Rehabilitation Of Trash Screen At Jor Reservoir Low Level Outlet

Lariyah Mohd Sidek, IR JANSEN LUIS, PIERRE Y. JULIEN

Research output: Contribution to conferencePaper

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Abstract

Jor reservoir was constructed to assure flow regulation for the Woh hydroelectric
power station, as well as to provide storage for flood control. The reservoir outlet is frequently
operated once every three months to flush the deposited sediments accumulated within the
reservoir. Preliminary testing and inspection on the reservoir outlet revealed that the trash
screen located at upstream of reservoir outlet had been damaged and dislodged creating a large
opening at the trash screen thus permitting entry of larger logs which blocks the passage of
water through the reservoir outlet. Bathymetric survey showed the total height of sediment
deposition above the reservoir outlet covering the trash screen was estimated at approximately
13 m. The sediment volume estimated to be cleared from above the reservoir outlet area is
15,000 m3
. Soil investigation conducted shows that the sediments deposited within the reservoir
exhibits various different profile and characteristics. The average sediment distribution at
deeper depths closer to the trash screen was found to be of 27% clay, 26% silt, 43% sand and
4% gravel. The rehabilitation works on structure as the low level outlet serves as an important
feature for reservoir sedimentation management as well as for safe flood discharge release as
designed for the dam. It is important that the function of the reservoir outlet structure is
maintained in accordance to the International Dam Safety Standards.
Original languageEnglish
Publication statusAccepted/In press - 22 Aug 2014

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sediment
dam
rehabilitation
bathymetric survey
flow regulation
flood control
vertical distribution
gravel
silt
sedimentation
clay
sand
soil
safety standard
inspection
station

All Science Journal Classification (ASJC) codes

  • Environmental Science(all)
  • Earth and Planetary Sciences(all)

Cite this

Mohd Sidek, L., LUIS, IR. JANSEN., & JULIEN, PIERRE. Y. (Accepted/In press). Rehabilitation Of Trash Screen At Jor Reservoir Low Level Outlet.
@conference{58413015f44649a1b395e2b290de105d,
title = "Rehabilitation Of Trash Screen At Jor Reservoir Low Level Outlet",
abstract = "Jor reservoir was constructed to assure flow regulation for the Woh hydroelectricpower station, as well as to provide storage for flood control. The reservoir outlet is frequentlyoperated once every three months to flush the deposited sediments accumulated within thereservoir. Preliminary testing and inspection on the reservoir outlet revealed that the trashscreen located at upstream of reservoir outlet had been damaged and dislodged creating a largeopening at the trash screen thus permitting entry of larger logs which blocks the passage ofwater through the reservoir outlet. Bathymetric survey showed the total height of sedimentdeposition above the reservoir outlet covering the trash screen was estimated at approximately13 m. The sediment volume estimated to be cleared from above the reservoir outlet area is15,000 m3. Soil investigation conducted shows that the sediments deposited within the reservoirexhibits various different profile and characteristics. The average sediment distribution atdeeper depths closer to the trash screen was found to be of 27{\%} clay, 26{\%} silt, 43{\%} sand and4{\%} gravel. The rehabilitation works on structure as the low level outlet serves as an importantfeature for reservoir sedimentation management as well as for safe flood discharge release asdesigned for the dam. It is important that the function of the reservoir outlet structure ismaintained in accordance to the International Dam Safety Standards.",
author = "{Mohd Sidek}, Lariyah and LUIS, {IR JANSEN} and JULIEN, {PIERRE Y.}",
year = "2014",
month = "8",
day = "22",
language = "English",

}

Rehabilitation Of Trash Screen At Jor Reservoir Low Level Outlet. / Mohd Sidek, Lariyah; LUIS, IR JANSEN; JULIEN, PIERRE Y.

2014.

Research output: Contribution to conferencePaper

TY - CONF

T1 - Rehabilitation Of Trash Screen At Jor Reservoir Low Level Outlet

AU - Mohd Sidek, Lariyah

AU - LUIS, IR JANSEN

AU - JULIEN, PIERRE Y.

PY - 2014/8/22

Y1 - 2014/8/22

N2 - Jor reservoir was constructed to assure flow regulation for the Woh hydroelectricpower station, as well as to provide storage for flood control. The reservoir outlet is frequentlyoperated once every three months to flush the deposited sediments accumulated within thereservoir. Preliminary testing and inspection on the reservoir outlet revealed that the trashscreen located at upstream of reservoir outlet had been damaged and dislodged creating a largeopening at the trash screen thus permitting entry of larger logs which blocks the passage ofwater through the reservoir outlet. Bathymetric survey showed the total height of sedimentdeposition above the reservoir outlet covering the trash screen was estimated at approximately13 m. The sediment volume estimated to be cleared from above the reservoir outlet area is15,000 m3. Soil investigation conducted shows that the sediments deposited within the reservoirexhibits various different profile and characteristics. The average sediment distribution atdeeper depths closer to the trash screen was found to be of 27% clay, 26% silt, 43% sand and4% gravel. The rehabilitation works on structure as the low level outlet serves as an importantfeature for reservoir sedimentation management as well as for safe flood discharge release asdesigned for the dam. It is important that the function of the reservoir outlet structure ismaintained in accordance to the International Dam Safety Standards.

AB - Jor reservoir was constructed to assure flow regulation for the Woh hydroelectricpower station, as well as to provide storage for flood control. The reservoir outlet is frequentlyoperated once every three months to flush the deposited sediments accumulated within thereservoir. Preliminary testing and inspection on the reservoir outlet revealed that the trashscreen located at upstream of reservoir outlet had been damaged and dislodged creating a largeopening at the trash screen thus permitting entry of larger logs which blocks the passage ofwater through the reservoir outlet. Bathymetric survey showed the total height of sedimentdeposition above the reservoir outlet covering the trash screen was estimated at approximately13 m. The sediment volume estimated to be cleared from above the reservoir outlet area is15,000 m3. Soil investigation conducted shows that the sediments deposited within the reservoirexhibits various different profile and characteristics. The average sediment distribution atdeeper depths closer to the trash screen was found to be of 27% clay, 26% silt, 43% sand and4% gravel. The rehabilitation works on structure as the low level outlet serves as an importantfeature for reservoir sedimentation management as well as for safe flood discharge release asdesigned for the dam. It is important that the function of the reservoir outlet structure ismaintained in accordance to the International Dam Safety Standards.

M3 - Paper

ER -