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SFBD - 2D model


A 2D sediment transport model covering the Bay-Delta system. 2D flow runs were carried out by Delft3D FM while DELWAQ used D3D FM output to calculate sediment transport patterns offline


Model Description

This model was developed to determine turbidity levels in the complex-geometry delta of the San Francisco estuary using a process-based approach (Delft3D Flexible Mesh for flow dynamics in combination with DELWAQ for sediment dynamics). The model was calibrated against measured SSC levels for WY2011. 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 processed data


The software, the model, and its input conditions are publicly available. Third parties can run, amend, copy, and distribute this SFBD-SWL and other SFBD Community Models under Creative Commons Attribution-Share Alike 4.0 International License to meet the need for timely and best science. Available for download is the model input

Model setup

Model grid for Delft3D Flexbile Mesh (hydrodynamic and water quality)


When using this schematization, please include one of following the references. Moreover, please review the Terms of Use.

  • Achete, F. M., Wegen, M., Roelvink, D., & Jaffe, B. (2015). A 2-D process-based model for suspended sediment dynamics: a first step towards ecological modeling. Hydrology and Earth System Sciences, 19(6), 2837-2857.

  • Achete, F. M., van der Wegen, M., Roelvink, D., & Jaffe, B. (2016). Suspended sediment dynamics in a tidal channel network under peak river flow. Ocean Dynamics, 66(5), 703-718.

  • Achete, F., Van Der Wegen, M., Roelvink, J. A., & Jaffe, B. (2017). How can climate change and engineered water conveyance affect sediment dynamics in the San Francisco Bay-Delta system?. Climatic Change, 142(3-4), 375-389.


Terms of Use

The data and models provided on this website are preliminary and are subject to revision. They are being provided to meet the need for timely best science. The data are provided on the condition that neither Deltares USA, the U.S. Geological Survey nor the U.S. Government may be held liable for any damages resulting from the authorized or unauthorized use of the data. This SFBD-3D model is developed by IHE Delft and is sponsored by U.S. Geological Survey Pacific Coastal & Marine under contract G11PX-2112. This model schematization is developed with professional care based on the conditions of the mentioned contract. The accuracy is subject to the contractual conditions and the usual assumptions and approximations made in mathematical modeling. You are entitled to run, amend, copy and distribute the San Francisco Bay-Delta Model under the conditions of the Creative Commons Attribution-ShareAlike 4.0 International License. © 2015, IHE Delft Institute for Water Education.

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