Author(s): Kazuhide Dan, Atsushi Kishi
Linked Author(s): Kazuhide Dan
Keywords: Optical wave profile measurement, sunlight intensity profile, Suzuki-Sumino�s method
Abstract: When sunlight waves travel into the interface between water and air, a part of the sunlight waves refracts at this interface. The observed sunlight intensity profiles related to wave profiles were recorded at the observation board below the transparent acrylic test channel in experiment. It is possible to calculate the wave profile by applying modified Suzuki-Sumino's method to this recorded sunlight intensity profile. The relative errors which show the accuracy is introduced as the value of the difference between the calculated wave height and the measured wave height using the wave meter divided by the measured wave height. This accuracy of wave profile depends on the weather (fine or cloudy), the incident angle of the sunlight, the water depth, the wave steepness, the refractive index of the bottom, the incident wave length and the distance between the bottom and the observation board. It is confirmed that the relative error increases as the water depth increases and the refractive index increases and the brightness in the still water surface increases; and the relative error decreases as the distance between the channel bottom and the observation board decreases
Year: 2017