IDENTIFIKASI TUMPAHAN MINYAK MENGGUNAKAN CITRA SYNTHETIC APERTURE RADAR (SAR) SENTINEL 1-A DI PERAIRAN CILACAP

• Main Author: Satria Mulya, Ferdian
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/45353
• Institution: Institut Teknologi Bandung

Cilacap regency is an administrative area on the south coast of Java which has a central port in export and import activities. Busy traffic levels can increase the risk of pollution, especially caused by oil. This resulted in Teluk Penyu area and its surrounding located in the administrative area of Cilacap becomes vulnerable to pollution due to oil spill. Oil Spills can be identified using several methods, on of which is by processing satellite image data Synthetic Aperture Radar (SAR). The method used in research is to conduct identify oil spill with adaptive thresholding and visual inspection on Sentinel 1-A satellite image. The oil spill accidents in Teluk Penyu and in the south Nusakambangan Island on May 20, 2015 until May 25, 2015 became case study in this research. Based on Sentinel 1-A image data processing on May 19, 2015 and May 23, 2015, the backscattering value from the dark areas categorized as oil spill in accident in Cilacap Waters has value between -17,8 dB to -22,2 dB. The Area of the oil spill on May 19, 2015 estimated 1,02 km2 while on May 23, 2015 it expanded to 3,70 km2. Oceanographic factors such as wind, tidal, and ocean currents can affect the spread of oil spills. Wind speed during an oil spill has a speed of 5,72 m/s from the southest so as to move the oil spill in the same direction. Tidal type in Cilacap waters is a mixed semidiurnal so as to accelerate the spread of oil spills. The movement and spread of oil spills in Cilacap waters is affected by tidal and wind currents. Tidal currents move the oil spill to the northwest during high tide while the low tide oil spill is moving to the southeast.