ADCPとRTK-GPSの実測データに基づく掃流砂量推定手法の考察;ADCPとRTK-GPSの実測データに基づく掃流砂量推定手法の考察;Consideration of the Estimation Method of Bed-Load Discharge Based on Measured Data Using Adcp and Rtk-Gps

2 学生会員 準学士(工学) 高知工業高等専門学校専攻科 (〒783-8508 高知県南国市物部乙200-1) Authors developed a bed-load discharge measurement system based on ADCP in the experimental flume and applied it to actual river. In order to verify the applicability of this method, flood flow observation by using tethered boat equipped with ADCP and RTK-GPS were conducted in several Japanese rivers with different grain size. The output data were compared with conventional formula and results of 2D bed deformation analysis using observed discharge and water level data. As a result, relationship between non-dimensional shear stress and non-dimensional bed-load discharge estimated by author's method showed similar tendency with conventional formula even though shear velocity calculated from vertical velocity distribution was larger than the other calculated values.