Spatial Data Integration for Monitoring Shoreline Changes in the Coastal Area using Hard Engineering Structures: A Case Study of Pattani Province

Abstract

This paper focuses on comparing the shoreline change rates in coastal areas, the impact occurred after the construction of coastal defenses hard engineering structures in the coastal of Pattani province during 1975 to 2011. The methodology is based on the application of remote sensing data in multispectral is during recording in 1975 to 2011, an algorithm that ensures accurate image geometric registration and improvement techniques on the edge of the image segmentation, Sobel edges detection and Panshaped for sub-pixel shoreline extraction. The processing and analysis of shoreline change using Arcview 3.3 application with extension plugins DSAS. Rate of shoreline change was demarcated based on shoreline change envelope (SCE) and End Point Rate (EPR). The results found that have during the before coastal structure erosion rate of 3.70 m/yr, after the structure erosion rate of 3.02 m/yr. Groyne structure prevent coastal erosion was less than the tripod seawall and revetment structure, and affect the erosion process to the area around the structure, especially in the west side, the erosion rate of 5.59 m/yr. While the use of a tripod seawall to prevent coastal erosion. The remains of the coastline and the material structure still works great. Using the revetment structure is slow erosion, but the rock dumps structure is damaged easily.
The result of the study indicates that shore perpendicular structure, if construction a continuous or overlay structure built parallel to the coast is accelerate rate of change of the coastline and surrounding structures and the more side effects of severe erosion rates. Application of the remote sensing technique to extraction the shoreline and focus on the segmentation, Sobel edges detection and panshaped with color multispectral image information helps to easier and more accurate interpret for visual interpretation, Then techniques are very useful for impact assessment and monitoring coastal changes of spatial dynamics effectively.