Experimental investigation of overflowing over river groyne exposed to primary ship-induced waves

Groynes in the Lower Elbe estuary in Germany are subject to attack from overflowing long-period primary ship-induced waves. Damage can occur on the crest and lee side of the structure due to the high turbulent overflowing flow velocities. An actual design tool for groynes exposed to overflowing primary ship waves is not yet present. Therefore,...

The effect of modifications to a groyne area in the Nieuwe Waterweg: Project De Groene Poort

In the Nieuwe Waterweg an ongoing pilot takes place in one of the groyne areas. This pilot is a part of the “De Groene Poort” project. The idea for this project is to create intertidal areas by modifying and nourishing groyne areas. These artificially formed intertidal areas will create a new habitat for wildlife and attract different vegetation...

Characterization of Long-period Ship Wave Loading and Vessel Speed for Risk Assessment for Rock Groyne Designs via Extreme Value Analysis

During the last two decades, increasing vessel size in major German estuaries has led to the significant change of the local loading regime i.e. increased importance of ship-induced waves and currents. As a consequence, the intensity of ship-induced loads has increased considerably, resulting in damage to rock structures such as revetments,...

Groyne field nourishments: A research into the application of feeder nourishments to supply sediment to the main channel

In the Waal bed degradation occurs, which is mainly induced by a large number of river regulations measures done in the past. Rijkswaterstaat develops possible measures and new techniques to stop riverbed erosion and/or mitigate the negative effects. One of the possible new techniques to reduce riverbed erosion locally is groyne field...

Bank Erosion Processes in Regulated Navigable Rivers

Vessel-induced waves affect the morphology and ecology of banks and shorelines around the world. In rivers used as waterways, ship passages contribute to the erosion of unprotected banks, but their short- and long-term impacts remain unclear. This work investigates the effects of navigation on bank erosion along a reach of the regulated Meuse...

Surfing waves generated by a hull

In this paper a new wave pool concept is presented using ship hulls as wave generators. To evaluate the potential of such a concept a towing tank experiment is conducted to investigate ship wave generation in a confined space. In the towing tank experiment various hull sizes and velocities are examined to maximize the generated wave height. The...

Using Stereo Photo Measurements to Analyze the Surfability of Ship Induced Waves

The objective of this paper is to demonstrate the use of Stereo Photogrammetry (SP) measuring ship-generated waves and to determine under which conditions they are suitable for surfing. A physical experiment is conducted to gain insight in ship wave behavior under specific conditions. Waves are generated by a hull and are measured using SP. It...

Verder ontwikkelen van oeverafslagmodel BEM

Verkenning golfbelasting op kribben

Scheepsgeïnduceerde waterbeweging in kribvakken: Analyse prototypemetingen

Flood-control measures that utilize natural functions of rivers

Describes the process of bank erosion by currents and (ship) waves, investigations in prototype and model.

Vaarwegdwarsprofielen met bermen

The relation between the form of cross section the cross section, the method of revetment and the distribution of the water velocities in a waterway

Calculation method for water movement induced by ships in canals

Protection of embankments and bed in inland and maritime waters, and in overflows or weirs

L'etude du probieme de la protection des rives de cours d'eau, taite dans ce rapport, sera limitee au cas d 'un bateau naviguant dans un canal relativement ·etroit. Le risque que Ie fond et les talus du canal soient degrades, est determine par Je caract ere et l'intensite des mouvements qui naissent de la navigation et qui, a leur tour,...