Nonlinear run-ups of regular waves on sloping structures
| Autor: | Tai-Wen Hsu, Shan-Hwei Ou, B.-D. Young, S.-J. Liang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
lcsh:GE1-350
Plane (geometry) Iribarren number Mathematical analysis lcsh:QE1-996.5 lcsh:Geography. Anthropology. Recreation Regular wave lcsh:TD1-1066 Flume lcsh:Geology Nonlinear system lcsh:G Empirical formula Range (statistics) General Earth and Planetary Sciences Development (differential geometry) lcsh:Environmental technology. Sanitary engineering Algorithm lcsh:Environmental sciences Mathematics |
| Zdroj: | Natural Hazards and Earth System Sciences, Vol 12, Iss 12, Pp 3811-3820 (2012) |
| ISSN: | 1684-9981 |
| Popis: | For coastal risk mapping, it is extremely important to accurately predict wave run-ups since they influence overtopping calculations; however, nonlinear run-ups of regular waves on sloping structures are still not accurately modeled. We report the development of a high-order numerical model for regular waves based on the second-order nonlinear Boussinesq equations (BEs) derived by Wei et al. (1995). We calculated 160 cases of wave run-ups of nonlinear regular waves over various slope structures. Laboratory experiments were conducted in a wave flume for regular waves propagating over three plane slopes: tan α =1/5, 1/4, and 1/3. The numerical results, laboratory observations, as well as previous datasets were in good agreement. We have also proposed an empirical formula of the relative run-up in terms of two parameters: the Iribarren number ξ and sloping structures tan α. The prediction capability of the proposed formula was tested using previous data covering the range ξ ≤ 3 and 1/5 ≤ tan α ≤ 1/2 and found to be acceptable. Our study serves as a stepping stone to investigate run-up predictions for irregular waves and more complex geometries of coastal structures. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|