Articles | Volume 26, issue 23
https://doi.org/10.5194/hess-26-5987-2022
https://doi.org/10.5194/hess-26-5987-2022
Research article
 | 
02 Dec 2022
Research article |  | 02 Dec 2022

Coastal topography and hydrogeology control critical groundwater gradients and potential beach surface instability during storm surges

Anner Paldor, Nina Stark, Matthew Florence, Britt Raubenheimer, Steve Elgar, Rachel Housego, Ryan S. Frederiks, and Holly A. Michael

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Cited articles

Abdollahi, A. and Mason, H. B.: Pore Water Pressure Response during Tsunami Loading, J. Geotech. Geoenviron., https://doi.org/10.1061/(asce)gt.1943-5606.0002205, 2020. 
Ataie-Ashtiani, B., Werner, A. D., Simmons, C. T., Morgan, L. K., and Lu, C.: How important is the impact of land-surface inundation on seawater intrusion caused by sea-level rise?, Hydrol. J., 21, 1673–1677, https://doi.org/10.1007/s10040-013-1021-0, 2013. 
Bratton, J. F.: The Three Scales of Submarine Groundwater Flow and Discharge across Passive Continental Margins, J. Geol., 118, 565–575, https://doi.org/10.1086/655114, 2010. 
Briaud, J.-L.: Geotechnical engineering: unsaturated and saturated soils. John Wiley and Sons, https://books.google.com/books?hl=en&lr=&id=6TMWDQAAQBAJ&oi=fnd&pg=PR21&dq=Geotechnical+engineering:+unsaturated+and+saturated+soils&ots=M1GNcgTZMw&sig=sw0t2K345ohBajzbl1ZVSDXGUgA#v=onepage&q=Geotechnical engineering: unsaturated and saturated soils&f=false (last access: 27 November 2022), 2013. 
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Short summary
Ocean surges can impact the stability of beaches by changing the hydraulic regime. These surge-induced changes in the hydraulic regime have important implications for coastal engineering and for beach morphology. This work uses 3D computer simulations to study how these alterations vary in space and time. We find that certain areas along and across the beach are potentially more vulnerable than others and that previous assumptions regarding the most dangerous places may need to be revised.