Abstract
In this study, the effects of the fluvial wood zone in landside upon overflow characteristics of flood flows are investigated experimentally, theoretically and numerically. The wood zone arranged on gently sloped back face of levee is considered. It is found that river water level is heading-upped by the woods zone, so that overflow characteristics in the vicinity of the crown of the levee may be changed from complete to locally submerged outflows, depending on characteristics of the wood zone, levees and flood flows. It may cause such a problem that river water level and overflow discharge are unable to be related. A discharge formula, that includes both effects of characteristics of the wood zone and levees, is developed for this purpose, and is validated through experimental and numerical investigations.
