Discussion of “Wave setup and setdown generated by obliquely incident waves” by T.-W. Hsu et al., Coastal Engineering, 53, 865–877, 2006

✍ Scribed by Fengyan Shi; James T. Kirby

• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 144 KB
• Volume: 55
• Category: Article
• ISSN: 0378-3839
• DOI: 10.1016/j.coastaleng.2008.08.001

✦ Synopsis

Coastal Engineering, 53, 865-877, 2006)

, the authors derived theoretical formulations for calculating the wave setup and setdown induced by obliquely incident waves on a beach. The derivation of an expression for setdown contains errors which would lead to an imbalance in longshore momentum flux outside the surfzone. We correct their derivation and give results in terms of the radiation stress concept in a general case including an oblique wave incidence. We also point out that the correct form of wave setdown is important to describe the zero-net force in the momentum balance outside the surfzone.