The influence of seasonal changes on physico-chemical characteristics of seawater in Sepangar and Gaya Bays, Sabah

Tamrin Toha, (2008) The influence of seasonal changes on physico-chemical characteristics of seawater in Sepangar and Gaya Bays, Sabah. Masters thesis, Universiti Malaysia Sabah.

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Abstract

A study regarding the influence of seasonal changes on . physico-chemical characteristics of seawater was conducted in coastal area of Sepangar and Gaya Bays, Kota Kinabalu, Sabah. The objectives of study were to determine the physico-chemical characteristics of seawater (temperature, salinity, dissolved oxygen, pH, total suspended solid and nutrients) and the effect of seasonal changes and current on the distribution of those parameters. Sampling were conducted at eight stations during inter monsoon (March - May), Southwest monsoon (July - September) and Northeast monsoon (December - February) from 2006 to 2007. Temperature, DO, salinity and pH were measured in-situ using multi probe sensor (Hydrolab surveyor 4a). Current measurements were recorded using current meter (Aquadop Nortex). Total suspended solids and nutrients (ammonia, nitrite, nitrate and phosphate) were performed using Standard method as suggested by APHA and Parsons respectively. The results of study showed that salinity were ranged between 29.47 - 34.75 ppt which achieve its peak value during 1M season due to low precipitation, nitrate concentrations ranged between 0.15 - 202.41 µg/I and achieve its peak value during SW monsoon due to high precipitation. While, DO, pH, TSS, N02 and P04 were found relative higher during NE monsoon compared to other season which in range from 2.03 - 16.18 mg/l, 6.5 - 8.74, 0.20 - 298.0 mg/l, 0.07 - 46.43 µg/I and 0.04 - 156.25 µg/I respectively. Current circulation at the study area was influenced by local wind and tidal current. Total suspended solid, seawater temperature, ammonia and nitrite were higher during ebb current. The pH, nitrate-nitrogen and phosphate-phosphorus were higher during flood current. Whereas, dissolved oxygen and salinity did not show significant difference during ebb current and flood current.

Item Type:Thesis (Masters)
Uncontrolled Keywords:Physico-chemical, Seasonal, Current, Sepangar and Gaya Bays.
Subjects:?? GC100-103 ??
Divisions:SCHOOL > Borneo Marine Research Institute
ID Code:3763
Deposited By:IR Admin
Deposited On:29 May 2012 13:28
Last Modified:29 May 2012 13:28

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