1. Faculty of Marine Sciences, King Abdulaziz University , P. O. Box 80207, Jeddah 21589, Saudi Arabia
2. Department of Maritime Systems Engineering, Texas A&M University , 200 Seawolf Parkway, Galveston, TX 77553, USA
3. US Army Engineer R&D Center, Coastal and Hydraulics Laboratory , Vicksburg, MS 39180-6199, USA