نوع مقاله : مقاله پژوهشی
1 دانشیار سازه های آبی، دانشگاه شهرکرد
2 کارشناس ارشد سازه های آبی، دانشگاه شهرکرد
3 دانشیار سازه های دریایی، دانشگاه امیرکبیر
4 کارشناس ارشد سازه های دریایی دانشگاه امیرکبیر
عنوان مقاله [English]
Interaction between water flow and bed erodibility, which is associated with sediment transport and creat bed forms. Ripples are the smallest of the bed forms. Experiments were performed with variety slopes of 0.0005 to 0.003 and discharges of 10 to 40 L/S, on the artificial ripple in the hydraulic Laboratory of Shahrekord University.Velocity measurements were collected using an Acoustic Doppler Velocimeter. It was observed the peak value of bed shear stress was appear on the midpoint of upstream surface and the lowest value appear on the crest. From the crest to trough, the general bed shear stress was in a trend of increasing. It was also observed that in the case of ripples bed forms were consist of about 26% of total bed shear stress.