Evaluation of building damage during the July 2021 flash-flood in the Ahr Valley (Germany)

Classification of bore patterns induced by storm waves overtopping a dike crest and their impact types on dike mounted vertical walls – A large-scale model study

Short duration bores in the coastal zone are generated by wave breaking in shallow water and mild foreshore conditions. In storm weather situations and for sea level rise scenarios, these bores approach the dike and interact with previously overtopped or reflected bores. Combined laser scanner and video measurements were used to study the...

Walowa (Wave Loads on Walls): Large-Scale Experiments in the Delta Flume

Overtopping wave loads on vertical structures on top of a dike have been investigated in several small scale experiments in the past. A large-scale validation for a mild foreshore situation is still missing. Hence the WALOWA experimental campaign was carried out to address this topic. In the present paper the objectives of the WALOWA project are...

Influence of wind and current on wave-run up and wave overtopping

The investigations of FlowDike 1 and FlowDike 2 on the effects of onshore wind and longshore current on wave run-up and wave overtopping for perpendicular and oblique wave attack. These variables were two of the missing effects in freeboard design and therefore a main interest for design purposes. Model tests were carried out in the shallow...

Flow depths and velocities at crest and landward slope of a dike, in theory and with the wave overtopping simulator

Wave overtopping discharges at coastal structures are well described in the EurOtop Manual (2007), including the distribution of overtopping wave volumes. Each volume that overtops a dike or levee will have a certain flow velocity and depth record in time, often given by the maximum velocity and flow depth. This paper describes some further...

Experimentelle Untersuchungen zur Stabilität von verzahnten Setzsteindeckwerken

Revetments protect the shorelines of coasts, estuaries and rivers against wind wave, ship wave, current and ice attack. The resistance of revetments essentially depends on the properties of the cover layer. The resistance of interlocked pattern placed revetments depends on the weight of the individual stones and the interlocking. Extensive large...

Wissenschaftliche Untersuchung der Stabilität von Verkalit-Deckwerksteinen

Während des Versuchszeitraums wurden vier verschiedene Modellphasen durchgeführt. Die Modellphasen 1 bis 3 variiteren nur bezüglich der zum Einsatz kommenden Verkalit-Deckwerksteine. Der unterliegende Deckwerksaufbau hingegen stellte mit der Schichtenabfolge Sand, Kornfilter, Geotextil einen nach den Regeln der Technik anerkannten...

Individual overtopping events at dikes

Recently, formulae have been derived for maximum flow depths and velocities on the crest and inner slope of dikes or levees at wave overtopping. Two independent physical model test programs in different wave flumes showed, however, a large difference in the results. The present paper clarifies this discrepancy and shows that the empirical...

EurOtop, European Overtopping Manual - Wave overtopping of sea defences and related structures: Assessment manual

The manual has been intended to assist engineers who are already aware of the general principles and methods of coastal engineering. The manual uses methods and data from research studies around Europe and overseas so readers are expected to be familiar with wave and response parameters and the use of empirical equations for prediction. Users...

Wellenüberlaufströmung bei Seedeichen - Experimentelle und theoretische Untersuchungen

Wave overtopping is one of the most important processes for the design of seadikes which was responsible for many severe dike failures in the past. Wave overtopping can not be avoided due to the random nature of the waves and the uncertainties associated with the determination of the design water level. The present design on wave overtopping is...