DEVELOPMENT OF WAVE OVERTOPPING MODEL INCORPORATING WATER OVERFLOW FOR VERTICAL WALLS

  • Yoji Tanaka
  • Katsuyuki Suzuyama
  • Naoto Higuchi
  • Hidenori Shibaki

Abstract

In a situation where water overflow occurs on the seawalls due to a storm surge, generally it is high waves that cause wave overtopping. However, it is common that overflow and overtopping are modeled as separate phenomena, in a situation where both phenomena occur at the same time, the amount of water exceeding the seawalls may not be evaluated correctly. The purpose of this research is to develop a new wave overtopping model including the water overflow for vertical seawalls. The new overtopping model improved the overtopping model of Goda (Goda, 2008: Goda08 model). Goda08 model was developed to adapt for various seawall forms. Goda (2008) insisted it was more accurate than EurOtop model. Nonetheless, Goda08 model has a problem of overestimation in shallow area. Therefore, we tuned the parameters again. It is difficult to reproduce the situation where the overtopping and overflow occur at the same time in a hydraulic experiment. Consequently, CADMAS-SURF which is based on the 2-dimensional non-compressive fluid using the VOF method was used as an experimental data provider for comparative verification of the model.

References

EA (NK), ENW (NL), KFKI (DE), EurOtop Wave Overtopping of Sea Defences and Related Structures: Assessment Manual, 185p. 2007.

Goda, Y., Deformation of Irregular Waves due to Depth- Controlled Wave Breaking, Report on the Port and Harbour Research Institute, Vol. 14, No. 3, pp. 59-106, 1975.

Goda, Y., Y. Kishira, Y. Kamiyama, Laboratory Investigation on the Overtopping Rate of Seawalls by Irregular Waves, Report on the Port and Harbour Research Institute, Vol. 14, No. 4, pp. 3-44, 1975.

Goda, Y., Derivation of Unified Wave Overtopping Formulas for Seawalls with Smooth, Impermeable Surfaces Based on Selected CLASH Datasets. Coastal Engineering, Vol. 56, No. 4, pp. 385-399, 2009.

Van del Meer, Tom Bruce, New Physical Insights and Design Formulas on Wave Overtopping at Sloping and Vertical Structures, J. Waterway, Port, Coast., and Ocean Eng., Vol.140, Issue 6, p.04014025, 2014.

Published
2018-12-30
How to Cite
Tanaka, Y., Suzuyama, K., Higuchi, N., & Shibaki, H. (2018). DEVELOPMENT OF WAVE OVERTOPPING MODEL INCORPORATING WATER OVERFLOW FOR VERTICAL WALLS. Coastal Engineering Proceedings, 1(36), waves.3. https://doi.org/10.9753/icce.v36.waves.3