Red tide detection using remotely sensed data: A case study of Sabah, Malaysia
A red tide (RT) is composed of harmful blooms or algae that could cause mass mortalities of marine life and lead to human intoxications or even death. Several red-tide events have been reported in Sabah since 1976. The latest event occurred in February and March 2000 near the coastal waters of Sip...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Universiti Kebangsaan Malaysia
2009
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| Subjects: | |
| Online Access: | http://eprints.utem.edu.my/id/eprint/32/ http://eprints.utem.edu.my/id/eprint/32/1/2009_redtides.pdf |
| _version_ | 1848886874167312384 |
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| author | Asmala, A. Noorazuan, H. Nordin , L. |
| author_facet | Asmala, A. Noorazuan, H. Nordin , L. |
| author_sort | Asmala, A. |
| building | UTeM Institutional Repository |
| collection | Online Access |
| description | A red tide (RT) is composed of harmful blooms or algae that could cause mass mortalities of marine life and
lead to human intoxications or even death. Several red-tide events have been reported in Sabah since 1976.
The latest event occurred in February and March 2000 near the coastal waters of Sipitang Bay. This article
examines the use of the RT image-processing algorithm through SPOT 4 satellite data application in
detecting toxic blooms which occurred on February 2000. Results from the classified image indicate that
SPOT 4 is capable of determining a possible red tide event quantitatively and spatially. It is estimated that
about 40 km2 of the classified image was affected by RT. The occurrence of red tide was due to an increase
of nitrate- and phosphorus- based nutrient loads discharge the aftermath of anthropogenically induced land
use and land cover change near Sipitang-Beaufort area. This research suggests further investigations with
detailed land cover information to demarcate inorganic sources, as well as a field survey of seawater quality
conditions. |
| first_indexed | 2025-11-15T19:45:25Z |
| format | Article |
| id | utem-32 |
| institution | Universiti Teknikal Malaysia Melaka |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T19:45:25Z |
| publishDate | 2009 |
| publisher | Universiti Kebangsaan Malaysia |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | utem-322021-09-19T15:06:20Z http://eprints.utem.edu.my/id/eprint/32/ Red tide detection using remotely sensed data: A case study of Sabah, Malaysia Asmala, A. Noorazuan, H. Nordin , L. GA Mathematical geography. Cartography A red tide (RT) is composed of harmful blooms or algae that could cause mass mortalities of marine life and lead to human intoxications or even death. Several red-tide events have been reported in Sabah since 1976. The latest event occurred in February and March 2000 near the coastal waters of Sipitang Bay. This article examines the use of the RT image-processing algorithm through SPOT 4 satellite data application in detecting toxic blooms which occurred on February 2000. Results from the classified image indicate that SPOT 4 is capable of determining a possible red tide event quantitatively and spatially. It is estimated that about 40 km2 of the classified image was affected by RT. The occurrence of red tide was due to an increase of nitrate- and phosphorus- based nutrient loads discharge the aftermath of anthropogenically induced land use and land cover change near Sipitang-Beaufort area. This research suggests further investigations with detailed land cover information to demarcate inorganic sources, as well as a field survey of seawater quality conditions. Universiti Kebangsaan Malaysia 2009 Article PeerReviewed text en http://eprints.utem.edu.my/id/eprint/32/1/2009_redtides.pdf Asmala, A. and Noorazuan, H. and Nordin , L. (2009) Red tide detection using remotely sensed data: A case study of Sabah, Malaysia. Geografia - Malaysian Journal of Society and Space , 5 (3). pp. 1-7. ISSN 2180-2491 http://www.ukm.my/geografia/v1/index.php?cont=d&item=1 |
| spellingShingle | GA Mathematical geography. Cartography Asmala, A. Noorazuan, H. Nordin , L. Red tide detection using remotely sensed data: A case study of Sabah, Malaysia |
| title | Red tide detection using remotely sensed data: A case study of Sabah, Malaysia |
| title_full | Red tide detection using remotely sensed data: A case study of Sabah, Malaysia |
| title_fullStr | Red tide detection using remotely sensed data: A case study of Sabah, Malaysia |
| title_full_unstemmed | Red tide detection using remotely sensed data: A case study of Sabah, Malaysia |
| title_short | Red tide detection using remotely sensed data: A case study of Sabah, Malaysia |
| title_sort | red tide detection using remotely sensed data: a case study of sabah, malaysia |
| topic | GA Mathematical geography. Cartography |
| url | http://eprints.utem.edu.my/id/eprint/32/ http://eprints.utem.edu.my/id/eprint/32/ http://eprints.utem.edu.my/id/eprint/32/1/2009_redtides.pdf |