土石流に関する基礎的研究(第二報)

Abstract

In this paper, the velocity distribution and friction coeflicent in sediment ladenflow was discussed with reference to experimental results. There are two regimes inthe sediment laden flow. One is the flow of low concentration, where turbulenceregulates the flow, which are subject to the theory of turbulence flow. The other isthe flow of high concentration, where instead of turbulence, viscosity governs the flow, which should be treated as the flow of non-Newtonian liquid. According to H. A.Einstein et al. and our experiments, experimental results was shown character ofpseudoplastic liquid in case of concentration approximately bOg/liter mean diamater0.16 mm, of Binghem liquid in case of concentration 300g/liter mean diamater 0.0088mm.