Sand Waves 上の流れについて

Abstract

Laboratory experiments for the flow on sand waves in rectangular crossecton channelreveale the existence of velocity fluctuation owing to the boundary variation. This paperdescribes the results of an analysis to relate the mean length of sand waves in straightalluvial channels to the flow parameters. This analysis is based upon a concept oftransverse oscillation of water stage that is one of the cause of velocity fluctuations. Theresults are compared with many experimental and actual river data with good agreement.It suggests that the seiche theory is the most powerfull one in many theories on thegenetation of meander.