Fariba Sadat Esfahani - M.Sc Student of Hydraulic Structure of Shiraz University
Ali Reza Keshavarzi - Associate Professor of Water Engineering Department of Shiraz University

In this study an effort was made to compare flow structure inside two river meander models with different curvatures (relative curvature of model 1=2.6, model 2=4.43), experimentally. Flow velocity was measured in a fine grid from the bed to the water surface in 360 different points in each model using ADV. As a result, situation of maximum tangential velocity moves from near bed to near the water surface in depth by decreasing the curvature. Also it was found that the effect of centripetal force of previous and next bend on bed topography and flow structure of second bend in model 1 is stronger than model 2.

Flow structure, River meander, Different curvature, ADV