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Journal of Environmental Biology

pISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP

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    Abstract - Issue Sep 2016, 37 (5)                                     Back

nstantaneous and historical temperature effects on a-pinene

Bera Lake water quality, past and present situation


Mohammadreza Gharibreza1* and Muhammed Aqeel Ashraf2,3

1Research, Education & Extension Organization (AREEO), Soil Conservation and Watershed Management Research Institute, Tehran, 13445-1136, Iran

2Faculty of Science and Natural Resources, University Malaysia Sabah 88400 Kota Kinabalu, Sabah, Malaysia

3Department of Environmental Science and Engineering, School of Environmental Studies, China University of Geosciences, 430074 Wuhan, P. R. China

*Corresponding Author E-mail:


 Publication Data

Paper received:

21 February 2016


Revised received:

27 April 2016


Re-revised received:

5 May 2016



23 June 2016



Bera Lake is the largest natural fresh water reservoir in Malaysia. It has vital environmental and ecological importance for human and wild life. Nevertheless, water quality of this lake has been degraded during the last few decades due to land development projects at catchment area. Therefore, a comprehensive water quality assessment of Bera Lake was implemented in order to compare current water quality with the implementation of land development projects. In situ water quality surveying was implemented using calibrated full option Hydrolab DS 5. Eleven parameters viz., temperature, depth of sampling, salinity, Turbidity, total dried solid, pH, NH4+, NO3-, Cl-, saturation percentage of dissolved oxygen, specific conductivity were recorded in fifty one stations at 0.2h, 0.5h, and 0.8h depth. National Water Quality Standards for Malaysia (NWQS) and Water Quality were used to evaluate Bera Lake quality based on previous and resultant data. Vertical water quality analysis revealed a clear stratification in Bera Lake water profile in terms of temperature, dissolved oxygen, chloride (Cl-), nitrate (NO3-), pH and specific conductivity (EC) parameters. Results clearly demonstrate the important role of land use changes since 1972 in the physico-chemical condition of water quality at Bera Lake. Classifications of water quality before and after land development project were calculated as class II and class V, respectively. A long-term and comprehensive monitoring of water quality assessment is recommended in order to reach plan of sustainable water resources use with conservation approach.   



 Key words

Assessment, Bera lake, Land use changes, Stratification, Water quality



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