Water quality of Bakun Hydroelectric Dam Reservoir, Sarawak, Malaysia, during the construction of Murum dam / Lee Nyanti, Teck-Yee Ling and Theresa Muan

Lee, Nyanti and Ling, Teck-Yee and Muan, Theresa (2015) Water quality of Bakun Hydroelectric Dam Reservoir, Sarawak, Malaysia, during the construction of Murum dam / Lee Nyanti, Teck-Yee Ling and Theresa Muan. Esteem Academic Journal, 11 (1). pp. 81-88. ISSN 1675-7939

Abstract

Since Bakun Hydroelectric Reservoir was filled, there has not been any published literature on its water quality. A previous study conducted during its filling stage showed that the DO level dropped very rapidly and the water was
turbid. Since water quality was expected to improve over time, this study was carried out. Six stations and 3 depths at each station were investigated. Results show that dissolved oxygen at 0.5 m depth ranged from 6.25 to 7.02 mg/L but the water was anoxic at 15 m and 30 m depths. pH at 0.5 m depth in the reservoir ranged from 7.37 to 7.73 and decreased with depth to acidic condition. In the
reservoir, turbidity at the subsurface were 0 NTU but at 15 m depth, it ranged from 19.5-105.4 NTU. BOD5 were higher at 15 m and 30 m than 0.5 m depth. There was some improvement of water quality for stations in the reservoir compared to the previous study, especially in terms of pH and DO, but turbidity was still high at deeper regions. Stations in the Murum River and its downstream showed extremely high turbidity attributed to the construction of the Murum Dam. Thus, the river was not suitable for sensitive aquatic organisms.

Metadata

Item Type: Article
Creators:
Creators
Email / ID Num.
Lee, Nyanti
UNSPECIFIED
Ling, Teck-Yee
UNSPECIFIED
Muan, Theresa
UNSPECIFIED
Subjects: T Technology > TC Hydraulic engineering. Ocean engineering > Water resources development > Malaysia
T Technology > TC Hydraulic engineering. Ocean engineering > Dams. Barrages
T Technology > TD Environmental technology. Sanitary engineering > Water supply for domestic and industrial purposes > Qualities of water. Water quality
Divisions: Universiti Teknologi MARA, Pulau Pinang
Journal or Publication Title: Esteem Academic Journal
ISSN: 1675-7939
Volume: 11
Number: 1
Page Range: pp. 81-88
Keywords: Murum Rive, dam construction, dam water quality, dissolved oxygen, turbidity
Date: 2015
URI: https://ir.uitm.edu.my/id/eprint/11990
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11990

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