実河川の可視化表面流速分布データを利用した水深分布の推定に関する研究

抄録

The float method is a standard method for flood discharge measurement but safeness and efficiency are limited. LSPIV (Large-scale Particle Image Velocimetry), as a flow visualization method, can avoid these problems. Johnson and Cowen (2016) suggested a method to calculate the local flow depth based on LSPIV results and proofed the method through laboratory experiments. This study utilizes the method to the Uji river for predicting the local flow depth. Large-scale velocity fluctuation modes in the river disturb the calculation of the integral-length scale. Proper Orthogonal Decomposition has applied to remove the large-scale velocity fluctuation.