Update of the Eurotop Manual: New Insights on Wave Overtopping

Abstract

Quite some new insights on wave overtopping were achieved since the first submission of the EurOtop Manual in 2007, which have now resulted in a second edition of this Manual. A major improvement has been made on the understanding of wave by wave overtopping and tolerable wave overtopping that is connected to it. Many videos are available on the overtopping website that show all kind of overtopping discharges and volumes and may give guidance for the user of the Manual. The EurOtop Neural Network and the EurOtop database are improved and extended versions of the earlier NN and CLASH database. New insights and prediction formulae have been developed for very low freeboards; for very steep slopes up to vertical walls; for run-up on steep slopes; for overtopping on storm walls on a promenade; and for overtopping on vertical walls, where overtopping has been divided in situations with and without an influencing foreshore and where the first situation may be divided in non-impulsive and impulsive overtopping.

Multihazard simulation for coastal flood mapping: Bathtub versus numerical modelling in an open estuary, Eastern Canada

“…For instance, two‐dimensional (2D) numerical coastal and overland flow models determine the landward extent of the instantaneous water/bed junction, varying water depth and flow velocity (Perini, Calabrese, Salerno, Ciavola, & Armaroli, ). Overland flow models are generally applied separately to coastal models, using a combination of empirical overtopping/wave runup equations (e.g., EurOtop, Van der Meer et al, ) or hydro‐morphodynamic numerical outputs as primary upstream discharge for inland shallow water propagation (Barnard et al, ; Christie et al, ; Gallien, ; Wadey, Nicholls, & Haigh, ). Alternatively, using the full hydrodynamic and flow propagation capabilities of XBeach (Elsayed & Oumeraci, ) are a promising avenue in coastal flood mapping.…”

Global changes of extreme coastal wave energy fluxes triggered by intensified teleconnection patterns

“…Extreme waves transfer large amounts of energy to the coast, applying huge stress to coastal installations and protection structures [Oumeraci, 1994;Van der Meer et al, 2016], accelerating sediment transport processes and coastal erosion [Masselink and Puleo, 2006;Vousdoukas et al, 2012b;Archetti et al, 2016;Masselink et al, 2016;Monioudi, 2016;Postacchini et al, 2017], and driving dune breaching [Matias et al, 2008;Roelvink et al, 2009] and inundation [Bertin et al, 2012;Vousdoukas et al, 2016b]. By modulating interactions between oceans and the atmosphere waves play an important role in the climate system [Hemer et al, 2012] and are likely to be affected by global warming.…”

Evaluation of flood risk reduction strategies through combinations of interventions

“…Surge flow to the next layer is calculated using simple hydraulic relations. In this model, there are three forms of flow: Overtopping/Overflow, Broad Weir and Open channel flow, calculated with formulas from EurOtop (), Brunner (), and Stoeten (), respectively. Table shows which situations are possible and how they are considered.…”