河床波上の浮遊砂の運動機構

Abstract

The characteristics of flow vary with space over sand waves. It is important to consider thisnouniformity in the modeling of motions of suspended particles, but few methods for calculationof suspended load have been proposed by consideration of this efects. In this paper mean velocityand turbulent strength of flow are discussed experimentally over a two-dimensinal sand wave andthe motion of suspended particle are formulated using these results and authors' theory on modelof particle motion over plane bed. The probability density function of heigth and step length ofsuspended particle are calculated, and theoretical results are found to fit experimental results well.Then the distribution of pick-up rate along a sand wave is calculated based on this theory.