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| Titel |
A 2-D process-based model for suspended sediment dynamics: a first step towards ecological modeling |
| VerfasserIn |
F. M. Achete, M. Wegen, D. Roelvink, B. Jaffe |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 19, no. 6 ; Nr. 19, no. 6 (2015-06-19), S.2837-2857 |
| Datensatznummer |
250120746
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| Publikation (Nr.) |
 copernicus.org/hess-19-2837-2015.pdf |
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| Zusammenfassung |
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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