2023 Volume 79 Issue 18 Article ID: 23-18021
Nusa Dua and Tanjung Benoa Beaches extend along the east coast of Bukit Peninsula located in the south part of Bali Island, Indonesia. On these beaches, beach erosion has occurred due to the spatial imbalance of northward longshore sand transport. Satellite images of Nusa Dua Beach show that sand transport through the opening behind an island occurred, resulting in erosion in the south part of the island. On the other hand, on Tanjung Benoa Beach, northward longshore sand transport was blocked by groins and the beach was eroded due to the shortage in sand supply. To consider the shore protection of these coasts, UAV images of the coasts were taken on 24 March 2021 and field observation was carried out at Nusa Dua and Tanjung Benoa Beaches on 7 September 2022. Appropriate measures against beach erosion were considered to be sand bypassing and sand back pass, respectively, instead of the selection of hard measure.
