EXAMINATION OF THE RIVER GEOMORPHOLOGY MONITORING METHOD BASED ON THE UAV PHOTOGRAMMETRY

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  • UAV写真測量に基づく水面下を含めた効率的な河道形状モニタリング手法の検討

Abstract

<p> In this study, we conducted the river geomorphology monitoring based on the UAV photogrammetry with the water surface correction in the Saba River, Yamaguchi Prefecture. Moreover, we compared the survey results of the UAV photogrammetry (UAV with RTK and one without RTK) with those of ALB. As a result, by using UAV photogrammetry for monitoring in the river channel, we could grasp the changes in the sandbars, riverbed, riverbed fluctuation amount, and sediment balance for a short span of time. In addition, the survey results of UAV photogrammetry were not significantly different from those of ALB, suggesting that it can also be applied to the underwater surveys. It was also suggested that by using the UAV with RTK, this method can significantly reduce the survey time, keeping the same accuracy as the survey with the UAV without RTK.</p>

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