Groundwater flow system in the valley of Toluca, Mexico: an assay of natural radionuclide specific activities

Natural radionuclides and physicochemical parameters have been evaluated in groundwater samples from boreholes belonging to the drinking water supply system of the Toluca City, Mexico. The results obtained for radon and radium, together with the physicochemical parameters of the studied samples, ind...

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Bibliographic Details
Published in:Applied radiation and isotopes 1999-03, Vol.50 (3), p.589-598
Main Authors: Segovia, N, Tamez, E, Peña, P, Carrillo, J, Acosta, E, Armienta, M.A, Iturbe, J.L
Format: Article
Language:English
Subjects:
Flow system
Fresh Water - analysis
Groundwater 222Rn, 226Ra, 238U
Humans
Liquid scintillation, alpha spectrometry and flourometry techniques
Mexico
Physicochemical water analysis
Radioisotopes - analysis
Radium - analysis
Radon - analysis
Uranium - analysis
Water Pollutants, Radioactive - adverse effects
Water Pollutants, Radioactive - analysis
Water Supply - analysis
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Summary:Natural radionuclides and physicochemical parameters have been evaluated in groundwater samples from boreholes belonging to the drinking water supply system of the Toluca City, Mexico. The results obtained for radon and radium, together with the physicochemical parameters of the studied samples, indicate a fast and efficient recharge pattern. The presence of a local and a regional groundwater flows was also observed. The local flow belongs to shallower water, recognized by its low radon content and dissolved ions, as compared with the regional, deeper groundwater flow with a longer residence time.
ISSN:0969-8043
1872-9800
DOI:10.1016/S0969-8043(98)00086-4