LABORATORY DETERMINATION OF DISCHARGE CAGACITY OF EMERGENCY AND SERVICE GATES IN BOTTOM OUTLET DAMS (CASE STUDY OF NARMASHEER DAM BOTTOM OUTLET)

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HOSSEINI S.A.; SANEIE M.

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Paper Information

Journal: IRANIAN JOURNAL OF WATERSHED MANAGEMENT SCIENCE AND ENGINEERING Year:2010 | Volume:4 | Issue:12 Page(s): 53-60

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Title

LABORATORY DETERMINATION OF DISCHARGE CAGACITY OF EMERGENCY AND SERVICE GATES IN BOTTOM OUTLET DAMS (CASE STUDY OF NARMASHEER DAM BOTTOM OUTLET)

Author(s)

HOSSEINI S.A. | SANEIE M. | Issue Writer Certificate

Keywords

BOTTOM OUTLETQ3

EMERGENCY GATEQ3

SERVICE GATEQ3

DISCHARGE COEFFICIENT AND PHYSICAL MODELQ2

Abstract

BOTTOM OUTLETs are series of structures that were used to convey water from dam reservoir to the downstream. Accordingly, because of the importance of BOTTOM OUTLET Systems in dams, analyzing the performance of conduit, gates and outlet is considerable. The existence of high-pressure flow in the BOTTOM OUTLET channel, the various kinds of head losses and the small amount of opening height versus the reservoir head over the gate cause considerable errors in the required mathematical methods and relationships.Therefore the need for laboratory studies in this regard is essential. The purpose of the present study is to determine hydraulic capacity of Narmasheer Dam BOTTOM OUTLET Narmasheer the lower dam using data obtained from physical model.In this research, the physical model of BOTTOM OUTLET system of Narmasheer Dam including conduit, gates (service and emergency) and outlet was designed and constructed at SCWMRI (Soil Conservation and Water Management Research Institute) lab, and then the necessary tests have been performed.The different amounts of pressure heads and water discharges in various gate openings were measured for 6 different head of reservoir and 12 opening gate.The results showed that the trend of SERVICE GATE discharge Hydraulic coefficient changes at maximum head, from 2 to 10 percent gate opening, had an increasing rate and for 10 to 30 percent opening, had a decreasing rate and then from 30 to 70 percent opening, the rate of discharge coefficient was the highest this trend was also observed in other elevation. Therefore, the rate of change of discharge coefficient at two low elevations from 50 percent and higher will start the changes of Froude number showed that with increasing the level of reservoir, Froude number will increase and at fixed level of reservoir, with an increase of gate. Opening Froude number will decrease. This process also tested other heads of reservoir be seen, but trend coefficient changes in two head lower, from 50 percent opening gate, begins to increase. Overall change in coefficient showed an increase amount of valve coefficient opening gate, be increased.Investigation of the discharge change showed with increases in opening gates, the rate of discharge will increased.Froude number changes showed with increase amounts of head reservoir tank Froude number will increased, and in fixed of head tank, with increasing the amount of valve opening gate Froude number will reduced.

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آزمایش مدل هیدرولیکی دریچه کشویی تونل تخلیه تحتانی سد مارون

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APA: Copy

HOSSEINI, S.A., & SANEIE, M.. (2010). LABORATORY DETERMINATION OF DISCHARGE CAGACITY OF EMERGENCY AND SERVICE GATES IN BOTTOM OUTLET DAMS (CASE STUDY OF NARMASHEER DAM BOTTOM OUTLET). IRANIAN JOURNAL OF WATERSHED MANAGEMENT SCIENCE AND ENGINEERING, 4(12), 53-60. SID. https://sid.ir/paper/134862/en

Vancouver: Copy

HOSSEINI S.A., SANEIE M.. LABORATORY DETERMINATION OF DISCHARGE CAGACITY OF EMERGENCY AND SERVICE GATES IN BOTTOM OUTLET DAMS (CASE STUDY OF NARMASHEER DAM BOTTOM OUTLET). IRANIAN JOURNAL OF WATERSHED MANAGEMENT SCIENCE AND ENGINEERING[Internet]. 2010;4(12):53-60. Available from: https://sid.ir/paper/134862/en

IEEE: Copy

S.A. HOSSEINI, and M. SANEIE, “LABORATORY DETERMINATION OF DISCHARGE CAGACITY OF EMERGENCY AND SERVICE GATES IN BOTTOM OUTLET DAMS (CASE STUDY OF NARMASHEER DAM BOTTOM OUTLET),” IRANIAN JOURNAL OF WATERSHED MANAGEMENT SCIENCE AND ENGINEERING, vol. 4, no. 12, pp. 53–60, 2010, [Online]. Available: https://sid.ir/paper/134862/en

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