Mir Jafar Sadegh SafariWan Hanna Melini Wan MohtarCharles Bong Hin JooAminuddin AB. GHANIAizat Mohd TaibHaitham AfanAhmed El-ShafieTaib, Aizat MohdSafari, Mir Jafar SadeghAb Ghani, AminuddinWan Mohtar, Wan Hanna MeliniAb. Ghani, AminuddinMohtar, Wan Hanna Melini WanAfan, Haitham AbdulmohsinEL-SHAFIE, AhmedJoo, Charles Bong HinGhanı, Aminuddin Ab.Hin Joo Bong, Charles2025-10-222022[1] Ab. Ghani A. Zakaria N. A. Kassim M. and Nasir B. A. Sediment size characteristics of urban drains in Malaysian cities. Urban Water Journal. 2(4):335341 2000.[2] Ahyerre M. Chebbo G. and Saad M. Nature and dynamics of the water sediment interface in combined sewers. J. Environ. Eng. ASCE. 127(3):233239 2001.[3] AshleyR. M. Wotherspoon D. J. J. Coghlan B. P. and McGregor I. The erosion and movement of sediments and associated pollutants in combined sewers. Water Science and Technology. 25:101-114 1992.[4] Ashley R. M. Bertrand-Krajewski J.-L. Hvitved-Jacobsen T. and Verbanck M. 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J Zhejiang UnivSci A (Appl Phys & Eng). 18(11):882-894 2017.[34] Wan Mohtar W.H.M. and R.J. Munro. Threshold criteria for incipient sediment motion on an inclined bedform in the presence of oscillating-grid turbulence. Phys. Fluids. 25:015103 2013.1300-345310.18400/tekderg.5725292-s2.0-85106564610https://gcris.yasar.edu.tr/handle/123456789/10542https://doi.org/10.18400/tekderg.572529https://search.trdizin.gov.tr/en/yayin/detay/535648This paper analyses experimental data on sediment incipient motion with varying sediment\rbed thickness (of d50 5 10 and 24 mm). Sediment particles (with sizes ranging from 0.5 mm\rto 4.78 mm) were used to evaluate the effect of deposited bed. Variation of shear velocity\restimation was investigated where the critical Shields parameter was expressed using bedslope product u∗cb log-law u∗cl and was extended in terms of critical mean velocity. The\rcritical Shields parameters obtained were significantly lower than the traditional Shields\rcurve when u∗cl was used compared to u∗cb. Higher critical mean velocity is needed for\rshallower deposits.İngilizceinfo:eu-repo/semantics/openAccessİnşaat MühendisliğiSediment Bed ThicknessThreshold Criteria of Sediment MotionShields ParameterArticle