Study on shoreline changes using Landsat imagery in Sangsit Region, Bali Province

Abstract

This study was conducted to observe the dynamic of shoreline changes in Sangsit Region, Bali Province using multi-temporal remote sensing datasets. The remote sensing data were acquired from several Landsat images in the period of 2000-2019 (20 years) with 30-meter spatial resolution. Digital Shoreline Analysis System (DSAS) method was used to analyse data images to determine the shoreline changes. Prior to the analysis, the images were corrected by ground check data. It revealed that the shoreline changes has occur in Sangsit Region for period of 20 years (2000-2019). The results obtained indicate that there is a change in shoreline with mild accretion to less extreme abrasion categories which occurred in the Sangsit Region in that period. From 2000-2005 it shows an accretion of 221.03 m which is categorized as mild accretion and from 2005-2019 the shoreline changes that occur is only an abrasion its categorized as mild to less extreme abrasion. The highest abrasion occurred in the period of 2010-2015 which the abrasion is around 49.65 m.

Coastline Change using Time Series Satellite Images in the North Coast of Java: Study Case Indramayu Regency, West Java, Indonesia

“…Based on previous study [5], coastline changes were analysed from 1989-2019, using Landsat 5 and Landsat 8 satellite imagery data, using the BILKO method and the overlay method. The results were for the value of the abrasion rate in 1989-2019 covering 2,127 ha and accretion covering an area of 746 ha.…”

“…Usage of remote sensing data is very helpful to determine coastline changes, we can calculate the change by temporal resolution mean that we will get the information from other years before and we can study large area using this method. The use of satellite images with medium spatial resolution such as Landsat is suitable for spatial dynamics monitoring of coastline [5].…”