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Chernobyl Revisited Changes 23 years after
the Chernobyl Nuclear DisasterShu Tao
Yale School of Forestry & Environmental Studies
Chernobyl exclusion zone(original and present day)
Chernobyl Nuclear Power Plant
Forest
Pripyat
Images : Landsat 5
1986/04/29
Subset
Cloud MaskBand Math: Reflectance >0.19, Brightness temperature <282
1985/04/26 1986/04/29 2009/04/29
1985/04/26 RGB-321 1986/04/29 RGB-321
1985/04/26Before the Disaster
1986/04/293 Days Post Disaster
Brightness Temperature
Cooling Pond
NuclearPower Plant
NDVI1986/04/29 2009/04/29
NDVI ChangeRed – 1986Green – 2009
• Mean NDVI• 1986 0.196473• 2009 0.212662
Supervised Classification
Maximum Likelihood (Supervised & Cleaned)
1986/04/29 2009/04/29
Class Change Statistics
Constructions -> 55%-> WetlandsBright vegetation -> 72% -> Bare Soil
Class Change - ConiferousRed – 1986Green – 2009
Cooling Pond
Nuclear Power Plant Pripyat
Conclusions
• 1) Landsat5 helped to confirm the Chernobyl Nuclear Disaster
• 2) Urban area keeps strikingly similar
• 3) Forest area is generally expanding but with
deforestation in some area
Thanks!
Questions?