抄録
Phase lag of stream meandering to channel curvature is the point of studies on river channel meandering. The stream meandering is generated by centrifugal force basically, but the effect of the force is usually considered by separating into two components; depth averaged component and component of deviation from the average. Existing 1-D theory of channel meandering only takes account of the former. This paper presents a new 1-D formulation of stream meandering in which the both components of the effect of centrifugal force is taken into account by extending a theory that was originally developed for secondary flow calculation. Results of numerical simulation by using the model agree fairly well with experimental data obtained in a meandering channel as well as in a single bending channel. This paper also discusses weight of two kind mechanism of stream meandering through numerical experiments under various hydraulic conditions of meandering channel flow.
