A STUDY OF THE EFFECTS OF LONGITUDINAL ARRANGEMENT OF SUBMERGED VANES ON CHANNEL BED CONFIGURATION AND INCREASING RELATIVE EFFICENCY INPOUNDMENT AND DECREASING SEDIMENTATION NEAR THE INTAKE STRUCTURES

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YONESI H.; OMID M.H.; KASHEFIPOUR M.

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Paper Information

Journal: THE SCIENTIFIC JOURNAL OF AGRICULTURE (SJA) Year:2005 | Volume:27 | Issue:(Special Issue of Water Science Engineering) Page(s): 137-150

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Title

A STUDY OF THE EFFECTS OF LONGITUDINAL ARRANGEMENT OF SUBMERGED VANES ON CHANNEL BED CONFIGURATION AND INCREASING RELATIVE EFFICENCY INPOUNDMENT AND DECREASING SEDIMENTATION NEAR THE INTAKE STRUCTURES

Author(s)

YONESI H. | OMID M.H. | KASHEFIPOUR M. | Issue Writer Certificate

Keywords

SUBMERGED VANESQ4

INTAKE PORTQ4

SEDIMENTATIONQ4

Abstract

Constructing intake structures in order to deviate a part of flow from the rivers causes some changes in hydraulic conditions of flow in the front of INTAKE PORT. The changes, as flow in river bends, reinforce the secondary flows, cause SEDIMENTATION in the INTAKE PORT and erosion in the bank facing INTAKE PORT. Those conditions finally deviate the river thalweg toward the facing bank. To overcome such a problem in the intake places, a number of solutions the latest of which is SUBMERGED VANES have been applied. SUBMERGED VANES have been used for different purposes such as reducing erosion in river bends, bank stabilization, increasing inpoudment efficiency and so on. The vanes are installed with an angle of 15 to 25 agrees to the flow direction and their initial height being about 20% to 50% of the flow depth. The performance of the SUBMERGED VANES that is based on making revolving currents in downstream to reduce the effects of secondary flows depends on the longitudinal and widthwise distance, angle of the installation and longitudinal arrangement of the vanes. In this study, the possibility of the use of SUBMERGED VANES to control and direct the flow and river thalweg toward the INTAKE PORT with different longitudinal arrangement has been investigated. Three longitudinal distances 3H, 4H and 6H (H, being the initial height of the vanes) have been considered and the experiments have been done for the regular and zigzag arrangement for different discharges.The results show that the use of the SUBMERGED VANES in the longitudinal distance (3H - 6H) in regular and zigzag arrangement make it possible to direct the thalweg toward the INTAKE PORT and with the use of the SUBMERGED VANES, a trench is made toward the INTAKE PORT which increases the inpoundment efficiency by 36%-95% in regular arrangement and 21%-'65% in zigzag arrangement. The SUBMERGED VANES can also reduce the SEDIMENTATION by 15%-40% in comparison with intakes without the vanes. From the total experimental results, it can be concluded that the regular arrangement of the vanes and the longitudinal distance of 4H show the best performance in changing the thalweg of channel increasing impoundment terurn and decreasing the intake SEDIMENTATION.

Cites

EFFECT OF SUBMERGED VANES ON INTAKE RATIO AND WATER SURFACEPROFILE AT 90O DIVERSION

References

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APA: Copy

YONESI, H., OMID, M.H., & KASHEFIPOUR, M.. (2005). A STUDY OF THE EFFECTS OF LONGITUDINAL ARRANGEMENT OF SUBMERGED VANES ON CHANNEL BED CONFIGURATION AND INCREASING RELATIVE EFFICENCY INPOUNDMENT AND DECREASING SEDIMENTATION NEAR THE INTAKE STRUCTURES. THE SCIENTIFIC JOURNAL OF AGRICULTURE (SJA), 27((Special Issue of Water Science Engineering)), 137-150. SID. https://sid.ir/paper/24670/en

Vancouver: Copy

YONESI H., OMID M.H., KASHEFIPOUR M.. A STUDY OF THE EFFECTS OF LONGITUDINAL ARRANGEMENT OF SUBMERGED VANES ON CHANNEL BED CONFIGURATION AND INCREASING RELATIVE EFFICENCY INPOUNDMENT AND DECREASING SEDIMENTATION NEAR THE INTAKE STRUCTURES. THE SCIENTIFIC JOURNAL OF AGRICULTURE (SJA)[Internet]. 2005;27((Special Issue of Water Science Engineering)):137-150. Available from: https://sid.ir/paper/24670/en

IEEE: Copy

H. YONESI, M.H. OMID, and M. KASHEFIPOUR, “A STUDY OF THE EFFECTS OF LONGITUDINAL ARRANGEMENT OF SUBMERGED VANES ON CHANNEL BED CONFIGURATION AND INCREASING RELATIVE EFFICENCY INPOUNDMENT AND DECREASING SEDIMENTATION NEAR THE INTAKE STRUCTURES,” THE SCIENTIFIC JOURNAL OF AGRICULTURE (SJA), vol. 27, no. (Special Issue of Water Science Engineering), pp. 137–150, 2005, [Online]. Available: https://sid.ir/paper/24670/en

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