Experimental and numerical investigation of water-surface characteristics at crossing connected non-orthogonally to four flat channels

Abstract Most studies on the flood flow characteristics at a crossing focus channels connected orthogonally or right angle, but non-orthogonally remain limited. In this study, hydraulic-model experiments and numerical simulations are performed to analyze of water-surface variation in around four flat channels. Comparison measured simulated water depth distributions indicates that results relatively good agreement. experiment where angle between two upstream is 45°, pattern corresponds approximately Type I proposed by Mignot et al. (2008). However, it was found there no any type correspond case 135°. For analyzing with inflow, simulation setting inflow ratio inlet one, three, six, respectively.