OIL SPILL RESPONSE TECHNIQUES USING SAR AND MARINE WEATHER DATA: OIL SLICKS TRACKING

Abstract

This paper presents a technique for tracking the movement of oil slicks using SAR and marine weather data. The detected oil from the SAR image is used as input data for tracking model, and marine weather data is used as an external force to determine the displacement of oil slick. Forward and backward tracking are possible, and the results can be verified using satellite data at the end of tracking. The detected oil area is divided into a certain lattice and assumed to be oil particles, and used as input in the form of coordinate values. Marine weather data used in the tacking are wind and tidal current, and the movement vectors are calculated using the empirical equations that have been separated by northward and eastward vector components, U and V, respectively. Forward and backward tracking were performed using 4 SAR images observed at the time of the Hebei Spirit accident in 2017. Wind components were generated by AWS data around the observation area, and tidal current information was extracted from EFDC model data. The tracking results showed good reproducibility of the direction and distribution of oil movement. However, the movement trajectory in the southwest-northeast direction is not accurately simulated. This shows that additional simulations of the influence of oceanic weather components such as wind and ocean currents are needed. This result will contribute to increase the efficiency of maritime spill re determine the displacement of oil slick. Forward and backward tracking are possible, and the results can be verified using satellite data at the end of tracking. The detected oil area is divided into a certain lattice and assumed to be oil particles, and used as input in the form of coordinate values. Marine weather data used in the tacking are wind and tidal current, and the movement vectors are calculated using the empirical equations that have been separated by northward and eastward vector components, U and V, respectively. Forward and backward tracking were performed using 4 SAR images observed at the time of the Hebei Spirit accident in 2017. Wind components were generated by AWS data around the observation area, and tidal current information was extracted from EFDC model data. The tracking results showed good reproducibility of the direction and distribution of oil movement. However, the movement trajectory in the southwest-northeast direction is not accurately simulated. This shows that additional simulations of the influence of oceanic weather components such as wind and ocean currents are needed. This result will contribute to increase the efficiency of maritime spill re