Yogyakarta coastal areas in Indonesia are marine resources that affect the socioeconomics such as local trade, international trade, marine catches, and tourist attractions. The existence of activities in the marine sector creates the potential for shoreline change. The detection of coastline change, such as abrasion and/or sedimentation, using remote sensing is considered as a very effective method because the shoreline is found as highly dynamic nature. This study analyses shoreline changes in Yogyakarta coastal areas from 2010 to 2019 using satellite imageries obtained from Google Earth Pro platform and the processing data using AutoCAD software. The average coastline changes occur 2.90 m of abrasion per year at Parangtritis Beach and 1.98 m of sedimentation per year at Krokoh Beach. The effort to prevent shoreline changes at Parangtritis shore areas is by constructing coastal protection structures. Further research is needed to determine soft and/or hard coastal protection structures.

Way Hawang Beach, one of coastal tourist attraction, located in Way Hawang Village, Maje, Kaur Regency, Bengkulu Province is suffering from erosion. The regular erosion speed is approximately 2 to 3 meters/year, taking the distance from Way Hawang coastline to West Sumatra Causeway which around 250 meters. Efforts to eradicate abrasion on Way Hawang Coast are mostly carried out using coastal protective structures. One of the breakwater structures that can reduce wave energy is geotextile tubes, which is a low-threshold breakwater structure. Geotextile tubes create a synthetic barrier along shorelines and beaches to help control erosion. Geotextile tubes placement plays an important role in the overall protection system performance. The geotextile tubes are simulated in the abrasion and accretion positions on the Way Hawang coast. The simulation results indicated that the position between abrasion and accretion are the most effective position to manage and to avoid erosion in Way Hawang coast’s area at Bengkulu Province.