EXPERIMENTAL STUDY ABOUT EFFECT OF SEDIMENT TRANSPORT ON FLOW VELOCITY DISTRIBUTION

Abstract

 These days, numerical simulation technology and measurement technique have improved. However, there are still some problems about estimating how real river bed morphology change, especially calculating of amount of sediment flow. First of all, in this paper, the effects of sediment movement on flow velocity distribution are indicated in order to estimate hydraulics roughness in respect of calculating of amount of sediment flow. Some series of flume experients have been taken in order to measure flow velocity distribution including sediment flow. PIV by using fluorescent pigment as tracer can measure flow velocity distribution in the condition that water flow including sediment transport. These data give informations about characteristics of flow velocity distribution near bed. And some results indicate thickness of sediment flow is important for bed roughness condition.