Abstract
Wave overtopping is one of main failure mechanism of flood protective structures. Experiments and numerical simulations have shown that transitions are weak spots for cover erosion. Transitions in geometry and in bed roughness affect the cover erosion significantly by local deceleration and acceleration of the flow. This paper presents a method to compute the critical average overtopping discharge for a complex dike geometry, including transition, applied to the Afsluitdijk case study. The results show that although the critical overtopping discharge decreases with increasing wave height, the sensitivity of the critical overtopping discharge for wave height decreases for higher waves. This is shown for both the COM and the VE-TM models for all locations along the dike’s cross section. Although further validation of both models is needed for a wider range of dike configurations, the results show that both models are able to probabilistically assess grass erosion based on the critical overtopping discharge for complex dike geometries, including transitions.
Original language | English |
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Number of pages | 6 |
DOIs | |
Publication status | Published - 2021 |
Event | 4th European Conference on Flood Risk Management, FLOODrisk 2020 - Budapest University of Technology and Economics (BME) ; Online event, Virtual Conference, Hungary Duration: 21 Jun 2021 → 25 Jun 2021 Conference number: 4 |
Conference
Conference | 4th European Conference on Flood Risk Management, FLOODrisk 2020 |
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Abbreviated title | FLOODrisk 2020 |
Country/Territory | Hungary |
City | Virtual Conference |
Period | 21/06/21 → 25/06/21 |