Application of Geoinformatics to Assess Coastal Changes and Changing Trends at Sirinat National Park, Phuket
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Abstract
The coastal area of Sirinat National Park in Phuket Province has undergone continuous changes in recent years, impacting the coastal ecosystem. This study employed Geographic Information Systems (GIS) to analyze coastline changes from 2017 to 2024 using the Normalized Difference Vegetation Index (NDVI) and the Digital Shoreline Analysis System (DSAS). These tools were used to assess shoreline width, determine rates of coastal change, and forecast future trends using simple linear regression. The results showed that the average shoreline width between 2017 and 2024 was 112.40 meters, with an average coastal change rate of -1.07 meters per year. At specific locations such as Nai Yang Beach, Mai Khao Beach, and Sai Kaew Beach, the rates of change were -0.59, -0.50, and -2.87 meters per year, respectively, indicating relatively stable conditions. Forecasts for 2029 and 2034 predict average shoreline widths of 106.39 meters and 102.86 meters, respectively, with projected rates of change from 2017 to 2029 and 2017 to 2034 being -1.00and -0.92 meters per year. These findings can assist government agencies and other stakeholders in developing appropriate coastal land-use policies, including zoning and infrastructure planning. Additionally, the results can be used to raise public awareness in at-risk areas and promote community participation in systematic coastal management.
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References
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