Prof. Viateheslav I. Kharuk Profile

Prof. Viateheslav I. Kharuk

Head of Forest Biophysics Lab at Sukachev Forestry Institute

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Proceedings Article | 16 June 2003 Paper

Landsat-7 in evaluation of oilfield exploitation impacts on the south Evenkiya larch dominant communities

Viacheslav Kharuk, Kenneth Ranson, Sergey Im

Proceedings Volume 4897, (2003) https://doi.org/10.1117/12.466865

KEYWORDS: Earth observing sensors, Landsat, Reconnaissance, Vegetation, Composites, Satellites, Roads, Remote sensing, Mid-IR, Error analysis

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This paper study considers the effects of oil exploration and development in the oilfields of Evenkiya, Central Siberia (60°30^’N/96°30^’E). The drilling in this area was initiated in 1970, and the first oil was extracted in 1977. Image data from the US’ Landsat-7, the Russian “Resours”, and the European ERS-2 remote sensing satellites were analyzed. The information value of the Landsat-7 channels was evaluated. In particular, the fresh oil drilling sites effectively differ from old ones in the third (0.63-0.69 µm) and fourth (0.75-0.90 µm) channels. Recently burned areas are detectable in the middle IR (1.55-1.75, 2.08-2.35 µm). The classification accuracy depends on the number of channels used, but does not improve greatly using more than 4 or 5 channels. Landsat-7 scenes enable the detection of patterns for parallel strips (5-10 m in width) of cut forest, the first sign of the oil reconnaissance. Alongside the direct impacts of oil-exploitation, fire frequency was increased. The “big” fires (area>200 ha) caused ~90% of the total damage, but only accounted for 10% of total firescars. The area of human-caused impact is ~20% of territory, which is ~2.5 higher than average for known oil development areas within the Landsat scene. The ERS-2 scenes were found to be effective for mapping fresh drilling sites only. The comparative analysis of “Resours” KFA-1000 camera scene (June 1984) and Landsat-7 (October 1999) showed that during this period the number of oilrigs increased nearly 5 times. Generally, the Landsat-7 data are effective for early detection of the anthropogenic impact on the Siberian larch-dominated communities.

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