The Fukushima Daiichi nuclear power plant accident in Japan triggered by a magnitude 9.0 earthquake and resulting tsunami on March 11, 2011 caused the month-long discharge of radioactive materials into the atmosphere. It is urgent to assess the radiological dose to the public resulting from this release, using both environmental monitoring data and computer simulation based on atmospheric dispe...

We have quantified the caesium-137 in surface waters and sediments in both the Portuguese and the Spanish sections of the Tagus River over six years. This river has its source in Spain, and of its 1100 km length about 230 km are in Portugal, 43 km serving as a natural frontier between the two countries. In the two regions under study the water flow is completely regulated by a chain of dams. Th...