十勝川千代田実験水路における各手法別の流量観測

抄録

The Chiyoda Experimental Channel, which is capable of generating artificial flooding, is the largest full-scale river experimental facility in Japan. Since 2007, we conducted preliminary experiments to clarify the basic characteristics of the channel, and experiments of levee breach in three-dimensions using Chiyoda Experimental Channel. The experiments used various types of observation instruments, which are ADCP, acoustic current meter, radio current meter to measure the detailed river flow. This report focused on the limitation of such observation under the high- speed velocity and muddy water condition. In addition, we attempted velocity correction of radio current meter using the ratio of surface velocity and cross sectional mean velocity. And we examined switching method for the sectional area of the stream before and after experiment smoothly by using the friction speed. As a result, the calculation value of both has agreed well with the actual measurement value observed with ADCP.