More Like this

1. Subgrid theory for storm surge modeling

   https://doi.org/10.1016/j.ocemod.2019.101491  

   Kennedy, Andrew B.; Wirasaet, Damrongsak; Begmohammadi, Amirhosein; Sherman, Thomas; Bolster, Diogo; Dietrich, J.C. (December 2019, Ocean Modelling)
2. Subgrid surface connectivity for storm surge modeling

   https://doi.org/10.1016/j.advwatres.2021.103939  

   Begmohammadi, Amirhosein; Wirasaet, Damrongsak; Silver, Zachariah; Bolster, Diogo; Kennedy, Andrew B.; Dietrich, J.C. (July 2021, Advances in Water Resources)

   null (Ed.)
3. The Importance of Storm Surge for Sediment Delivery to Microtidal Marshes

   https://doi.org/10.1029/2022JF006612  

   Zhu, Qingguang; Wiberg, Patricia L. (September 2022, Journal of Geophysical Research: Earth Surface)

   Abstract Storm surge has the potential to significantly increase suspended sediment flux to microtidal marshes. However, the overall effects of storm surge on microtidal marsh deposition have not been well quantified, with most modeling studies focusing on regular (astronomical) tidal flooding. Here we applied the Delft3D model to a microtidal bay‐marsh complex in Hog Bay, Virginia to quantify the contributions of storm surge to marsh deposition. We validated the model using spatially distributed hydrodynamic and suspended sediment data collected from the site and ran model simulations under different storm surge conditions with/without storm‐driven water level changes. Our results show that episodic storm surge events occurred 5% of the time at our study site, but contributed 40% of marsh deposition during 2009–2020. Our simulations illustrate that while wind‐driven waves control sediment resuspension on tidal flats, marsh deposition during storms was largely determined by tidal inundation associated with storm‐driven water levels. A moderate storm surge event can double sediment flux to most marshes around the bay and deliver more sediment to the marsh interior compared to simulations that include wind waves but not storm surge variations in water levels. Simulations of bay and marsh response to different storm surge events with varying magnitude of storm surge intensity reveal that total marsh deposition around the bay increased linearly with storm surge intensity, suggesting that future changes to storm magnitude and/or frequency would have significant implications for sediment supply to marshes at our study site. 

   more » « less
4. Integrating Climatological‐Hydrodynamic Modeling and Paleohurricane Records to Assess Storm Surge Risk

   https://doi.org/10.1029/2023JC020354  

   Begmohammadi, Amirhosein; Blackshaw, Christine Y.; Lin, Ning; Gori, Avantika; Wallace, Elizabeth; Emanuel, Kerry; Donnelly, Jeffrey P. (January 2024, Journal of Geophysical Research: Oceans)

   Sediment cores from blue holes have emerged as a promising tool for extending the record of long‐term tropical cyclone (TC) activity. However, interpreting this archive is challenging because storm surge depends on many parameters including TC intensity, track, and size. In this study, we use climatological‐hydrodynamic modeling to interpret paleohurricane sediment records between 1851 and 2016 and assess the storm surge risk for Long Island in The Bahamas. As the historical TC data from 1988 to 2016 is too limited to estimate the surge risk for this area, we use historical event attribution in paleorecords paired with synthetic storm modeling to estimate TC parameters that are often lacking in earlier historical records (i.e., the radius of maximum wind for storms before 1988). We then reconstruct storm surges at the sediment site for a longer time period of 1851–2016 (the extent of hurricane Best Track records). The reconstructed surges are used to verify and bias‐correct the climatological‐hydrodynamic modeling results. The analysis reveals a significant risk for Long Island in The Bahamas, with an estimated 500‐year stormtide of around 1.63 ± 0.26 m, slightly exceeding the largest recorded level at site between 1988 and 2015. Finally, we apply the bias‐corrected climatological‐hydrodynamic modeling to quantify the surge risk under two carbon emission scenarios. Due to sea level rise and TC climatology change, the 500‐year stormtide would become 2.69 ± 0.50 and 3.29 ± 0.82 m for SSP2‐4.5 and SSP5‐8.5, respectively by the end of the 21st century. 

   more » « less
5. Numerical extensions to incorporate subgrid corrections in an established storm surge model

   https://doi.org/10.1080/21664250.2022.2159290  

   Begmohammadi, Amirhosein; Wirasaet, Damrongsak; Poisson, Autumn; Woodruff, Johnathan L.; Dietrich, J. Casey; Bolster, Diogo; Kennedy, Andrew B. (December 2022, Coastal Engineering Journal)