Field Measurements of Suspend Particle Materials of Bottom Boundary Layer using Turbidity Sensor, in-situ Laser Scattering Type Particle Distribution Measuring Device and Acoustic Measuring Instrument on Jyoban Coast in Japan

Abstract

To understand the characteristics of the bottom boundary layer, movements of suspended particle material and its related radionuclide transport on Jyoban coast, the field measurement was conducted at the shallow water depth (30m) by using turbidity sensor, in-situ laser scattering type particle distribution measuring device and acoustic measuring instruments. The survey results have shown that large particles more than about 200μm appeared with the low turbidity in calms, though small particles covered with the high turbidity in storms. Furthermore, it was revealed that the increased turbidity ranged from the bottom to about 10m in height by using acoustic measuring instruments.