A FVCOM-based unstructured grid wave, current, sediment transport model, I. Model description and validation

Wu, Lunyu; Chen, Changsheng; Peifang, Guo; Shi, Maochong; Qi, Jianhua; Ge, Jianzhong

doi:10.1007/s11802-011-1788-3

Cited by 65 publications

(44 citation statements)

References 29 publications

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“…[] and Wu et al . []. In addition, the surface drag coefficient is calculated by

C_{d} = {[κ / l n (10 / z_{o})]}^{2}

where the von Karman constant κ = 0.41 and z o is the sea surface roughness calculated using Donelan's parameterization [ Donelan et al ., ] given as

z_{o} = 3.7 \times 10^{- 5} \frac{U_{10}^{2}}{g} {true(\frac{U_{10}}{C_{p}} true)}^{0.9}

where C p is the phase velocity of the peak frequency wave, U 10 is the 10 m wind speed and U 10 / C p is defined as the wave age.…”

Section: Necofs Inundation Model Systemmentioning

confidence: 99%

Coastal flooding in Scituate (MA): A FVCOM study of the 27 December 2010 nor'easter

Beardsley

Chen

2013

J. Geophys. Res. Oceans

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[1] A nested Finite-Volume Coastal Ocean Model (FVCOM) inundation forecast model has been developed for Scituate (MA) as part of the Northeast Coastal Ocean Forecast System (NECOFS). Scituate Harbor is a small coastal lagoon oriented north-south with a narrow entrance (with opposing breakwaters) opening eastward onto Massachusetts Bay and the Gulf of Maine. On 27 December 2010, a classic nor'easter produced a 0.9 m high surge, which when added to the 1.5 m high tide and seasonal higher mean water level, produced significant inundation in Scituate. The Scituate FVCOM inundation model includes flooding/drying, seawall/breakwater, and wave-current interaction capabilities, and was driven by one-way nesting with NECOFS. Hindcasts of the 27 December nor'easter event were made with two different resolution Scituate FVCOM grids with and without inclusion of wave-current interaction to examine the influence of spatial resolution and model dynamics on the predicted flooding. In all simulations, a wind-driven coastal current flowed southward across the harbor entrance, with an attached separation eddy forming downstream of the northern breakwater and rapid decrease in wave energy entering the harbor. With wave-current interaction, the southward coastal current was strongly enhanced and currents within the separation eddy increased to more than 1 m/s, making it highly nonlinear with large lateral shears. Comparisons of the model water elevation time series with harbor tide station measurements showed that inclusion of wave-current interaction increased the peak model surge by 8 cm, in closer agreement with the observed peak.

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“…[] and Wu et al . []. In addition, the surface drag coefficient is calculated by

C_{d} = {[κ / l n (10 / z_{o})]}^{2}

where the von Karman constant κ = 0.41 and z o is the sea surface roughness calculated using Donelan's parameterization [ Donelan et al ., ] given as

z_{o} = 3.7 \times 10^{- 5} \frac{U_{10}^{2}}{g} {true(\frac{U_{10}}{C_{p}} true)}^{0.9}

where C p is the phase velocity of the peak frequency wave, U 10 is the 10 m wind speed and U 10 / C p is defined as the wave age.…”

Section: Necofs Inundation Model Systemmentioning

confidence: 99%

Coastal flooding in Scituate (MA): A FVCOM study of the 27 December 2010 nor'easter

Beardsley

Chen

2013

J. Geophys. Res. Oceans

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“…NECOFS includes three model components: (1) a mesoscale meteorological model (MM5/WRF) [Chen et al, 2005]; (2) FVCOM [Chen et al, 2003[Chen et al, , 2011a[Chen et al, , 2011b; and (3) SWAVE [Qi et al, 2009]. FVCOM was coupled with SWAVE through the traditional radiation stress approach [Wu et al, 2010]. MM5 is the fifth-generation NCAR/Penn State nonhydrostatic mesoscale model [Dudhia and Bresch, 2002], and WRF is the newer Weather Research and Forecast model [Skamarock and Klemp, 2008].…”

Section: Necofsmentioning

confidence: 99%

Impact of current‐wave interaction on storm surge simulation: A case study for Hurricane Bob

et al. 2013

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[1] Hurricane Bob moved up the U.S. east coast and crossed over southern New England and the Gulf of Maine [with peak marine winds up to 54 m/s (100 mph)] on 19-20 August 1991, causing significant damage along the coast and shelf. A 3-D fully wave-currentcoupled finite-volume community ocean model system was developed and applied to simulate and examine the coastal ocean responses to Hurricane Bob. Results from process study-oriented experiments showed that the impact of wave-current interaction on surge elevation varied in space and time, more significant over the shelf than inside the inner bays. While sea level change along the coast was mainly driven by the water flux controlled by barotropic dynamics and the vertically integrated highest water transports were essentially the same for cases with and without water stratification, the hurricane-induced wave-current interaction could generate strong vertical current shear in the stratified areas, leading to a strong offshore transport near the bottom and vertical turbulent mixing over the continental shelf. Stratification could also result in a significant difference of water currents around islands where the water is not vertically well mixed.

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“…Configured with the nonoverlapped unstructured triangular grid, the high‐resolution CE‐FVCOM provided a better resolution of the geometry of the CE, which featured a multiple channel system with complex irregular coastlines and islands [ Chen et al ., ; Xue et al ., ; Ge et al ., ]. The current version of the CE‐FVCOM used in this study was a fully coupled current‐wave‐sediment system, with an unstructured‐grid surface wave model [ Qi et al ., ; Wu et al ., ] and the sediment model (FVCOM‐SED) converted from the USGS community sediment transport model formulation [ Warner et al ., ; Chen et al ., ]. The FVCOM‐SED included the cohesive process of the sediment settling (see Appendix for details).…”

Section: An Integrated Goci‐model Methods To Estimate τCementioning

confidence: 99%

Estimation of critical shear stress for erosion in the Changjiang Estuary: A synergy research of observation, GOCI sensing and modeling

Shen

Guo

et al. 2015

JGR Oceans

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Simulating the sediment transport in a high‐turbidity region with spatially varying bed properties is challenging. A comprehensive strategy that integrates multiple methods is applied here to retrieve the critical shear stress for erosion, which plays a major role in suspended sediment dynamics in the Changjiang Estuary (CE). Time‐series of sea surface suspended sediment concentration (SSC) were retrieved from the Geostationary Ocean Color Imager (GOCI) satellite data at hourly intervals (for 8 h each day) and combined with hydrodynamic modeling of high‐resolution CE Finite‐Volume Community Ocean Model (CE‐FVCOM) to estimate the near‐bed critical shear stress in the clay‐dominated bed region (plasticity index > 7%). An experimental algorithm to determine the in situ critical shear stress via the plasticity index method was also used to verify the GOCI‐derived critical shear stress. Implemented with this new critical shear stress, the sediment transport model significantly improved the simulation of the distribution and spatial variability of the SSC during the spring and neap tidal cycles in the CE. The results suggest that a significant lateral water exchange between channels and shoals occurred during the spring flood tide, which led to a broader high‐SSC area in the CE throughout the water column.

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A FVCOM-based unstructured grid wave, current, sediment transport model, I. Model description and validation

Cited by 65 publications

References 29 publications

Coastal flooding in Scituate (MA): A FVCOM study of the 27 December 2010 nor'easter

Coastal flooding in Scituate (MA): A FVCOM study of the 27 December 2010 nor'easter

Impact of current‐wave interaction on storm surge simulation: A case study for Hurricane Bob

Estimation of critical shear stress for erosion in the Changjiang Estuary: A synergy research of observation, GOCI sensing and modeling

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