Resumen
A consolidated cohesive sediment layer exists below a layer of sand on some beaches along the Great Lakes (glacial till) and the Gulf of Mexico. The erosion process of consolidated cohesive sediment may be gradual but irreversible (no recovery) apart from sand and gravel released from the eroded consolidated cohesive sediment. The cohesive sediment erosion rate is increased by a thin mobile layer of sand and decreased by a thick sand layer. The complicated interactions of waves, sand and cohesive bottom are simplified and incorporated into an existing cross-shore numerical model.Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/ka3wl3DA1l4
Referencias
Bishop, C.T., and Skafel, M.G. 1992. “Detailed description of laboratory tests on the erosion by waves of till profiles.” NWRI Contribution No. 92-26. Burlington, Canada: National Water Research Institute.
Bishop, C.T., Skafel, M.G., and Nairn, R. 1992. “Cohesive profile erosion by waves.” Proc., 23rd Coastal Engineering Conf., 2976-2989. Reston, VA: ASCE.
Kamphuis, J.W. 1990. “Influence of sand or gravel on the erosion of cohesive sediment.” J. Hydraulic Res., 28(1), 43-53.
Kobayashi, N. 2016. “Coastal sediment transport modeling for engineering applications.” J. Waterway, Port, Coastal, Ocean Eng., 142 (6): 03116001.
Kobayashi, N., and Weitzner, H. 2015. “Erosion of a seaward dike slope by wave action.” J. Waterway, Port, Coastal, Ocean Eng., 141 (2): 04014034.
Kobayashi, N., and Zhu, T. 2020. “Erosion by Wave Action of Consolidate Cohesive Bottom Containing Cohesionless Sediment.” J. Waterway, Port, Coastal, Ocean Eng., 146 (2), 04019041.
Skafel, M.G. 1995. “Laboratory measurement of nearshore velocities and erosion of cohesive sediment (till) shorelines.” Coastal Eng., 24 (3-4): 343-349.
Skafel, M.G., and Bishop, C.T. 1994. “Flume experiments on the erosion of till shore by waves.” Coastal Eng., 23 (3-4), 329-348.
USACE (US Army Corps of Engineers). 2003. Coastal engineering manual. Washington, DC: USACE.
Zhu, T., and Kobayashi, N. 2019. “Erosion of consolidated cohesive bottom containing cohesionless sediment by wave action on beach.” Research Rep. No. CACR-19-01, Center for Applied Coastal Research, Univ. of Delaware, Newark, DE