Research Note; Experimental study on the fine sediments shear stress erosion threshold of (case study: Karkeh dam reservoir)

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Samadi Boroujeni Hossin; Khastar Borujeni Milad; Fatahi Rohallah; GHASEMI MARZIEH; TAHERI ZAHRA

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Journal: JOURNAL OF HYDRAULICS Year:2018 | Volume:13 | Issue:3 (133) Page(s): 107-115

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Title

Research Note; Experimental study on the fine sediments shear stress erosion threshold of (case study: Karkeh dam reservoir)

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Keywords

ErosionQ2

Cohesive sedimentQ1

Critical shear stressQ1

Annular flumeQ1

ConsolidationQ2

Abstract

Investigating on the shear stress threshold of Erosion and the Erosion rate of the fine sediment are essential to carry out sediment flushing in dam reservoirs. This work focuses on the determination of shear stress threshold of Erosion of fine sediments deposited in Karkheh dam reservoir. For this propose, an Annular flume was used and the sediment samples were taken from Karkheh dam reservoir. At the first stage, the trends of sedimentation and Consolidation were tested using sedimentation columns for different periods of 3, 14 and 30 days. Experiments in the flume were conducted at different flow shear stress and different initial sediment concentrations. The results showed that concentration of the eroded sediment varied as a function of Consolidation age of bed sediments and bed shear stress. It was also indicated that threshold shear stress of starting Erosion were obtained at 0. 16, 0. 22, and 0. 31 N/m2 for Consolidation ages of 3, 14, and 30 days, respectively. The results showed that the Erosion rate is in a inverse relation with the period of Consolidation, so that in the same stresses, the increase of the Consolidation period will reduce the Erosion rate.

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APA: Copy

Samadi Boroujeni, Hossin, Khastar Borujeni, Milad, Fatahi, Rohallah, GHASEMI, MARZIEH, & TAHERI, ZAHRA. (2018). Research Note; Experimental study on the fine sediments shear stress erosion threshold of (case study: Karkeh dam reservoir). JOURNAL OF HYDRAULICS, 13(3 (133) ), 107-115. SID. https://sid.ir/paper/124209/en

Vancouver: Copy

Samadi Boroujeni Hossin, Khastar Borujeni Milad, Fatahi Rohallah, GHASEMI MARZIEH, TAHERI ZAHRA. Research Note; Experimental study on the fine sediments shear stress erosion threshold of (case study: Karkeh dam reservoir). JOURNAL OF HYDRAULICS[Internet]. 2018;13(3 (133) ):107-115. Available from: https://sid.ir/paper/124209/en

IEEE: Copy

Hossin Samadi Boroujeni, Milad Khastar Borujeni, Rohallah Fatahi, MARZIEH GHASEMI, and ZAHRA TAHERI, “Research Note; Experimental study on the fine sediments shear stress erosion threshold of (case study: Karkeh dam reservoir),” JOURNAL OF HYDRAULICS, vol. 13, no. 3 (133) , pp. 107–115, 2018, [Online]. Available: https://sid.ir/paper/124209/en

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