@article { author = {Khalili Shayan, H. and Farhoudi, J.}, title = {Scour Profiles and Variation of Shear Stresses in Scour Holes Downstream of Adverse Stilling Basins}, journal = {Journal of Hydraulics}, volume = {7}, number = {4}, pages = {85-99}, year = {2013}, publisher = {Iranian Hydraulic Association}, issn = {2345-4237}, eissn = {2645-8063}, doi = {10.30482/jhyd.2013.85358}, abstract = {This research is focused on local scour downstream of adverse stilling basins where the flow jet wasissuing from a submerged sluice gate. Totally, 233 tests were performed and 3262 scour profiles wererecorded in a wide range of Froude numbers, sediment grain sizes, tail-water depths, stilling basinlengths and bed slopes. The results showed that the scour holes are self-similar at any slopes. Apolynomial equation was derived to define the non-dimensional scour profiles at different slopes. In acertain condition of sediment grain Froude number, tail-water depth and length of basin, a change inthe slope of basin from 0 to 15.6%, caused a decrease of 15% in maximum depth of scour hole. Atheoretical approach was also derived to evaluate the bed shear stress, weight shear stress and shearstress at threshold state along the scour hole. It was found that the weight and bed shear stresses alongthe scour hole follow a time-dependent similar trend of variation. Finally, the geometry of basin wasinvestigated to examine its effects on the weight and bed shear stresses.}, keywords = {}, title_fa = {نیم رخ های آب شستگی و تغییرات تنش های برشی در حفره در پایاب حوضچه های آرامش با شیب معکوس}, abstract_fa = {}, keywords_fa = {}, url = {https://jhyd.iha.ir/article_85358.html}, eprint = {https://jhyd.iha.ir/article_85358_bc5759a018f143fd092bc08a89c52ae1.pdf} }