HYDRAULIC CHARACTERISTICS AND BED FORM OF THE CHIYODA EXPERIMENTAL CHANNEL

Abstract

The Chiyoda Experimental Channel, which is capable of generating artificial flooding, is the largest full-scale river experimental facility in Japan. Preliminary experiments have been conducted there since FY 2007 to clarify its basic hydraulic characteristics. In FY 2008, discharge measurements were taken using a range of methods, and data under a wider variety of conditions were obtained. The experimental results were used to confirm the feasibility of applying the sand-wave theory obtained in past laboratory experiments to the full-scale Chiyoda Experimental Channel. The coefficients of float used for high-water discharge observation were also verified through comparison with the values calculated based on the results of flow velocity observation using an ADCP. The calculated coefficients of float tended to be too small, which was considered partly due to the influence of sand waves.