE of ~0.6 and 6 cm s–1, respectively, for Bilbao harbour. In addition, numerical experiments were carried out to evaluate the sensitivity of the forecasts to error sources. The results suggest that the errors in the information prescribed in the lateral boundary conditions are the most influential in the quality of the predictions. Errors in the wind field also have a smaller but non-negligible influence. Although the system is in the initial implementation phase and should be improved upon in the future, it is now a useful tool for harbour management. The predictions will be very helpful for harbour operations, pollution risk management and fighting oil spills.

Keywords


operational oceanography; harbour hydrodynamics; Barcelona harbour; Bilbao harbour; Tarragona harbour

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