Weiqiu Chen

Weiqiu Chen
University of Twente | UT · Department of Water Engineering and Management

PhD

About

10
Publications
2,137
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61
Citations
Introduction
Investigate influence of berms, roughness and oblique waves on reducing wave overtopping at dikes.

Publications

Publications (10)
Article
Full-text available
Wave overtopping can cause erosion on the landward slope due to high flow velocities and turbulence that cause high stresses on the cover. Innovative block revetments such as Grassblocks protect the subsoil of the dike against erosion. The blocks are permeable, which reduces the flow velocity and the pressures along the landward slope. The performa...
Article
Full-text available
The mean overtopping discharge and the overtopping flow parameters related to individual overtopping events are often used to characterize the wave overtopping processes at dikes. Roughness, berms and oblique waves have significant effects on the wave overtopping processes at dikes while these effects are still not fully understood. A 2DV OpenFOAM®...
Article
Full-text available
Accurate calculation of wave overtopping is important for determining the required crest height and geometry of a dike. Berms and roughness elements are widely used to reduce the average overtopping discharge at dikes while the reductive effects of berm and roughness are still not fully understood. Several empirical formulae are available to predic...
Article
Full-text available
The average overtopping discharge is an important parameter for the design of flood defences. Several empirical formulas are available for predicting the overtopping discharge at dikes. However, these empirical formulas often have their specific applicable conditions. To complement with the empirical methods, a numerical model has been developed us...
Research
Full-text available
Average overtopping discharge is a crucial parameter for design and reinforcement of dikes. Rock armours and berms are widely used to reduce wave overtopping discharge by introducing slope roughness and energy dissipation. Since-methods for estimating the influence of a rock berm and roughness of rock armour at dikes on the average overtopping disc...
Article
Full-text available
The average overtopping discharge is an important parameter for the design and reinforcement of dikes. Rock armour on the waterside slopes and berms of dikes is widely used to reduce the wave overtopping discharge by introducing slope roughness and dissipation of energy in the permeable armour layer. However, methods for estimating the influence of...
Article
A reliable estimation of average wave overtopping discharge is important for dike design and safety assessment. Berms and roughness elements are widely applied to reduce the overtopping discharge over dikes. In this study, the effects of a berm and roughness on the wave overtopping discharge are investigated by means of physical model tests. New em...
Conference Paper
Full-text available
The probability of overtopping over the crest of dikes increases significantly during extreme events. Wave overtopping over dikes can initiate breaching of the dike. Hence, a reliable estimation of the overtopping discharge is important for the dike design and safety assessment. Berms and roughness elements are widely used around the world to reduc...
Article
Full-text available
Transitions in the dike revetment or in the grass cover can significantly affect the wave overtopping discharge and the dike cover erosion. At the University of Twente, two PhD students recently started on the challenge of quantifying the effect of (1) waterside transition on the wave overtopping discharge and (2) transitions in grass covered dikes...
Conference Paper
Full-text available
Failure of dike covers due to wave overtopping erosion may initiate dike breach. Surface transitions in the dike cover, such as cure points, height difference, roughness difference and objects are often weak spots, but the effects of such transitions on the wave overtopping discharge and associated location and evolution of dike cover erosion are h...

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Projects

Project (1)
Project
The goal of this research is to develop accurate methods for estimating the influence factors of berms, roughness and oblique waves on wave overtopping at dikes. New empirical equations for influence factors are developed based physical model tests. A 2DV OpenFOAM model is also set up to simulate wave overtopping at dikes, which can be applied combining with empirical equations to predict wave overtopping discharge and flow characteristics for a wide range of wave conditions and coastal structures.