FLUSHING SEDIMENT THROUGH RESERVOIRS

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TALEB BIDOKHTI N.; NAGHSHINEH A.

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Paper Information

Journal: IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY TRANSACTION B- ENGINEERING Year:2004 | Volume:28 | Issue:B1 Page(s): 119-136

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Information Journal Paper

Title

FLUSHING SEDIMENT THROUGH RESERVOIRS

Author(s)

TALEB BIDOKHTI N. | NAGHSHINEH A. | Issue Writer Certificate

Keywords

RESERVOIR SEDIMENTATION

FLUSHING

RETROGRESSIVE EROSION

CONE FORMATION

FLUSHING CHANNEL

Abstract

About 1% of the total storage capacity in the world’s reservoirs is lost annually due to
sedimentation. Sediments can also block intakes in reservoirs and damage tunnels or turbines. One of
the most effective techniques to remove these sediments is FLUSHING, whereby water level is lowered
sufficiently to re-erode deposits and flush them through the intakes. Outflow sediment discharge may
well be related to the parameters such as the sediment characteristics in the reservoir, during FLUSHING
and geometry of FLUSHING channel.
In this study, laboratory experiments were performed on a 1-D reservoir model in a flume in the
hydraulics laboratory of Shiraz University to investigate the FLUSHING operation processes by using
polymer particles. The polymer particles were lightweight and non-cohesive with an average grain
size of about 2.40 mm and density of 1065.3 (kg/m3). The model was installed in a flume; 30 m long,
1 m wide and 0.75 m height. The length of the test section was 11.5 m, and sediments were placed at
a length of 4.8 m long upstream from the dam position. Experimental runs have been performed for
two flow conditions; 0.0004678 m3/s and 0.000628 m3/s. The very low inflow discharge helped for
better monitoring and measuring of the effective parameters. A sluice gate was placed at the central
bottom of the dam (as the bottom outlet) and was opened at a constant rate to make the complete
drawdown. Results showed that the rate of sediment FLUSHING is strongly associated with outflow rate,
water surface gradient with the dam section and the width of the FLUSHING channel. The results from
this study were in agreement with that in the literature. It is considered that the low density of the
particles causes them to behave as very fine and non-cohesive sediment particles, like loess
sediments.

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APA: Copy

TALEB BIDOKHTI, N., & NAGHSHINEH, A.. (2004). FLUSHING SEDIMENT THROUGH RESERVOIRS. IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY TRANSACTION B- ENGINEERING, 28(B1), 119-136. SID. https://sid.ir/paper/542245/en

Vancouver: Copy

TALEB BIDOKHTI N., NAGHSHINEH A.. FLUSHING SEDIMENT THROUGH RESERVOIRS. IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY TRANSACTION B- ENGINEERING[Internet]. 2004;28(B1):119-136. Available from: https://sid.ir/paper/542245/en

IEEE: Copy

N. TALEB BIDOKHTI, and A. NAGHSHINEH, “FLUSHING SEDIMENT THROUGH RESERVOIRS,” IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY TRANSACTION B- ENGINEERING, vol. 28, no. B1, pp. 119–136, 2004, [Online]. Available: https://sid.ir/paper/542245/en

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