Episodic transport of organic-rich sediments in a microtidal estuarine system

F. G. Marván, S. G. Wallis, A. J. Mehta

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    Episodic transport of organic-rich sediment was examined in the Ortega/Cedar estuary system in Florida using a newly developed 2D horizontal model for fine cohesive sediment transport. Bed sediment samples were analyzed to provide information on organic content, settling velocity, erodibility and consolidation for inclusion in the model. Only a rudimentary calibration of the model was possible due to lack of data. Nevertheless the model reproduced the main tidal and sediment transport features of the estuary system, including the predominantly depositional nature of the system. In a more sophisticated version of the model, sediment erosion and deposition were manipulated by implementing organic content dependent functions, derived from the analysis of data from several sites. This allowed the model to be used to investigate the sensitivity of the sediment transport to the organic content. The changes in deposition rates caused by varying the organic content were found to be significant during large river discharge events, but during normal discharges they were insignificant. At approximately 40% organic content, there is a tendency for sediment accumulation rates to decrease and, in places, erosion becomes the dominant sediment transport process. © 2002 Elsevier B.V. All rights reserved.

    Original languageEnglish
    Title of host publicationProceedings in Marine Science
    Subtitle of host publicationFine Sediment Dynamics in the Marine Environment
    EditorsJohan C. Winterwerp, Cees Kranenburg
    Pages611-626
    Number of pages16
    Volume5
    DOIs
    Publication statusPublished - 2002
    EventProceedings of the INTERCOH 2000 - Delft, Netherlands
    Duration: 4 Sep 20008 Sep 2000

    Publication series

    NameProceedings in Marine Science
    Volume5
    ISSN (Print)1568-2692

    Conference

    ConferenceProceedings of the INTERCOH 2000
    Abbreviated titleINTERCOH 2000
    CountryNetherlands
    CityDelft
    Period4/09/008/09/00
    Otherpublished in Fire Sediment Dynamics in the Marine Environment, by Elservier

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  • Cite this

    Marván, F. G., Wallis, S. G., & Mehta, A. J. (2002). Episodic transport of organic-rich sediments in a microtidal estuarine system. In J. C. Winterwerp, & C. Kranenburg (Eds.), Proceedings in Marine Science: Fine Sediment Dynamics in the Marine Environment (Vol. 5, pp. 611-626). (Proceedings in Marine Science; Vol. 5). https://doi.org/10.1016/S1568-2692(02)80043-2