2015 Volume 21 Pages 77-82
In this study, the authors showed the discharge calculating method in the high runoff using Space-Time-Image-Velocimetry (STIV) and Dynamic Interpolation and Extrapolation (DIEX) method. We could measure the flood surface flow under the low light and bad weather condition using extended ISO sensitive camera in actual river. This reason was that surface wave image was capable to clearly analyzed at the night time and rainy condition. But, it was difficult to measure the Space-Time-Image (STI) at the low water. The water ripples corresponds to the brightness distribution. For the successful analysis using STIV was needed to require more than 10 standard deviations of brightness distribution. The calculated discharge by STIV and DIEX method had a higher correlation with H-Q equation. We showed it was possible to observe to the quickly observation and manpower saving.
