The Coastal Modeling System Flow Model (CMS-Flow): Past and Present

Reed, Christopher W.; Brown, Mitchell E.; Sánchez, Alejandro; Wu, Weiming; Buttolph, Adele M.

doi:10.2112/si59-001.1

Cited by 26 publications

(15 citation statements)

References 3 publications

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“…These scenarios include testing1) sand engine technique that has recently been implemented in the Netherlands aiming to provide safety against flooding [22], and constructing a new channel from the sea to the Rosetta branch to provide the estuary with water discharges required for flush the accumulated sediments at the outlet of the River.…”

Section: Grid and Boundariesmentioning

confidence: 99%

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Environmentally- Friendly Proposals for Coastal Stability at Rosetta Promontory, Nile Delta

Masria¹,

Abdelaziz²

2017

J Marine Sci Res Dev

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The coastal zone of Nile Delta Coast is a dynamic system which was in equilibrium or experienced huge amounts of sediment transported with the water discharges transfer from Nile branches to the Mediterranean Sea. A remarkable decrease in the sediment discharges arises with the construction of barrages, low Aswan dam, and Aswan High Dam south of the Nile river at beginning of the 20th century which trapped almost all the flood sediments behind. Consequently, the coastal zone has suffered from shoreline erosion, particularly at Rosetta, El Burullus, and Damietta. Not only erosion is the main challenge facing this coastal zones, but also, siltation inside the inlets discharge to the sea.A depth-averaged model has been used after calibration and validation, to study morphological changes around the nourishment area at Rosetta promontory, and testing the validity of some alternatives proposed to mitigate the outlet problems. Among these alternatives: diversion of side channel from the sea to the Nile River, and finally, the sand motor technique.The aim of this paper is to test different proposed alternatives and analyze it in terms of morph-dynamic processes to reach an applicable solution for the instability of the promontory.

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Section: Grid and Boundariesmentioning

confidence: 99%

“…According to the initial observations, a redistribution of the sand nourishing the adjacent coasts performed. It is expected to be more economical, efficient and environmentally friendly than the traditional measures at long term Figure 7a [22].…”

Section: Sand Motor Techniquementioning

confidence: 99%

Environmentally- Friendly Proposals for Coastal Stability at Rosetta Promontory, Nile Delta

Masria¹,

Abdelaziz²

2017

J Marine Sci Res Dev

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“…The wave radiation stress and wave field information calculated by CMS-Wave are supplied to CMS-Flow for the flow and sediment transport calculations. Currents, water level, and morphology changes are fed into CMS-Wave to increase the accuracy of the wave transformation predictions [12][13][14].…”

Section: Numerical Modelmentioning

confidence: 99%

“…Additional model features include a grid nesting capability, wave run-up on the beach face, wave transmission through structures, wave overtopping, and storm wave generation. The CMS modeling system has been developed specifically for coastal applications for both long and short term studies [12]. The modeling system has been validated for the hydrodynamics, waves and sediment transport with analytical solutions, laboratory data and field measurements [11,17,18].…”

Section: Numerical Modelmentioning

confidence: 99%

Long-Term Morphological Modeling of Barrier Island Tidal Inlets

Styles

Brown

Brutsche

et al. 2016

JMSE

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The primary focus of this study is to apply a two-dimensional (2-D) coupled flow-wave-sediment modeling system to simulate the development and growth of idealized barrier island tidal inlets. The idealized systems are drawn from nine U.S. coastal inlets representing Pacific Coast, Gulf Coast and Atlantic Coast geographical and climatological environments. A morphological factor is used to effectively model 100 years of inlet evolution and the resulting morphological state is gauged in terms of the driving hydrodynamic processes. Overall, the model performs within the range of established theoretically predicted inlet cross-sectional area. The model compares favorably to theoretical models of maximum inlet currents, which serve as a measure of inlet stability. Major morphological differences are linked to inlet geometry and tidal forcing. Narrower inlets develop channels that are more aligned with the inlet axis while wider inlets develop channels that appear as immature braided channel networks similar to tidal flats in regions with abundant sediment supply. Ebb shoals with strong tidal forcing extend further from shore and spread laterally, promoting multi-lobe development bisected by ebb shoal channels. Ebb shoals with moderate tidal forcing form crescent bars bracketing a single shore-normal channel. Longshore transport contributes to ebb shoal asymmetry and provides bed material to help maintain the sediment balance in the bay.Within this conceptual framework, sediments are continually reworked through complex interactions between local waves, ebb shoal morphology and reversing tidal currents.Numerical models produce quantitative predictions and have been widely used to study the morphodynamics of tidal inlet systems on long time scales. Cayocca [3] used a two-dimensional (2-D) coupled wave, hydrodynamic, and sediment transport model to investigate the stability and potential evolution of the Arcachon Lagoon on the French Atlantic coast. In addition to simulating the lagoon with present-day bathymetry, Cayocca [3] conducted idealized simulations with an initial constant bathymetry to study long-term bay and inlet evolution. The results were consistent with historical observations and provided evidence that the lagoon was likely a stable feature under the present wave and tidal regime.Using a 2-D morphodynamic model, Dissanayake et al.[4] set up an idealized inlet system with dimensions similar to the Ameland Inlet in the Dutch Wadden Sea to simulate inlet evolution for periods of 50, 100, and 300 years. The model did not include wave forcing or Coriolis force, as the primary focus was to investigate inlet-cross-section growth rates and ebb shoal delta evolution. The results showed rapid ebb shoal growth and inlet channel deepening during the first 20 years followed by a longer period of weaker development, eventually stabilizing to an equilibrium asymptote. The ebb shoal lobe and main channel orientation were rotated from a shore-normal direction in agreement with the long-shore tidal circulation patterns in ...

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“…CMS (Coastal Modelling System), developed by the U.S. Army Corps of Engineers [1], [2] and MIKE, developed by the Danish Hydraulic Institute [3] are among the most popular commercial coastal morphodynamic models. Moreover, Open-telemac [4], as an open-source modelling suite, is also widely used.…”

Section: Introductionmentioning

confidence: 99%