A hybrid solution for the Galveston Seawall
A study on the reduction of the hydraulic loads by a sand cover at the Galveston Seawall with the use of XBeach
J.R.M. Muller (TU Delft - Civil Engineering & Geosciences)
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Abstract
The City of Galveston is protected from extreme storm impact by a 17-km concrete seawall facing the Gulf of Mexico. Recent investigations have shown that the seawall may not be sufficient any more to protect against a 1 in 100 year design storm. Since raising the seawall disconnects the city from the beach and may be very costly, a hybrid approach is being discussed in which the existing hard structure is covered by a dune. This numerical model study investigates the hydro- and morphodynamic effects of adding a sand cover to the Galveston Seawall under extreme storm conditions.