Remote sensing presentation with case study
- 1. Distribution of Oil Spill off-shore Lebnon using Remote Sensing Keshav Chaurasia 072BEX423 072bex423.keshav@pcampus.edu.np Submit to: Nanda Bikram Adhikari Sir
- 2. 2 Contents ● Introduction ● Jiyeh Power Station Oil Spill Disaster ● Disaster Images ● ASTER Satellite ● Analysis ● Conclusions
- 3. 3 Introduction ● Oil and chemical spill in marine environment have widespread disaster ● Real-time oil spill detection and monitoring using high special and spectral resolution severely remote sensing images to predict spill oil location ● Build oil spill distribution map by using GIS ● Both aerial and satellite remote sensing are used by coastal states, this technique is also the dominant method of detection of oil slicks worldwide.
- 4. 4 Jiyeh Oil Spill Disaster ● Jiyeh Power Station Lebanese coast eastern Mediterranean ● On July 13th 2006, Huge amount of oil spill (10 million gallon – 15000 tonnes) after bombed by Israel Air Force ● 10 km wide slick oil covered 170 km coastline ● Threatened Turkey and Cyprus ● The slick killed fish, threatened the habitat of endangered green sea turtles, and potentially increased the risk of cancer ● Impacted Mediterranean sea as a whole which is the most important ecosystems in the world ● Israeli jets deterred firemen from putting out the fire at the storage units, which continued for 10 days, and the Israeli Navy blockade stopped Lebanese and foreign officials from surveying the damage of the spill.
- 5. 5 Disaster Images NASA Image of spill taken on August 10, 2006. Oil slick in darker blue The oil-spillage caused by the Jiyeh bombings in mid July, had by 29 July coated the whole water surface in Byblos harbor, some 60 km north of Jiyeh. Workers clean up oil spill in 2006
- 6. 6 Disaster Images Oil from the bombed power plant of Jiyeh contaminating the beaches of Beirut Oil slick and oiled debris trapped in a port Coastline after the disaster
- 7. 7 Advanced Space-borne Thermal Emission and Reflection Radiometer● ASTER satellite sensor is one of the five state-of-the-art instrument sensor systems on-board Terra a satellite launched on December 18, 1999 at Vandenberg Air Force Base, California, USA. ● ASTER is a 15 meter, 14 band multi-spectral resolution instrument with short retrieval time. It can be used for change detection, calibration, validation, and land surface studies. ● ASTER satellite image data is expected to contribute to a wide array of global change-related application areas, including vegetation and ecosystem dynamics, hazard monitoring, geology and soils, land surface climatology, hydrology, land cover change, and the generation of digital elevation models (DEMs). ● ASTER high-resolution satellite capable of producing stereo imagery for creating detailed digital terrain models (DTMs).
- 8. 8 The ASTER subsystems ● VNIR (Visible Near Infrared), a backward looking telescope which is only used to acquire a stereo pair image ● SWIR (ShortWave Infrared), a single fixed aspheric refracting telescope ● TIR(Thermal Infrared) The ASTER Satellite Image provided by NASA
- 9. 9 ASTER Specification Launch Date 18th December 1999 at Vandenberg Air Force Base California USA Equator Crossing 10:30 AM(north to south) Orbit 705 km altitude, sun synchronous Orbit Inclination 98.3 degrees from the equator Orbit Period 98.88 minutes Ground Tracking Repeat Cycle 16 days Resolution 15 to 90 meters
- 10. 10 ASTER Subsystem Specifications Instrument VNIR SWIR TIR Bands 1-3 4-9 10-14 Spatial Resolution 15m 30m 90m Swath Width 60km 60km 60km Cross Track Pointing +- 318km (+- 24 deg) +- 116km (+-8.55 deg) +- 116km (+-8.55 deg) Quantization (bits) 8 8 12
- 11. 11 Analysis ● Image taken after 25 days of aftermath ● Classified ASTER image showing different densities of the spread materials as ● well as proposing another source of release south to Jiyeh station . after Lebanese ● National Council for Scientific Research (CNRSL)2006.
- 12. 12 Comparison with other satellites Three types of satellite images showing the change in the floating materials (including fuel-oil) along the Lebanese coast. Lebanese National Council for Scientific Research (CNRSL). 2004.
- 13. 13 Before and After MODIS (Moderate Resolution Imaging Spectroradiometer )Image MODIS images before (July 2005) and after (July 2006) the bombing of Jiyeh station .Lebanese National Council for Scientific Research (CNRSL)
- 14. 14 Conclusions ● Remote sensing provide Real – time oil spill detection and monitoring using high special and spectral resolution such as – (1) flexible overviews of survey areas with regard to marine pollution and sea traffic – (2) quick assessments of oil spill sites – (3) deterrence of potential polluters ● GIS can qualitatively and quantitatively characterize the spatial and temporal distribution of oil spills at sea and analyze the environmental conditions of the area
- 15. 15 Thank you!