Entin Agustini Karjadi
The coastline is defined as the line that is the boundary between the land and the ocean. Waves, waves, and dynamic currents cause the movement of sediment on the beach which continuously changes the condition of the coastal bathymetry. Observation and determination of changes in coastlines caused by dynamic natural processes and human activities are the key to understanding the process of coastal evolution, the design of coastal protective structures, coastal area management, and future coastal area planning.
Monitoring the location of the location of the long-term coastline by means of measurement in-situ (example: RTK survey) will produce accurate data, but the availability of measurement data is very limited considering the In-situ survey requires human resources and costs very high. Meanwhile, the use of camera video can be done continuously at a lower cost (Holland et al., 1997), but requires a high point of view and power supply ( power supply), and camera video cannot be operated In locations where infrastructure facilities are not available. In the last three decades there have only been a few coastal locations in the world that are monitored continuously for a long period of time, so that the long -term data changes in the coastline of most beaches in the world are very limited or even not available.
Potential satellite observations Provides historical data sources of local and global scale coastline changes (Vost et al., 2019a) at a low cost that is suitable to be applied in Indonesia. Coastal identification using satellite data, especially satellite data that is generally available, is the best alternative to obtaining data on continuous coastline changes in the long run. Availability of Open Source Software such as Coastsat (Vos et al., 2019B) allows the use of general satellite images that are generally available ( publicly Available Satellite Imagery ) to identify and analyze coastline changes long term at low costs.
To get data on local and global scale coastline changes in the long term using satellite images and software that is generally available (publicly available).
This study produces historical data changes in coastline in the long run for Pesaren Beach which is ready to be used for modeling and analysis of the evolution of coastlines at that location.