Hydrodynamic modeling of stratified estuary: case study of the Jadro River (Croatia)

Ljubenkov, Igor

doi:10.1515/johh-2015-0001

Cited by 16 publications

(8 citation statements)

References 19 publications

(28 reference statements)

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“…In recent years, numerical methods for solving two-layer equations have received great attention and have been an object of intense research (Castro et al, 2001Kurganov and Petrova, 2009;Castro et al, 2010;Bouchut and Zeitlin, 2010;Fernández-Nieto et al, 2011;Canestrelli and Toro, 2012). A number of authors have presented different numerical schemes for non-conservative hyperbolic systems based on the finite-difference method (Fjordholm, 2012;Liu et al, 2015), finite-element method (Ljubenkov, 2015) or, more often, finite-volume method (FVM) (Castro et al, 2001;Kurganov and Petrova, 2009;Bouchut and Zeitlin, 2010;Canestrelli and Toro, 2012).…”

Section: Introductionmentioning

confidence: 99%

Analytical implementation of Roe solver for two-layer shallow water equations with accurate treatment for loss of hyperbolicity

Krvavica

Tuhtan

Jelenić

2018

Advances in Water Resources

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A new implementation of the Roe scheme for solving two-layer shallow-water equations is presented in this paper. The proposed A-Roe scheme is based on the analytical solution to the characteristic quartic of the flux matrix, which is an efficient alternative to a numerical eigensolver. Additionally, an accurate method for maintaining the hyperbolic character of the governing system is proposed. The efficiency of the quartic closed-form solver is examined and compared to numerical eigensolvers. Furthermore, the accuracy and computational speed of the A-Roe scheme is compared to the Roe, Lax-Friedrichs, GFORCE, PVM, and IFCP schemes. Finally, numerical tests are presented to evaluate the efficiency of the iterative treatment for the hyperbolicity loss. The proposed A-Roe scheme is as accurate as the Roe scheme, but much faster, with computational speeds closer to the GFORCE and IFCP scheme.

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Section: Introductionmentioning

confidence: 99%

Analytical implementation of Roe solver for two-layer shallow water equations with accurate treatment for loss of hyperbolicity

Krvavica

Tuhtan

Jelenić

2018

Advances in Water Resources

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“…Two-layer shallow water models have been previously applied and validated for the Neretva River Estuary (Ljubenkov and Vranješ, 2012) and several other microtidal estuaries (Ljubenkov, 2015;Krvavica et al, 2016b). The numerical results in the Neretva River Estuary showed a good agreement with salinity measurements throughout the year, under a wide range of hydrological conditions (Ljubenkov and Vranješ, 2012).…”

Section: Numerical Model Validationmentioning

confidence: 91%

Assessment of sea-level rise impacts on salt-wedge intrusion in idealized and Neretva River Estuary

Krvavica

Ružić

2020

Estuarine, Coastal and Shelf Science

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Understanding the response of estuaries to sea-level rise is crucial in developing a suitable mitigation and climate change adaptation strategy. This study investigates the impacts of rising sea levels on salinity intrusion in saltwedge estuaries. The sea-level rise impacts are assessed in idealized estuaries using simple expressions derived from a two-layer hydraulic theory, and in the Neretva River Estuary in Croatia using a two-layer time-dependent model. The assessment is based on three indicators -the salt-wedge intrusion length, the seawater volume, and the river inflows needed to restore the baseline intrusion. The potential SLR was found to increase all three considered indicators.Theoretical analysis in idealized estuaries suggests that shallower estuaries are more sensitive to SLR. Numerical results for the Neretva River Estuary showed that SLR may increase salt-wedge intrusion length, volume, and corrective river inflow. However, the results are highly non-linear because of the channel geometry, especially for lower river inflows. A theoretical assessment of channel bed slope impacts on limiting a potential intrusion is therefore additionally discussed. This findings emphasize the need to use several different indicators when assessing SLR impacts.

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“…Concerning the river forcing, 54 river flows in total (only 49 for the 1 km grid) are imposed over at least six grid points each (and 18 grid points for the Po river delta), with river mouths located along the coastline of the Italian peninsula, Sicily, Croatia, Slovenia, Albania, Montenegro, and Greece. The monthly climatology of the river flow is acquired from the RivDis database (Vörösmarty et al, 1996) and studies from Pano and Abdyli (2002), Malačič and Petelin (2009), Pano et al (2010), Janeković et al (2014), andLjubenkov (2015), whereas the river flow interannual variability is obtained from Ludwig et al (2009). Additionally, the river flows are linearly distributed between the first 20 sigma vertical levels -i.e.…”

Section: Adrisc Climate Modelmentioning

confidence: 99%

Performance of the Adriatic Sea and Coast (AdriSC) climate component – a COAWST V3.3-based one-way coupled atmosphere–ocean modelling suite: ocean results

2021

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Abstract. In this study, the Adriatic Sea and Coast (AdriSC) kilometre-scale atmosphere–ocean climate model covering the Adriatic Sea and northern Ionian Sea is presented. The AdriSC ocean results of a 31-year-long (i.e. 1987–2017) climate simulation, derived with the Regional Ocean Modeling System (ROMS) 3 km and 1 km models, are evaluated with respect to a comprehensive collection of remote sensing and in situ observational data. In general, it is found that the AdriSC model is capable of reproducing the observed sea surface properties, daily temperatures and salinities, and the hourly ocean currents with good accuracy. In particular, the AdriSC ROMS 3 km model demonstrates skill in reproducing the main variabilities of the sea surface height and the sea surface temperature, despite a persistent negative bias within the Adriatic Sea. Furthermore, the AdriSC ROMS 1 km model is found to be more capable of reproducing the observed thermohaline and dynamical properties than the AdriSC ROMS 3 km model. For the temperature and salinity, better results are obtained in the deeper parts than in the shallow shelf and coastal parts, particularly for the surface layer of the Adriatic Sea. The AdriSC ROMS 1 km model is also found to perform well in reproducing the seasonal thermohaline properties of the water masses over the entire Adriatic–Ionian domain. The evaluation of the modelled ocean currents revealed better results at locations along the eastern coast and especially the northeastern shelf than in the middle eastern coastal area and the deepest part of the Adriatic Sea. Finally, the AdriSC climate component is found to be a more suitable modelling framework to study the dense water formation and long-term thermohaline circulation of the Adriatic–Ionian basin than the available Mediterranean regional climate models.

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Hydrodynamic modeling of stratified estuary: case study of the Jadro River (Croatia)

Cited by 16 publications

References 19 publications

Analytical implementation of Roe solver for two-layer shallow water equations with accurate treatment for loss of hyperbolicity

Analytical implementation of Roe solver for two-layer shallow water equations with accurate treatment for loss of hyperbolicity

Assessment of sea-level rise impacts on salt-wedge intrusion in idealized and Neretva River Estuary

Performance of the Adriatic Sea and Coast (AdriSC) climate component – a COAWST V3.3-based one-way coupled atmosphere–ocean modelling suite: ocean results

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