Contaminated surfaces
The surface distribution of the degree of contamination in soil (expressed in kilobecquerels of cesium-137 per square meter) varies greatly from one part of Europe to another. In France, over 52% of the country received less than 1 kBq/m2 and contaminations above 10 kBq / m 2 were the exception. Contaminations in Austria, because of topography and rainfall, were much higher. An extreme case was Belarus, highly exposed because of its proximity to Chernobyl.
IN2P3 (Source Atlas de Tchernobyl)