Flow separation effects on shoreline sediment transport
MetadataShow full item record
Field-tested numerical model simulations are used to estimate the effects of an inlet, ebb shoal, wave height, wave direction, and shoreline geometry on the variability of bathymetric change on a curved coast with a migrating inlet and strong nearshore currents. The model uses bathymetry measured along the southern shoreline of Martha’s Vineyard, MA, and was validated with waves and currents observed from the shoreline to ~10-m water depth. Between 2007 and 2014, the inlet was open and the shoreline along the southeast corner of the island eroded ~200 m and became sharper. Between 2014 and 2015, the corner accreted and became smoother as the inlet closed. Numerical simulations indicate that variability of sediment transport near the corner shoreline depends more strongly on its radius of curvature (a proxy for the separation of tidal flows from the coast) than on the presence of the inlet, the ebb shoal, or wave height and direction. As the radius of curvature decreases (as the corner sharpens), tidal asymmetry of nearshore currents is enhanced, leading to more sediment transport near the shoreline over several tidal cycles. The results suggest that feedbacks between shoreline geometry and inner-shelf flows can be important to coastal erosion and accretion in the vicinity of an inlet.
Author Posting. © The Author(s), 2017. This is the author's version of the work. It is posted here under a nonexclusive, irrevocable, paid-up, worldwide license granted to WHOI. It is made available for personal use, not for redistribution. The definitive version was published in Coastal Engineering 125 (2017): 23–27, doi:10.1016/j.coastaleng.2017.04.007.
Suggested CitationPreprint: Hopkins, Julia, Elgar, Steve, Raubenheimer, Britt, "Flow separation effects on shoreline sediment transport", 2017-01, https://doi.org/10.1016/j.coastaleng.2017.04.007, https://hdl.handle.net/1912/9075
Showing items related by title, author, creator and subject.
Separating the influence of temperature, drought, and fire on interannual variability in atmospheric CO2 Keppel-Aleks, Gretchen; Wolf, Aaron S.; Mu, Mingquan; Doney, Scott C.; Morton, Douglas C.; Kasibhatla, Prasad S.; Miller, John B.; Dlugokencky, Edward J.; Randerson, James T. (John Wiley & Sons, 2014-11-19)The response of the carbon cycle in prognostic Earth system models (ESMs) contributes significant uncertainty to projections of global climate change. Quantifying contributions of known drivers of interannual variability ...
Langdon, Erin M.; Qiu, Yupeng; Ghanbari Niaki, Amirhossein; McLaughlin, Grace A.; Weidmann, Chase; Gerbich, Therese M.; Smith, Jean A.; Crutchley, John M.; Termini, Christina M.; Weeks, Kevin M.; Myong, Sua; Gladfelter, Amy S. (2018-04)RNA promotes liquid-liquid phase separation (LLPS) to build membrane-less compartments in cells. How distinct molecular compositions are established and maintained in these liquid compartments is unknown. Here we report ...
Evidence for isolated evolution of deep-sea ciliate communities through geological separation and environmental selection Stock, Alexandra; Edgcomb, Virginia P.; Orsi, William D.; Filker, Sabine; Breiner, Hans-Werner; Yakimov, Michail M.; Stoeck, Thorsten (BioMed Central, 2013-07-08)Deep hypersaline anoxic basins (DHABs) are isolated habitats at the bottom of the eastern Mediterranean Sea, which originate from the ancient dissolution of Messinian evaporites. The different basins have recruited their ...