Detection of mainland Kedah’s shoreline changes (2013-2020); a case study
Shoreline erosion and accretion are natural processes that involve the gradual change in the shape and position of coastlines due to the movement of water, sediment, and geological factors. These processes have significant implications for coastal environments, ecosystems, and human activities. T...
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| Main Authors: | , , , , |
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| Format: | Conference or Workshop Item |
| Language: | English |
| Published: |
2023
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| Subjects: | |
| Online Access: | http://eprints.uthm.edu.my/11434/1/P16858_b2b4d70a8ff43af3a97f416d36badf9c%201.pdf http://eprints.uthm.edu.my/11434/ http://10.1088/1755-1315/1347/1/012017 |
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| Summary: | Shoreline erosion and accretion are natural processes that involve the gradual change
in the shape and position of coastlines due to the movement of water, sediment, and geological
factors. These processes have significant implications for coastal environments, ecosystems, and
human activities. Therefore, it is essential to frequently assess the shoreline changes for effective
coastal management, sustainable development, and safeguarding valuable ecosystems. In the
present study, shoreline condition along mainland Kedah (109 km) was investigated through
remote sensing and geographical information system (GIS) techniques. The assessment was
performed over the period of 7 years (2013 and 2020) by analysing the satellite images captured
by Landsat-8 satellite Operational Land Imager (OLI) at 15 m resolution. Preprocessing was
established by performing image geometric correction and registration. Next, the Support Vector
Machines (SVMs) toolbox was used for image classification to define the water and non-water
fields. Later, the shoreline was extracted from the classified images and overlaid in a geodetic
base in ArcGIS software to detect shoreline changes. The results showed that the majority of
mainland Kedah’s shoreline did not experience extensive erosion or accretion at which 54% of
the shoreline (58.8 km) was found to be stable. Erosion was observed at 6 locations with a total
length of 10.1 km (9% of the total shoreline length) which was mainly concentrated in the nonprotected
areas. On the other hand, shoreline accretion was observed at 19 locations with a total
length of 40.1 km (37% of the total length). It is worth highlighting that the erosion areas were
concentrated in the southern part of the coastline, while the accretion areas were distributed
between the middle part and the north side of mainland Kedah’s shoreline |
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