Simulating sediment transport processes in San Pablo Bay using coupled hydrodynamic, wave, and sediment transport models

Bever, Aaron J.; MacWilliams, Michael L.

doi:10.1016/j.margeo.2013.06.012

Cited by 52 publications

(57 citation statements)

References 43 publications

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“…Erosion surfaces covered by sand or sand and shell debris, some in centimeter-scale strata, rest on silty clay. These features reflect the effects of waves and tides on bottom sediments in the shallow waters of the bay as discussed by Bever and MacWilliams (2013).…”

Section: Main Features Of the Sediments San Pablo Baysupporting

confidence: 55%

Description of gravity cores from San Pablo Bay and Carquinez Strait, San Francisco Bay, California

Woodrow¹,

Chin²,

Wong³

et al. 2017

Open-File Report

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Section: Main Features Of the Sediments San Pablo Baysupporting

confidence: 55%

Description of gravity cores from San Pablo Bay and Carquinez Strait, San Francisco Bay, California

Woodrow¹,

Chin²,

Wong³

et al. 2017

Open-File Report

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“…In this modeling framework, the 3-D UnTRIM hydrodynamic model is coupled to the Simulated WAves Nearshore (SWAN) wave model and the SediMorph seabed morphology model and runs as a fully-coupled 3-D hydrodynamic, wave, and sediment transport model. Detailed descriptions of the UnTRIM Bay-Delta hydrodynamic model and the coupled hydrodynamic, wave, and sediment transport model are provided in MacWilliams et al (2015) and Bever and MacWilliams (2013), respectively. Because the models are well documented in previous literature, this section only presents a general overview of the models.…”

Section: Turbidity Modelingmentioning

confidence: 99%

Influence of an Observed Decadal Decline in Wind Speed on Turbidity in the San Francisco Estuary

Bever¹,

MacWilliams²,

Fullerton³

2018

Estuaries and Coasts

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Turbidity is an important habitat component in estuaries for many fishes and affects a range of other ecological functions. Decadal timescale declines in turbidity have been observed in the San Francisco Estuary (Estuary), with the declines generally attributed to a reduction in sediment supply to the Estuary and changes to the erodible sediment pool in the Estuary. However, we analyzed hourly wind data from 1995 through 2015 and found statistically significant declines of 13 to 48% in wind speed around the Estuary. This study applied a 3-D hydrodynamic, wave, and sediment transport model to evaluate the effects of the observed decrease in wind speed on turbidity in the Estuary. The reduction in wind speed over the past 20 years was predicted to result in a decrease in turbidity of 14 to 55% in Suisun Bay from October through January. These results highlight that the observed declines in both wind speed and sediment supply over the past 20 years have resulted in reduced turbidity in the San Francisco Estuary from October through January. This decline in turbidity in Suisun Bay potentially has negative effects on habitat for fish like the endangered Delta Smelt which are more commonly caught in relatively turbid water.

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“…There are three widely known unstructured grid models: (1) the TELEMAC-MASCARET (Hervouet, 2007), (2) the Unstructured Tidal, residual, intertidal mudflat model (UnTRIM) (Casulli and Walters, 2000;Bever and MacWilliams, 2013) and (3) Delft3D Flexible Mesh (D3D FM) (Kernkamp et al, 2010). The first two models are purely triangle based and are not directly coupled (yet) with sediment transport and/or water quality and ecology models.…”

Section: Model Descriptionmentioning

confidence: 99%

“…6) and skill (skill; Fig. 6) (Bever and MacWilliams, 2013). The uRMSE indicates the variability of the model relative to the data and is zero when the model and data have equal variability.…”

Section: Sediment Fraction Analysismentioning

confidence: 99%

A 2-D process-based model for suspended sediment dynamics: a first step towards ecological modeling

Achete

Wegen

Roelvink

et al. 2015

Hydrol. Earth Syst. Sci.

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Abstract. In estuaries suspended sediment concentration (SSC) is one of the most important contributors to turbidity, which influences habitat conditions and ecological functions of the system. Sediment dynamics differs depending on sediment supply and hydrodynamic forcing conditions that vary over space and over time. A robust sediment transport model is a first step in developing a chain of models enabling simulations of contaminants, phytoplankton and habitat conditions.This works aims to determine turbidity levels in the complex-geometry delta of the San Francisco estuary using a process-based approach (Delft3D Flexible Mesh software). Our approach includes a detailed calibration against measured SSC levels, a sensitivity analysis on model parameters and the determination of a yearly sediment budget as well as an assessment of model results in terms of turbidity levels for a single year, water year (WY) 2011.Model results show that our process-based approach is a valuable tool in assessing sediment dynamics and their related ecological parameters over a range of spatial and temporal scales. The model may act as the base model for a chain of ecological models assessing the impact of climate change and management scenarios. Here we present a modeling approach that, with limited data, produces reliable predictions and can be useful for estuaries without a large amount of processes data.

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Simulating sediment transport processes in San Pablo Bay using coupled hydrodynamic, wave, and sediment transport models

Cited by 52 publications

References 43 publications

Description of gravity cores from San Pablo Bay and Carquinez Strait, San Francisco Bay, California

Description of gravity cores from San Pablo Bay and Carquinez Strait, San Francisco Bay, California

Influence of an Observed Decadal Decline in Wind Speed on Turbidity in the San Francisco Estuary

A 2-D process-based model for suspended sediment dynamics: a first step towards ecological modeling

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