A study of coastal changes in Khanom District using the Crenulated Bay Shape Model and its relationship with environmental factors

Abstract

This study focuses on the coastal changes in Khanom District, Nakhon Si Thammarat Province, which are influenced by environmental factors such as wind direction, ocean currents, and sediment deposition. The Crenulated Bay Shape Model was employed to analyze shoreline changes using satellite images. Based on satellite imagery from 2014–2021 for Kwang Pao Beach, from 2015–2021 for Thong Not Bay, and from 2015–2017, 2019, and 2021 for the Khanom Power Plant Beach, the study found that Thong Not Bay is in the process of adjusting toward a stable equilibrium. Kwang Pao Beach has experienced both coastal erosion and sediment deposition, indicating a state of dynamic equilibrium. In contrast, the Khanom Power Plant Beach is considered an unstable beach.