Abstract
Bed regulation works such as groins are effective measures to control the deformation of river bed near hydraulic structures. Myoken-zeki weir was constructed in the Shinano river in 1990. The result of this study shows the bed variation upstream from the weir according to installation locations of the bed regulation work, and the rectifiable effect of the weir on the downsream bed variation. The appropriateness of this measure has been proved by the floods that have happened after the construction. Further, it is confirmed that the results of river bed variation by the field measurement, the physical model tests and the numerical simulations coincide well. It was proved that both methods of physical model tests and numerical simulation adopted in the present paper provided a useful means for the design of river bed regulation works.
