فهرست مطالب mustafa mansuri

Protection of the downstream of culvert outlets against scour process, as a water conveyance structure, is a highly significant issue in design of culverts. In this study, the effect of bed litter length on downstream scour depth is investigated. For this purpose, experiments were carried out on the laminate with different lengths. According to the results, the particle landing at 22%, 33% and 66%, respectively, and the landing at particle landing of 2.5%, respectively. 15%, 20%, and 40% decreased particle depth by 20%, 25%, and 31%, respectively, indicating that bedding has a positive effect on decreasing downstream scour depth. The scour for the flooring considering the length of the layer showed that the scour depth decreases with the increase of the layer length due to the constant landing number.

In this laboratory study, the longitudinal changes of the flooring to the depth of the downstream scour of Calvert (square calvert shape), the changes in the length of the flooring to the depth of scour downstream of the calvert are discussed. For this purpose, experiments were performed on the floor with different lengths. According to the results, 22%, 33% and 66% were observed in particle 2 landing, 15%, 20% and 40% in 2.5 particle landing, respectively, and 20% and 25% in particle 3 landing, respectively. And reduced scour depth by 31%. This showed that changes in floor length and characteristics have a positive effect on the scour depth downstream of Calvert. Therefore, all these results have been studied in the laboratory environment and are real numbers and have been taken on a small scale.