engleski

Airborne hyperspectral detection and geographical mapping of oil slicks in the sea

The potential contamination of the Adriatic Sea by the oil and other pollutants is a strategic threat to Croatia, due to the dependence of the national economy on the tourism. While the Adriatic is a narrow sea, available time for the early detection and the reaction is only several hours, therefore the aerial reconnaissance and surveillance is the most suitable solution. The Synthetic Aperture Radar (SAR) and ultra violet (UV) sensors are mostly used for detection of the oil spills, although they are not available at the time of the calamitous event, especially if the required reaction time is short. The hyper spectral remote sensing enables efficient detection of the oil spills, and this technology is promising and suitable for Croatia. In Croatia is available the hyper spectral line scanner, that was used in the airborne acquisition of the ground reflectivity. The airborne system was developed for the aerial sampling of the hyper spectral reflectivity data, while the platform was the helicopter Bell-206, in 2002 and 2003. The upgrading into the airborne imaging system for the detection of the oil spills and the geographical mapping is under way. The concept of this project is presented for the first time. For this project the support was required from Croatian Ministry of science, education and sports (technology program) and from the NATO (program Science for Peace). Besides the monitoring of the unexpected Adriatic Sea eco – accidents or catastrophes, the monitoring of the open fresh waters is foreseen too. In the frame of this project is foreseen the upgrading of the existing airborne hyperspectral line scanning system into the imaging system, development of the standard operating procedures (SOPs), training in office and on training on the job of the crews for the aerial reconnaissance and surveillance system based on piloted fixed wings airplane and/or the helicopter. The upgraded system will provide detection of the oil spill, the following the movement of the spill, enable approval of the cleaning, enable assessment of the damage of the beach, provide situational awareness in near real time. It is important to note that it will provide objective, accurate and reliable geographically mapped data about history of the contamination, aimed for legal procedures. In the paper we also present use of the V9 ImSpector hyper spectral line scanner for the visible and a near infrared wavelengths, that was aimed to sample reflectivity of the ground surface by the airborne remote sensing and the preliminary results of the research of the spectral reflectivity characteristics of the oil and sea water.

oil pollutants; hyperspectral; line scanner; spectral reflectivity characteristics; geographically mapped data

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