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Poster Session 3
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Remote sensing of total suspended solids
in penang coastal waters, malaysia
The sediment concentration patterns are consistent with the local distribution pattern (Figure 3). Higher concentration areas are distributed near the river mouths and the shallow southern region of the channel. The plumes in the river mouths were created by river discharges. In the shallow water, the turbidity might be caused by bottom resuspension due to waves and wind actions. The concentration seems to be relatively lower in the deeper part of the sea. Based on the sea truth data as well as earlier reports (Din 1995), we are quite confident of the distribution shown. However, we are unable to establish the validity of the apparent higher concentration on the west coast of Penang Island because of the absence of sea truth data. Further sea truthing for the area will be done to confirm the values. The March TSS pattern was dominated by high concentration.
Figure 2 Regression results for TSS
(a)
(b)
Figure 3 Distribution of TSS on (a) 2 February 1999 and (b) 22 March 1999 (colour code: blue 0-50, green 55-100, yellow 100-150,orange 150-200, red >200 mg l-1)
Conclusion
With the present constraints of having only two scenes, the proposed model was found to provide a useful multi-date TM water quality calibration model for the Penang Strait. The accuracy of the sea truth data played a very important role in determining the reliability of the calibrated algorithm and the quality of the generated water quality maps. The feasibility of applying the present techniques for operational use has to be further validated. Therefore more data will be required for this verification analysis.
Acknowledgements
This project was carried out using the Malaysian Government IRPA grant no.08-02-05-6011. We would like to thank the technical staff and research officer who participated in this project. Thanks are extended to MACRES and USM for support and encouragement
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