Movement Study of Radioactive Substances in Soil Water, Groundwater and Mountain Stream Water
From June 2011 to December 2016   The Ministry of Education, Culture, Sports, Science and Technology, and the Secretariat of the Nuclear Regulation Authority

This survey was conducted in order to ascertain the mechanism of outflow of radioactive substances from forest watersheds quantitatively. The analysis results of radioactive cesiu...
  1. This survey was conducted in order to ascertain the mechanism of outflow of radioactive substances from forest watersheds quantitatively.
  2. The analysis results of radioactive cesium in suspended matter or coarse organic matter show radiation (Bq) per unit dry weight (kg) , and dissolved radioactive cesium show radiation (Bq) per unit water volume (L).
  3. Radioactivity concentrations, errors, and detection limit values show decay-compensated values from measurement to sampling.
  4. Regarding 134Cs and 137Cs, "ND" in the column "Radioactivity Concentration", "-" in the column "Error", and Detection limit values in the column "Detection limit": The peak of relevant nuclide was not clearly detected, or calculated radioactivity concentration was equal to or below 0.0. Reference value in the column "Radioactivity Concentration" and Detection limit in the column "Detection limit": The peak of the relevant nuclide was detected even though the calculated radioactivity concentration was below detection limit.
Publicly available data collected from the website of the relevant organizations and converted into CSV, XML, and KML formats that were easy to use.

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