Modeling circulation patterns induced by spatial cross-shore wind variability in a small-size coastal embayment

Cerralbo, Pablo; Espino, Manuel; Grifoll, Manel

doi:10.1016/j.ocemod.2016.05.011

Cited by 15 publications

(20 citation statements)

References 46 publications

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“…The differences between these results and previous studies may be due to the arbitrary selection of the bay mouth section, sensitivity to salinity and freshwater flows used in the box model and the location of the ADCP. In this sense, the variability of the flow through the mouth section has been demonstrated to be high in Cerralbo et al (2016). However, the simple methods consider that all water particles have the same transit time through the entire control volume (Takeoka, 1984).…”

Section: Discussionmentioning

confidence: 99%

“…Numerical aspects are described in detail in Shchepetkin and McWilliams (2005), and a complete description of the model, with 20 documentation and code is available at the ROMS website: http://myroms.org. Previous implementation for the model in Alfacs Bay showed a good skill assessment compared to currents, sea level and water temperature variables (Cerralbo et al, 2016).…”

Section: Numerical Modelmentioning

confidence: 99%

“…However, these methods are not useful when large variations in hydrodynamics occur 5 (Jouon et al, 2006). In this sense, previous studies on the Alfacs Bay hydrodynamics have highlighted the relevance of hydrodynamic spatial variability associated with seiches (Cerralbo et al, 2014), winds , Cerralbo et al, 2016 and gravitational circulation .…”

Section: Water Residence Times 15mentioning

confidence: 99%

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Use of a hydrodynamic model for the management of the water renovation in a coastal system

Cerralbo¹,

Balsells²,

Mestres³

et al. 2018

Preprint

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Abstract. In this contribution we investigate the hydrodynamic response in Alfacs Bay (Delta Ebro, NW Mediterranean Sea) to different anthropogenic modifications in freshwater flows and inner bay-open sea connections. The fresh water, coming from rice field irrigation, contains nutrients and pesticides and therefore affects in multiple ways the productivity and water quality of the bay. The application of a nested oceanographic circulation modelling suite within the bay provides objective information to solve water quality problems that are becoming more acute due to temperature and phytoplankton concentration peaks during the summer period, when sea water may exceed 28 ˚C leading high rates of mussels mortality and therefore a significant impact on the local economy. The effects of different management solutions (like a connection channel between the inner bay and open sea) are hydro-dynamically modelled in order to diminish residence times (e-flushing time) and water temperatures. The modelling system, based on the Regional Ocean Modelling System (ROMS), consists in a set of nested domains using data from CMEMS-IBI for the initial and open boundary conditions (coarser domain). One full year (2014) of simulation is used to validate the results showing low errors with SST and good agreement with surface currents. Finally, a set of twin numerical experiments during the summer period (when water temperature reaches 28 ˚C) are used to analyse the effects of proposed nature-based interventions. Although these actions modify water temperature in the water column, the decrease in SST is not high enough to avoid high temperatures during some days preventing eventual mussel mortality during summer in the shallowest regions. However, the proposed management actions reveal their effectiveness in diminishing water residence times along the entire bay, thus preventing the inner areas to have low renovation and the corresponding ecological problems.

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Section: Discussionmentioning

confidence: 99%

Section: Numerical Modelmentioning

confidence: 99%

Section: Water Residence Times 15mentioning

confidence: 99%

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Use of a hydrodynamic model for the management of the water renovation in a coastal system

Cerralbo¹,

Balsells²,

Mestres³

et al. 2018

Preprint

Self Cite

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“…Tidal ranges during spring tides reach around 0.2 m, and the hydrodynamic fluctuations are controlled by the wind and modulated by the seiche activity during short periods (Cerralbo et al, 2015a). Both wind and salinity gradients due to freshwater discharge dominate the water circulation in the low-frequency band (Solé et al, 2009;Cerralbo et al, 2018). Intense regional winds from the north and northwest and orographic effects result in wind jets in the Ebro River valley (Grifoll et al, 2015(Grifoll et al, , 2016.…”

Section: Study Areamentioning

confidence: 99%

“…The bay area is intensively exploited by commercial activities, including tourism, fishing, and aquaculture; hence, the ecosystem has a significant economic importance. In the past, the bay has been extensively investigated in terms of its hydrodynamic response (Solé et al, 2009;Llebot et al, 2014;Cerralbo et al, 2015aCerralbo et al, , 2016Cerralbo et al, , 2018, tidal wave propagation (Cerralbo et al, 2014), biochemical processes (Llebot et al, 2010(Llebot et al, , 2011, and optical water properties (Ramírez-Pérez et al, 2017). The estuary mainly receives freshwater discharge from the rice fields on the Ebro River.…”

Section: Introductionmentioning

confidence: 99%

Characterization of bottom sediment resuspension events observed in a micro-tidal bay

et al. 2019

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Abstract. In this study we investigate the variability in near-bottom turbidity in Alfacs Bay (in the northwestern Mediterranean Sea). The bay is characterized by a micro-tidal environment and seiching activity that may lead to flow velocities of more than 50 cm s−1. A set of current meters and optical sensors were mounted near the sea bottom to acquire synchronous hydrodynamic and optical information from the water column. The time-series observations showed an evident relation between seiche activity and sediment resuspension events. The observations of turbidity peaks are consistent with the node–antinode location of the fundamental and first resonance periods of the bay. The implementation of a coupled wave–current numerical model shows strong spatial variability of the potential resuspension locations. Strong wind events are also a mechanism responsible for the resuspension of fine sediment within the bay. This is confirmed by suspended sediment concentration maps derived from Sentinel-2 satellite imagery. We suggest that the sequence of resuspension events plays an important role in the suspended sediment concentration, meaning that the occurrence of sediment resuspension events may increase the suspended sediment in subsequent events. The suspended sediment events likely affect the ecological status of the bay and the sedimentary process over a long-term period.

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Wave influence on altimetry sea level at the coast

Ondoa

Birol

Almar

et al. 2023

Coastal Engineering

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Modeling circulation patterns induced by spatial cross-shore wind variability in a small-size coastal embayment

Cited by 15 publications

References 46 publications

Use of a hydrodynamic model for the management of the water renovation in a coastal system

Use of a hydrodynamic model for the management of the water renovation in a coastal system

Characterization of bottom sediment resuspension events observed in a micro-tidal bay

Wave influence on altimetry sea level at the coast

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