IDENTIFICATION OF MARINE DEBRIS AND ITS CHANGES IN AREA USING UNMANNED AERIAL VEHICLE (UAV) IN CIREBON COASTAL AREA, INDONESIA

• Main Author: Dyan Yohanlis, Aulia
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/61953
• Institution: Institut Teknologi Bandung

Coastal debris can be a significant problem when it enters the ocean, such as ingestion or entanglement of marine life. Cirebon Coast is one of the coasts experiencing debris problems because of its position as a domestic and international trade route. In determining effective debris cleaning methods and improving marine debris management in Cirebon Coast, some basic information about debris is needed, especially on the coast which is a transition zone for land debris into marine debris. The purpose of this study is to identify the dominant marine debris type and analyze the effect of tides on the characteristics of debris and its change in area on the Cirebon Coast. The monitoring of debris on the beach in this study used orthophoto obtained with an Unmanned Aerial Vehicle (UAV) with DJI Phantom 4 Pro type which then validated using aerial photography and the debris transect method. The change in debris area analysis was carried out by digitizing orthophoto manually using ArcGIS software. The results show that the use of UAV is effective in identifying macro-sized debris at 10:00 and 16:00 perpendicular to the earth's surface (90º). The dominant marine debris types in the Cirebon Coast are plastic debris and Styrofoam. In accordance with the validation from aerial photographs which showed that plastic and styrofoam was easily detected by drones. In addition, the validation results of the debris transect method also shows that the dominant debris in the Cirebon Coast is 607 pieces of soft plastic in an area of 50 m2. Changes in tidal height affect the area of debris and can move debris up to 50 cm from its previous position in 2 hours in Karang Anom and 25 cm in 7 hours in Rawa Urip. The debris in Rawa Urip is less in number but large in size, while the debris in Karang Anom is more in number but small in size (consisting of pieces of debris). The debris area at Rawa Urip Beach when slack before flood tide (55.53 m2) is larger than the area when slack before ebb tide (52.71 m2). The debris area at Karang Anom Beach at low tide (129.89 m2) is larger than when slack before ebb tide (75.79 m2). The highest debris area percentage on Karang Anom Beach is located in Area A with an area of 30.22% at slack before ebb tide and 43.66% at ebb tide. The highest debris area percentage at Rawa Urip Beach is located in Area G with an area of 22.79% when slack before ebb tide and 24% slack before flood tide. The largest rate of change in debris area occurred in Area A, Karang Anom Beach, which was 15.11 m2/hour or around 362.64 m2 in 1 day. The smallest debris area rate occurred in Area F, Rawa Urip Beach, which was 0.008 m2/hour or about 0.19 m2 in 1 day. 2. Factors that affect the debris area on the Cirebon Coast include tidal height, sea water visibility, and the coast structure (coast slope and components).