Articles | Volume 25, issue 2
https://doi.org/10.5194/hess-25-769-2021
https://doi.org/10.5194/hess-25-769-2021
Research article
 | 
18 Feb 2021
Research article |  | 18 Feb 2021

Accretion, retreat and transgression of coastal wetlands experiencing sea-level rise

Angelo Breda, Patricia M. Saco, Steven G. Sandi, Neil Saintilan, Gerardo Riccardi, and José F. Rodríguez

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Cited articles

Alizad, K., Hagen, S. C., Morris, J. T., Bacopoulos, P., Bilskie, M. V., Weishampel, J. F., and Medeiros, S. C.: A coupled, two-dimensional hydrodynamic-marsh model with biological feedback, Ecol. Model., 327, 29–43, https://doi.org/10.1016/j.ecolmodel.2016.01.013, 2016a. 
Alizad, K., Hagen, S. C., Morris, J. T., Medeiros, S. C., Bilskie, M. V., and Weishampel, J. F.: Coastal wetland response to sea-level rise in a fluvial estuarine system, Earths Future, 4, 483–497, https://doi.org/10.1002/2016ef000385, 2016b. 
Bellafiore, D., Ghezzo, M., Tagliapietra, D., and Umgiesser, G.: Climate change and artificial barrier effects on the Venice Lagoon: Inundation dynamics of salt marshes and implications for halophytes distribution, Ocean Coast. Manage., 100, 101–115, https://doi.org/10.1016/j.ocecoaman.2014.08.002, 2014. 
Belliard, J. P., Di Marco, N., Carniello, L., and Toffolon, M.: Sediment and vegetation spatial dynamics facing sea-level rise in microtidal salt marshes: Insights from an ecogeomorphic model, Adv. Water Resour., 93, 249–264, https://doi.org/10.1016/j.advwatres.2015.11.020, 2016. 
Beudin, A., Kalra, T. S., Ganju, N. K., and Warner, J. C.: Development of a coupled wave-flow-vegetation interaction model, Comput. Geosci., 100, 76–86, https://doi.org/10.1016/j.cageo.2016.12.010, 2017. 
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Short summary
We study accretion, retreat and transgression of mangrove and saltmarsh wetlands affected by sea-level rise (SLR) using simulations on typical configurations with different levels of tidal obstruction. Interactions and feedbacks between flow, sediment deposition, vegetation migration and soil accretion result in wetlands not surviving the predicted high-emission scenario SLR, despite dramatic increases in sediment supply. Previous simplified models overpredict wetland resilience to SLR.