2013 Volume 19 Pages 289-294
The lower reaches of the Shinano River have many branches, a bifurcation point and two confluence points within 5km. In Niigata Fukushima heavy rain in 2011, a backward flow was observed at Shinano river. It means channel network flow like the Shinano River has strong interaction of each river flow. This characteristic makes controlling flood by River Management Facilities and calculating discharge by H-Q curve using measured water level extremely difficult. For these reasons, it is important to understand characteristics of channel network flow. This study investigate interaction of channel network flow in lower reaches of the Shinano River with measured value and 2D-computation model. The results indicate that backward flow is functioning as retarding basin.
