A Preliminary Study of the Distribution of Nitrogen Compounds in Tasik Kenyir, Malaysia

Suratman, Suhaimi; Bedurus, Edmand Andrew; Seng, Tan Hock

doi:10.13005/ojc/330332

Cited by 4 publications

(3 citation statements)

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“…Previous studies have shown that aquaculture activities deteriorated the water quality of the reservoir (Ling et al, 2012;Nyanti et al, 2012b: Ling et al, 2013. On the other hand, Tasik Kenyir in Terengganu, which was mainly designed for hydroelectric power generation and flood control purposes, has been successfully developed for eco-tourism activities, yet the concentrations of dissolved inorganic phosphorus and silicon were still classified as Class I according to National Water Quality Standards (NWQS) in Malaysia (Suratman et al, 2015). Due to the environmental concerns from existing anthropogenic activities and the potential future developments of the Bakun reservoir, this study aimed to determine its nutrient level that could serve as baseline data for future evaluations of the impacts of increased anthropogenic activities.…”

Section: Introductionmentioning

confidence: 99%

Nutrient Level of a Young Tropical Hydroelectric Dam Reservoir in Sarawak, Malaysia

Ling¹,

Gerunsin²,

Soo³

et al. 2018

BJRST

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Monitoring the nutrient level of a reservoir is crucial as excess nutrients can lead to hypoxia and fish kills in the reservoir. Hence, this study was carried out to examine the nutrient level of the Bakun reservoir, which is a newly built hydroelectric reservoir in Sarawak, Malaysia. Water samples were taken at five stations in the reservoir at three different depths (surface layer, 10 m, and 20 m) in November 2013. The present study demonstrated that Bakun reservoir contained low nitrite-nitrogen (≈ 0.005 mg/L) and nitrate-nitrogen (≈ 0.005 mg/L) concentrations but high five-day biochemical oxygen demand (≈ 4.73 mg/L) and organic Kjeldahl nitrogen (≈ 0.16 mg/L) concentrations indicating that organic pollution occurred in the reservoir. On the other hand, a mean total phosphorus concentration of 98.3 μg/L in the Bakun reservoir complied with the 200 μg/L standard value of Class II according to National Water Quality Standards in Malaysia. The nutrient level in the Bakun reservoir differed according to sampling stations and depths. Samplings stations located at Murum River downstream of the Murum dam construction site showed peak value of turbidity (182 FNU) and organic Kjeldahl nitrogen (0.45 mg/L) particularly at deeper water column. Batang Balui and Linau River were observed with higher five-day biochemical oxygen demand (> 6 mg/L) compared to other stations. Station near to the Bakun hydroelectric dam contained relatively high nitrite-nitrogen and total phosphorus concentrations but low nitrate-nitrogen and organic Kjeldahl nitrogen concentrations. Anthropogenic activities such as floating house and Murum dam construction have influenced the nutrients level in the reservoir. Keywords : Bakun hydroelectric reservoir, dam construction, nitrogen, phosphorus, turbidity

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Section: Introductionmentioning

confidence: 99%

Nutrient Level of a Young Tropical Hydroelectric Dam Reservoir in Sarawak, Malaysia

Ling¹,

Gerunsin²,

Soo³

et al. 2018

BJRST

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“…The decay of algae and dead trees in the lake may also contribute to the heavy metal levels in the bottom water of Lake Kenyir. A previous study by Suratman et al, 19 also observed the death of algae and trees that had sunk to the bottom of the lake and remained there, as there was thermal stratification downward in the lake and a hypolimnion layer was found at a depth of 30 m in the lake. Thus, this condition can explain why the concentration of particulate heavy metals was higher in the bottom water of the present study.…”

Section: Fig 5 Concentrations Of Particulate Heavy Metals For Vertical Distribution In Lake Kenyirmentioning

confidence: 80%

“…Lake Kenyir is a popular tourist destination for nature and adventure lovers, and botanists and zoologists as it has a variety of flora, fauna and freshwater fish 2 . As Lake Kenyir has been successfully developed as a tourist destination, there are many water sport activities available such as kayaking, canoeing, boating and rafting and several houseboats are built around the lake, which provide sleep-on-board accommodation for tourists 3 .…”

Section: Introductionmentioning

confidence: 99%

Distribution of Selected Dissolved and Particulate Heavy Metals in Lake Kenyir, Malaysia

2021

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This study was conducted to determine the concentration and possible sources of dissolved and particulate heavy metals in Lake Kenyir, Terengganu, Malaysia. The heavy metals studied included Cd, Fe, Pb, Zn and Cu. The findings indicated that the mean concentrations found in the dissolved form for surface waters were in decreasing order of Fe>Zn>Pb~Cu>Cd. A similar trend was also recorded for the particulate form i.e., Fe>Zn>Pb~Cu>Cd. In terms of vertical distribution, most of the heavy metals showed a trend of increasing concentrations from the surface to the bottom waters. The main sources of heavy metals were from anthropogenic activities such as discharge of untreated sewage, surface runoff and boat activity. However, the levels of dissolved heavy metals were still lower compared to other study areas in Malaysia. The dissolved heavy metal concentrations were equivalent with Class II based on the National Water Quality Standard for Malaysia.

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Sustainable management of water demand using fuzzy inference system: a case study of Kenyir Lake, Malaysia

Azlan

Malek

Zolkepli

et al. 2021

Environ Sci Pollut Res

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A Preliminary Study of the Distribution of Nitrogen Compounds in Tasik Kenyir, Malaysia

Cited by 4 publications

References 0 publications

Nutrient Level of a Young Tropical Hydroelectric Dam Reservoir in Sarawak, Malaysia

Nutrient Level of a Young Tropical Hydroelectric Dam Reservoir in Sarawak, Malaysia

Distribution of Selected Dissolved and Particulate Heavy Metals in Lake Kenyir, Malaysia

Sustainable management of water demand using fuzzy inference system: a case study of Kenyir Lake, Malaysia

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