A Flow Pattern Study Of Temenggor Dam Hydraulic Physical Model
Recently, the sustainability of hydroelectric dams has been questioned due to their reliability and efficiency. Factors such as sedimentation, erosion and vortex formation at the dams have adversely impacted the sustainability of the dam to function optimally. A stable and uniform flow pattern at...
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| Main Author: | |
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| Format: | Monograph |
| Language: | English |
| Published: |
Universiti Sains Malaysia
2022
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| Subjects: | |
| Online Access: | http://eprints.usm.my/57728/1/A%20Flow%20Pattern%20Study%20Of%20Temenggor%20Dam%20Hydraulic%20Physical%20Model.pdf http://eprints.usm.my/57728/ |
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| Summary: | Recently, the sustainability of hydroelectric dams has been questioned due to
their reliability and efficiency. Factors such as sedimentation, erosion and vortex
formation at the dams have adversely impacted the sustainability of the dam to function
optimally. A stable and uniform flow pattern at the dam’s upstream is important to ensure
the sustainability of dam is preserved due to minimal impacts of erosion, sedimentation
and vortex. The study had assessed the potential of sedimentation, erosion and vortex
formation at Temenggor Dam, based on the flow pattern formed via hydraulic physical
model with a scale of 1:100. There are four cases have been tested which are Case 1 (the
position of water inlet at the middle and at stage of 0.38m), Case 2 (the position of water
inlet at the middle and at stage 0.34m), Case 3 (the position of water inlet at the side and
at stage of 0.38m) and Case 4 (the position of water inlet at side and at stage 0.34m).
Based on Case 3, the range of flow velocities obtained was 0.3 – 2.1 m/s at 20% from
water surface, leading to erosion which occurred alongside the bank of the dam and
sedimentation which focussed on the side of the dam that threatened the stability of the
dam due to the concentrated load of sediment. Vortex type 5 – 6 had been identified for
a period of 15-30s which requires immediate preventive measures to ensure sustainability
of the Temenggor Dam. The study found that flow pattern at the upstream of the
Temenggor Dam was influenced by the position of water inlet from dam’s upstream,
flowrate of the dam and the depth from the water level. |
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