A CONVENIENT METHOD FOR MEASURING THE BEACH PROFILES BASED ON LASER PRINCIPLE

The beach profile measurement is the most direct access to the beach topography. This paper presents a convenient beach profile measurement method based on laser principle. Six survey lines were selected for field measurement at Tongan in Xiamen, and the measurement results were compared with those by the total station method. It shows the measurement accuracy is more than 96.7%, and a few large errors were induced by swings of laser rangefinder in wind. This measurement method is simple and rapid, and the measuring point distance can be arbitrarily set. The accumulative errors are not produced easily. It can be used in night and fog days, but not suitable for strong light and large wind weather.