ショートプレゼン2

[P02-21] Applicability of Celerity Equation for Bottom in the Development Process of Alternate Bar

*Michihide Ishihara¹, Hiroyasu Yasuda² (1. Graduate School of Science and Technology, Niigata University, 2. Research Institute for Natural Hazards & Disaster Recovery, Niigata University)

Keywords:Alternate bars, Celerity equation, Stream Tomography, Hyperbolic partial differential equation

Until now, poor understanding of the propagation characteristics of alternate bars, which are wave phenomena, is that the formulation of the theoretical equation for its celerity has not been established. In this study, we firstly derived the two-dimensional theoretical equation for celerity of riverbed waves. Secondly, we verified applicability of its equation for alternate bars using temporal and spacial high-resolution measured values. As a result, we clarified that its equation have high accuracy for estimation of alternate bars celerity if froude number is lower than 1.0.