Affiliation: | a Department of Fluid Mechanics, Abiko Research Laboratory, Central Research Institute of Electric Power Industry (CRIEPI), 1646 Abiko, Abiko City, Chiba 270-1194, Japan b O.H. Hinsdale Wave Research Laboratory, Department of Civil, Construction and Environmental Engineering, 202 Apperson Hall, Oregon State University, Corvallis, OR 97331-2302, USA |