Discontinuous hindcast simulations of estuarine bathymetric change: A case study from Suisun Bay, California

Ganju, Neil K.; Jaffe, Bruce E.; Schoellhamer, David H.

doi:10.1016/j.ecss.2011.04.004

Cited by 15 publications

(7 citation statements)

References 28 publications

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“…Similar to other 2DH numerical morphological studies (Daly et al, 2014;Ganju et al, 2009Ganju et al, , 2011Luijendijk et al, 2017;Ranasinghe et al, 2011), the Brier Skill Score (BSS) is used to compare the relative skill of different simulations. The skill score is defined in discrete form as…”

Section: Appendix a A1 Metrics For Validationmentioning

confidence: 99%

“…A wide range of metrics for model morphodynamic skill can be examined depending on the sediment transport quantities of interest, although interpreting these metrics often requires site-specific knowledge (Daly et al, 2014;Ganju et al, 2011;Luijendijk et al, 2017;Sutherland et al, 2004;and many others). Here qualitative metrics are used to give a sense of model skill on a case-by-case basis during storms.…”

Section: Validation Of Morphodynamicsmentioning

confidence: 99%

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Storm Impact on Morphological Evolution of a Sandy Inlet

2018

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Observations of waves, currents, and bathymetric change in shallow water (<10‐m depth) both inside and offshore of a migrating inlet with strong (2–3 m/s) tidal currents and complex nearshore bathymetry show over 2.5 m of erosion and accretion resulting from each of two hurricanes (offshore wave heights >8 m). A numerical model (Delft3D, 2DH mode) simulating waves, currents, and morphological change reproduces the observations with the inclusion of hurricane force winds and sediment transport parameters adjusted based on model‐data comparisons. For simulations of short hurricanes and longer nor'easters with identical offshore total time‐integrated wave energy, but different peak wave energies and storm durations, morphological change is correlated (R2 = 0.60) with storm intensity (total energy of the storm divided by the duration of the storm). Similarly, the erosion observed at the Sand Engine in the Netherlands is correlated with storm intensity. The observations and simulations suggest that the temporal distribution of energy in a storm event, as well as the total energy, impacts subsequent nearshore morphological change. Increased storm intensity enhances sediment transport in bathymetrically complex, mixed wave‐and‐tidal‐current energy environments, as well as at other wave‐dominated sandy beaches.

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Section: Appendix a A1 Metrics For Validationmentioning

confidence: 99%

Section: Validation Of Morphodynamicsmentioning

confidence: 99%

Storm Impact on Morphological Evolution of a Sandy Inlet

2018

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“…The wind-wave action is not included in current study. Future recommendation is to consider the wind-wave effect, especially when the sediment transport is included in the model [59].…”

Section: Discussionmentioning

confidence: 99%

Response of Salt Transport and Residence Time to Geomorphologic Changes in an Estuarine System

Liu

2020

Water

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Anthropogenic changes in tidal estuaries have significantly altered bathymetry and topography over the past half century. The geomorphic-driven changes in estuarine hydrodynamics and salt transport remain unclear. To explore this issue, a SELFE (Semi-implicit Eulaerian-Lagrangian Finite Element) -based model was developed and utilized in a case study in the Danshui River, Taiwan. The model was calibrated and validated using observed water level, current, and salinity data from 2015, 2016, and 2017. The performance of the SELFE model corresponded well to the measured data. Furthermore, the validated model was utilized to analyze the hydrodynamics, residual current, limit of salt intrusion, and residence time under the predevelopment (1981) and present (2015) conditions. The predicted results revealed that the time lag of water surface elevation at both high tide and low tide under the present condition was approximately 0.5–2 h shorter under the predevelopment condition. The residual circulation under the predevelopment condition was stronger than under the present condition for low flow, causing the limit of salt intrusion to extend further upstream under the predevelopment condition compared to the limit of salt intrusion under the present condition. The calculated residence time under the predevelopment condition was longer than the residence time under the present condition. The freshwater discharge input is a dominating factor affecting the salt intrusion and residence time in a tidal estuary. A regression correlation between the maximum distance of salt intrusion and freshwater discharge and a correlation between residence time and freshwater discharge were established to predict the limit of salt intrusion and residence time under the predevelopment and present conditions with different scenarios of freshwater discharge input.

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“…In the Netherlands, 400 year regular bathymetric surveys at the Texel Inlet of the Wadden Sea have provided a unique long-term dataset (Elias and van der Spek, 2006). Although the accuracy of very early surveys before the 1800s may be low, nautical charts since the 19th century were considered to be adequate for quantitative research (Wolanski et al, 2001;Van der Wal et al, 2002;Thomas et al, 2002;Van der Wal and Pye, 2003;Klingbeil and Sommerfield, 2005;Blott, et al, 2006;Burningham, 2008;Li et al, 2011;Ganju et al, 2011). The accuracy and quality of these nautical charts also depend on the number and density of elevation points along the traverse lines used in the map construction.…”

Section: Nomentioning

confidence: 98%