Keywords
coastal engineering tools
longshore sediment transport
wave model
How to Cite
Abstract
Although the influence of both natural and human-induced changes on the evolution of worldwide deltas have been widely addressed, few studies have analyzed the variations of the submerged morphology due to river regulations by dams. In this work, we analyze the changes in the submerged morphology of a Mediterranean deltaic system after the regulation of its main fluvial inflow. We use high-resolution bathymetric measurements and globally used coastal engineering models and tools to characterize the cross-shore and alongshore variations of the nearshore bathymetry of the delta. The applicability and limitations of these tools are discussed, identifying their major weaknesses for their application in this type of environments.References
R. J. Bergillos, C. Delgado-Rodríguez, A. López-Ruiz, A. Millares, M. Ortega-Sánchez, and M. A. Losada. Recent human-induced coastal changes in the Guadalfeo river deltaic system (southern Spain). In Proceedings of the 36th IAHR-International Association for Hydro-Environment Engineering and Research World Congress, 2015.
R. J. Bergillos, A. López-Ruiz, M. Ortega-Sánchez, G. Masselink, and M. A. Losada. Implications of delta retreat on wave propagation and longshore sediment transport - Guadalfeo case study (southern Spain). Marine Geology, 382:1-16, 2016a.
R. J. Bergillos, M. Ortega-Sánchez, G. Masselink, and M. A. Losada. Morpho-sedimentary dynamics of a micro-tidal mixed sand and gravel beach, Playa Granada, southern Spain. Marine Geology, 379:28-38, 2016b.
R. J. Bergillos, C. Rodríguez, A. Millares, M. Ortega-Sánchez, and M. A. Losada. Impact of river regu- lation on a Mediterranean delta: assessment of managed versus unmanaged scenarios. Water Resources Research, 52:5132-5148, 2016c. doi: 10.1002/2015WR018395.
N. Booij, R. C. Ris, and L. H. Holthuijsen. A third-generation wave model for coastal regions: 1. Model description and validation. Journal of Geophysical Research: Oceans, 104(C4):7649-7666, 1999.
J. M. Coleman and L. Wright. Modern river deltas: variability of processes and sand bodies. Houston Geological Society, 1975.
S. Dan, W. Djr, M. J. Stive, and N. Panin. Processes controlling the development of a river mouth spit. Marine Geology, 280(1):116-129, 2011.
R. G. Dean and R. A. Dalrymple. Coastal processes with engineering applications. Cambridge University Press, 2002.
M. M. El Banna and O. E. Frihy. Human-induced changes in the geomorphology of the northeastern coast of the Nile delta, Egypt. Geomorphology, 107(1):72-78, 2009.
L. Gorrell, B. Raubenheimer, S. Elgar, and R. T. Guza. SWAN predictions of waves observed in shallow water onshore of complex bathymetry. Coastal Engineering, 58:510-516, 2011.
L. H. Holthuijsen, N. Booij, and R. C. Ris. A spectral wave model for the coastal zone. In Ocean Wave Measurement and Analysis (pp. 630-641). ASCE, 1993.
A. Jabaloy-Sánchez, F. Lobo, P. Bárcenas, A. Azor, L. M. Fernandez-Salas, V. Díaz del Río, and J. V. Pérez-Peña. Human-Driven Coastline Changes in the Adra River Deltaic System, Southeast Spain. Ge- omorphology, 119(1-2):9-22, 2010.
A. Jabaloy-Sánchez, F. Lobo, A. Azor, W. Martin-Rosales, J. V. Pérez-Peña, P. Bárcenas, J. Macias, L. M. Fernández-Salas, and M. Vázquez-Vilchez. Six thousand years of coastline evolution in the Guadalfeo deltaic system (southern Iberian Peninsula). Geomorphology, 206:374-391, 2014.
J. A. Jimenez and A. Sánchez-Arcilla. Medium-term coastal response at the Ebro delta, Spain. Marine Geology, 114:105-118, 1993.
J. W. Kamphuis. Alongshore sediment transport rate. Journal of Waterway, Port, Coastal, and Ocean Engineering, 117(6):624, 1991.
G. R. Lesser. An approach to medium-term coastal morphological modelling. UNESCO-IHE, Institute for Water Education, 2009.
G. R. Lesser, J. A. Roelvink, V. K. Jatm, and G. S. Stelling. Development and validation of a three- dimensional morphological model. Coastal engineering, 51(8):883-915, 2004.
A. López-Ruiz, M. Ortega-Sánchez, A. Baquerizo, and M. A. Losada. Short and medium- term evolution of shoreline undulations on curvilinear coasts. Geomorphology, 159:189-200, 2012a.
A. López-Ruiz, M. Ortega-Sánchez, A. Baquerizo, D. Navidad, and M. A. Losada. Nonuniform alongshore sediment transport induced by coastline curvature. 33th Coastal Engineering Conference, Electronic edi- tion. In Texas Digital Library, pages 3046-3052, 2012b.
A. López-Ruiz, M. Ortega-Sánchez, A. Baquerizo, and M. A. Losada. A note on along- shore sediment transport on weakly curvilinear coasts and its implications. Coastal Engineering, 88:143-153, 2014.
M. A. Losada, A. Baquerizo, M. Ortega-Sánchez, and A. Avila. Coastal evolution, sea level and assessment of intrinsic uncertainty. Journal of Coastal Research, SI59:218-228, 2011.
R. Magne, K. A. Belibassakis, T. H. Herbers, F. Ardhuin, W. C. O'Reilly, and V. Rey. Evolution of surface gravity waves over a submarine canyon. Journal of Geophysical Research - Oceans, 112:C01002, 2007. doi: 10.1029/2005JC003035.
P. McLaren and D. Bowles. The effects of sediment transport on grain-size distributions. Journal of Sedimentary Petrology, 55:457-470, 1985.
A. Millares, M. J. Polo, A. Moñino, J. Herrero, and M. A. Losada. Reservoir sedimentation and erosion processes in a snow-influenced basin in Southern Spain. In Reservoir Sedimentation, pages 91-98. CRC Press, 2014.
M. Ortega-Sánchez, S. Bramato, E. Quevedo, C. Mans, and M. A. Losada. Atmospheric-hydrodynamic coupling in the nearshore. Geophysical Research Letters, 35:L23601, 2008.
M. Ortega-Sánchez, R. Bergillos, A. López-Ruiz, and M. Losada. Morphodynamics of Mediterranean mixed sand and gravel coasts. Springer, 2017.
G. Orton and H. Reading. Variability of deltaic processes in terms of sediment supply, with particular emphasis on grain size. Sedimentology, 40(3):475-512, 1993.
D. Reeve, A. Chadwick, and C. Fleming. Coastal Engineering: processes, theory and design practice (Second edition). Spon Press, 2012.
F. Sabatier, G. Maillet, M. Provansal, T.-J. Fleury, S. Suanez, and C. Vella. Sediment budget of the rhône delta shoreface since the middle of the 19th century. Marine Geology, 234(1):143-157, 2006.
F. Sabatier, O. Samat, A. Ullmann, and S. Suanez. Connecting large-scale coastal behaviour with coastal management of the Rhone delta. Geomorphology, 107(1):79-89, 2009.
U. Simeoni and C. Corbau. A review of the Delta Po evolution (Italy) related to climatic changes and human impacts. Geomorphology, 107(1):64-71, 2009.
J. P. Syvitski, A. J. Kettner, I. Overeem, E. W. Hutton, M. T. Hannon, G. R. Brakenridge, J. Day, C. Voros- marty, Y. Saito, L. Giosan, et al. Sinking deltas due to human activities. Nature Geoscience, 2(10): 681-686, 2009.
U.S.A.C.E. Shore Protection Manual. U.S. Government Printing Office, Washington, D.C., 1984.