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Simulation of cumulative effects of nearshore restoration projects on estuarine hydrodynamics

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  • Yang, Zhaoqing
  • Khangaonkar, Tarang
  • Calvi, Maria
  • Nelson, Kurt

Abstract

Many nearshore restoration projects are currently underway at coastal locations where human influence and development have disrupted natural habitat and coastal ecological systems. The objectives of these projects in general are to restore the lost estuarine functions to the tidal marshland. Often these projects are conducted with little understanding of the potential effects of other nearby projects within the ecosystem, and similarly, it is easy to neglect the effect of the local project on the larger estuarine scale. In this paper, a modeling study is presented to evaluate the hydrodynamic responses of multiple restoration projects and their cumulative effect in the Snohomish River estuary in Washington, USA. The concept of absolute mean tidal transport is introduced and used to measure the cumulative effect of the proposed restoration projects on the estuarine hydrodynamics. The results show that the hydrodynamic responses due to multiple restoration projects are additive in the estuary, and the effect is nonlinear. The hydrodynamic response under restoration conditions depends on the size of the restoration area and the geometric configuration of the existing river channels. Within a complex braided estuary such as the Snohomish, the influence of a specific restoration project is not only experienced locally, but also found to significantly affect tidal transport in all distributary branches within the system.

Suggested Citation

  • Yang, Zhaoqing & Khangaonkar, Tarang & Calvi, Maria & Nelson, Kurt, 2010. "Simulation of cumulative effects of nearshore restoration projects on estuarine hydrodynamics," Ecological Modelling, Elsevier, vol. 221(7), pages 969-977.
    • Handle: RePEc:eee:ecomod:v:221:y:2010:i:7:p:969-977
    DOI: 10.1016/j.ecolmodel.2008.12.006
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    References listed on IDEAS

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    1. Buzzelli, Christopher, 2008. "Development and application of tidal creek ecosystem models," Ecological Modelling, Elsevier, vol. 210(1), pages 127-143.
    2. Dedecker, Andy P. & Van Melckebeke, Koen & Goethals, Peter L.M. & De Pauw, Niels, 2007. "Development of migration models for macroinvertebrates in the Zwalm river basin (Flanders, Belgium) as tools for restoration management," Ecological Modelling, Elsevier, vol. 203(1), pages 72-86.
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    Cited by:

    1. Nogueira Terra, Talita & Ferreira dos Santos, Rozely, 2012. "Measuring cumulative effects in a fragmented landscape," Ecological Modelling, Elsevier, vol. 228(C), pages 89-95.

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