ADCPとRTK-GPS搭載橋上操作艇を用いた 定点・曳航観測から得られた水深平均流速，摩擦速度および掃流砂速度の考察

抄録

Simultaneous observation of flood flow and bed load velocity by using a boat-mounted ADCP and the Real Time Kinematic Global Positioning System (RTK-GPS) was carried out in several rivers. Depth- averaged velocity, bed-load velocity and shear velocity data measured by stationary and moving observation were compared to examine the practical observation method of flood discharge and bed-load. Coefficient of variation CV of measured data were used to evaluate the measurement accuracy of depth- averaged velocity and bed-load velocity. These results indicate that more practical observation routine is the combination with stationary and moving observation.