| The authors of this paper have examined to establish an automatic water-discharge measurementsystem with a fixed type Non-Contact Current Meter, especially Radio wave type. In this system, it is important to establish the velocity index to convert the water surface velocity into the cross-sectional mean velocity. To establish the velocity index, ADCP traverse measurements were conducted in some actual rivers. From the result of the measurement, it was shown that the velocity index was constant in rivers without river-bed change, while the index showed clear duration in rivers with river-bed change during flooding. The authors proposed the system which can calculate the changing index in real-time during flooding and showed the system was useful under certain conditions. |
