2009 Volume 15 Pages 273-278
The sediment transports in stony-bed rivers is different from gravel-bed rivers or sand-bed rivers. Authors have investigated the mechanism of sediment transport and stable cross sectional form and clarified characteristics of grain size distributions on stony-bed rivers by performing field experiments in the Joganji River. Currently, stony-bed rivers have degraded their bed elevation, due to the past extraction of bed materials and lack of bed materials transported from the upper region. Then, hydraulic structures such as levee of stony-bed rivers are susceptible to break by large momentum of flood flows. It is important to know how much stone and gravel layer is needed to maintain river bed level properly.
In this study, we investigated the development of river bed level recovery method by using large stones. Secondly we showed the usefulness of 2D riverbed variation analysis for this technology development.
