RUN-OFF OF CAESIUM-137 AND STRONTIUM-90 FROM RIVERS

Journal Article · Sat Nov 16 04:00:00 EST 1963 · Nature

DOI:https://doi.org/10.1038/200668b0· OSTI ID:4135841

Yamagata, N; Matsuda, S; Kodaira, K

Measurements were made on the concentrations of Cs/sup 137/ and Sr/sup 90/ in the River Tonegawa and at Kiriu City in Japan. The concentrations in rain water were calculated by dividing the monthly deposits by the monthly rainfall. An attempt was made to evaluate the run-off of a radionuclide in terms of the cumulative deposition and the deposition rate on the basis of an expression of the general form: C = C/sub d/ + p/sub r/C/sub r/, where C is the concentration of a radionuclide in the river water ( mu mu C/l), C, is the concentration of the radionuclide in the rain water ( mu mu C/l) corrected for the evaporation (30% is assumed), p/sub r/ is a proportionality factor, and C/sub d/ is the concentration of the radionuclide in the river water that was derived from the cumulative deposition. The run-off by river of the ground deposits of Cs/sup 137/ and Sr/sup 90/ was estimated as 17.5 and 32 c, respectively, per annum on the basis of the mean concentrations (C/sub d/) and the total discharge of 5 x 10/sup 14/ l of river water in Japan. (P.C.H.)

• Research Organization: Inst. of Public Health, Tokyo
• Sponsoring Organization: USDOE
• NSA Number: NSA-18-004003
• OSTI ID: 4135841
• Journal Information: Nature, Journal Name: Nature Vol. Vol: 200
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

CESIUM 137
GEOLOGY AND MINERALOGY
HYDROLOGY
MEASURED VALUES
RADIOISOTOPES
RAIN
RIVERS
STRONTIUM 91
WATER