عنوان مقاله [English]
نویسندگان [English]چکیده [English]
The behavior of transport and deposition of cohesive sediments due to electromagnetic and physico- chemical properties of the sediment particles study on is too complexed. One of the important parameters involve in the processes of the cohesive sediments transport is threshold of flow shear stress for deposition. In this research a kind of clay- silty sediment obtained from an embankment dam reservoir near Shahrekord was used. All experiments were carried out in rotating flume model and for this purpose, flow velocity and shear stress in the flume was measured using Acoustic Doppler Velocimeter (ADV). The results showed that the threshold of the shear stress for fully starting of cohesive sediment deposition and critical shear stress obtained to be 1.01 N/m2 and 0.038 N/m2, respectively. Finally relationships were derived for calculate the shear stress threshold, equilibrium concentration of sediments and the deposition rate.