Coastal Erosion Projection under Sea Level Rise: A Case Study of Chalatat Beach, Songkhla, Thailand

Abstract

Climate change has significantly contributed to rising sea levels, directly impacting coastal erosion. This study evaluates the effects of sea level rise on coastal retreat using the Bruun Rule under four climate change scenarios: best-case, good, moderate, and worst-case scenarios. The study focuses on Chalatat Beach, a vital tourist destination in Songkhla, Thailand. The findings indicate that by 2050, Chalatat Beach may experience shoreline retreat ranging from -10.64 to -12.87 meters, leading to a loss of approximately -29.91 to -36.21 rai of beach area. By 2100, coastal erosion is projected to intensify, with shoreline retreat between -25.75 and -44.22 meters, corresponding to a beach area loss of -72.42 to -124.37 rai. The loss of coastal land not only affects ecosystems and tourism but also has significant socioeconomic impacts on local communities. This study highlights the importance of assessing coastal erosion trends under different climate scenarios to support future planning and the development of adaptive management strategies.