Do tides affect water quality in the upper phreatic zone of a small oceanic island, Sipadan Island, Malaysia? |
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| Authors: | M H Abdullah M B Mokhtar S H J Tahir A B T Awaluddin |
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| Institution: | (1) School of Science and Technology, Universiti Malaysia Sabah, Locked Bag No. 2073, 88999 Kota Kinabalu, Sabah, Malaysia, MY;(2) Faculty of Science and Natural Resources, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor D.E., Malaysia, MY |
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| Abstract: | Sipadan Island is a small oceanic island with limited storage of fresh groundwater. A study was carried out to determine
the effect of tidal change on the groundwater quality of such an island using temperature, dissolved oxygen content, conductivity,
salinity, and pH values as indicators. Overall, the results indicated that the groundwater quality changes with tides, but
the trends of fluctuation differs between the observed parameters. It was found that the percentages of changes during the
period of study were 0.8% (temperature), 53% (dissolved oxygen), 61% (conductivity), 58% (salinity), and 1.7% (pH) at the
centre of the island; and 0.9% (temperature), 33% (dissolved oxygen), 40% (conductivity), 42% (salinity), and 9% (pH) at a
station 120 m from the coast, based on 2.9-m and 2.8-m tidal ranges at each station.
Received: 5 July 1995 · Accepted: 6 November 1995 |
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| Keywords: | Water quality Tidal change Upper phreatic zone Oceanic island |
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