The Vulnerability of Damaged River and Lake Dikes for Wave Overtopping
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Abstract
Wave overtopping results in erosion of grass-covered flood defenses which can result in a dike breach. Damages to the dike cover decrease the cover strength and simultaneously increase the hydraulic load on the dike cover. Therefore, damages on the dike cover are vulnerable locations for wave overtopping failure. In this study, the failure probabilities of different types of damages are calculated and compared to the failure probability of a regular dike profile to determine the vulnerability of damages for wave overtopping. The method is applied to a river and lake dike where the model results show that the total failure probability is smaller on the crest and upper slope for the lake dike and higher on the lower slope and at the inner toe. The failure probability increases between a factor 4 and 14 for damaged location where the cover still contains grass vegetation. However, lake dikes are more vulnerable for damages compared to lake dikes in cases where only a bare clay cover is left. In that case, a dike with a damage is almost 3000 more likely to fail compared to a regular dike for a lake dike and around 120 times more likely to fail for a river dike- Title
- The Vulnerability of Damaged River and Lake Dikes for Wave Overtopping
- Author
- Bergeijk, Vera M. van
- Verdonk, Vincent A.
- Warmink, Jord J.
- Hulscher, Suzanne J. M. H.
- Date of issue
- 2021
- Access level
- Open access
- Copyright owner
- Full or partial reprint or use of the papers is encouraged, subject to due acknowledgement of the authors and its publication in these proceedings. The copyright of the research resides with the authors of the paper, with the FLOODrisk consortium.
- Conference title
- FLOODrisk 2020 - 4th European Conference on Flood Risk Management
- Conference place
- Online
- Conference date
- 2021.06.22-2021.06.24
- Language
- en
- Subject
- failure probability, wave overtopping, transitions
- Version
- Kiadói változat
- Identifiers
- DOI: 10.3311/FloodRisk2020.1.20
- Title of the container document
- Science and practice for an uncertain future
- Document type
- könyvfejezet
- Document genre
- Konferenciacikk