ON THE ESTIMATION OF VELOCITY FIELD BASED ON FLOW DEPTH

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  • 流水深に基づく平面二次元流速の推定

Abstract

<p> The hydraulics of an open channel is summarized in the energy gradient Ie, which can be determined when a pair of v and h is known. Although Ie has conventionally been calculated theoretically based on the coupled equation of motion and continuity, there is no guarantee that such a theoretically calculated Ie based on v and h will match the actual hydraulic Ie. If v can be calculated with the measured depth of flow h known, Ie that matches the actual hydraulic conductivity can be obtained. In this study, we proposed a method of estimating two-dimensional velocities on sandbars by feeding the measured flow depths to a Mass-Consistent model. As a result, it was confirmed that the Mass-Consistent model can calculate the appropriate corrected velocity, and that it agrees with the measured velocity using a laser Doppler velocimeter.</p>

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