Abstract
In the present experimental research, effect of different heights of obstacle on turbidity current, to control the sedimentation in a reservoir, was investigated. Experiments were carried out with horizontal and steep bed slopes and different flow conditions. To see the effect of obstacle on concentration of overflow turbidity current, some experiments were carried out without an obstacle. Results showed that concentration of the currents without obstacle reduced exponentially by distance from the entrance gate. More reduction of density and dilution of the currents were observed in the presence of an obstacle, especially with increasing the heights. Increasing height of obstacle also improved their trap efficiency. Moreover, it was concluded that effect of the presence of an obstacle was less intense in a steep bed slope of the reservoir than in a horizontal one.
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Alexander J and Morris S 1994 Observations on experimental, non-channelized, high-concentration turbidity currents and variations in deposits around obstacles. J. Sediment Res. 64(4): 899–909
Asghari Pari S A, Kashefipour S M, Ghomeshi M and Shafaie Bajestan M 2010 Effects of obstacle heights on controlling turbidity currents with different concentrations and discharges. J. Food Agriculture Environment 8(2): 930–935
Bursik M I and Woods A 2000 The effect of topography on sedimentation from particle-laden turbulent density currents. J. Sedimentary Res. 70(1): 53–63
De Cesare G, Schleiss A and Hermann F 2001 Impact of turbidity currents on reservoir sedimentation . ASCE J. Hydraulic Eng. 127(1): 6–16
Fan J and Morris G 1992 Reservoir sedimentation. II: Reservoir desiltation and long term storage capacity . ASCE J. Hydraulic Eng. 118(3): 370–384
Lane-Serff G F, Beal L M and Hadfield T D 1995 Gravity current flow over obstacles. J. Fluid Mech. 292: 39–53
Morris G L and Fan J 1998 Reservoir sedimentation handbook. Design and management of dams, reservoirs and watersheds for sustainable use. New York: McGraw-Hil
Oehy C H and Schleiss A 2007 Control of turbidity currents in reservoirs by solid and permeable obstacles . ASCE J. Hydraulic Eng. 133(6): 637–648
Oehy C H, De Cesare G and Schleiss A 2010 Effect of inclined jet screen on turbidity current. J. Hydraulic Res. 48(1): 81–90
Prinos P 1999 Two-dimensional density currents over obstacles. Proceeding of 28 th IAHR Congress, Graz, Austria, Theme D
Rottman J W, Simpson J E, Hunt J C R and Britter R E 1985 Unsteady gravity current flows over obstacle: Some observations and analysis related to phase II trials. J. Hazardous Mater. 11: 325–340
Woods A W, Bursik M I and Kurbatov A V 1998 The interaction of ash flows with ridges. Bull. Volcanol. 60: 38–51
Yu W S, Lee H Y and Hsu S H M 2000 Experiments on deposition behavior of fine sediment in a reservoir . ASCE J. Hydraulic Eng. 126(12): 912–920
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MAROSI, M., GHOMESHI, M. & SARKARDEH, H. Sedimentation control in the reservoirs by using an obstacle. Sadhana 40, 1373–1383 (2015). https://doi.org/10.1007/s12046-015-0333-2
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DOI: https://doi.org/10.1007/s12046-015-0333-2