Abstract
Critical conditions of bottom sediment erosion were examined in a large test flume for practical estimations of mud suspension in Lake Kasumigaura. The experiments were directed to investigate how planar jet, which brings mean shear flow and turbulent fluctuations, erodes the fluid mud in the lake.
The results of the experiments were analyzed for relationships between critical water content of the mud and a combined index of mean velocity and velocity fluctuation. A relational expression was derived using least square method. The expression simulated the experimental results of critical water content distributions quite well.
