The distribution of radon-222 in the ground water of the north-central Tucson basin and its relationship to the hydrogeology
AuthorSmith, Bruce D.
Radon -- Isotopes.
Groundwater -- Pollution -- Arizona -- Tucson Basin.
Hydrogeology -- Arizona -- Tucson Basin.
Committee ChairLong, Austin
MetadataShow full item record
PublisherThe University of Arizona.
RightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
AbstractA reconnaissance study of ²²²Rn concentrations in the ground water of the North-Central Tucson basin revealed a range of concentrations from 80 to 1400 pCi/L in wells, and 60 to 1260 pCi/L in domestic waters. Estimated degradation of Rn in water from wells to homes ranges from 8 to 50%. The interior well field of mid-Tucson, may represent background concentrations of Rn with a mean value of 250 pCi/L. The limited data define an anomalous trend (500 to 1400 pCVL) of ²²²Rn paralleling the Santa Cruz River area. 222Rn concentrations above 500 pCVL correlate positively with temperature, and no low temperature water contains high ²²²Rn levels. Weak inverse correlations of ²²²Rn with pumping bowl depth, pumping water level and average upper perforation intervals are evident. It is concluded that the source of ²²²Rn is close to the well bore. Considered are several possible hypothesis and mechanisms responsible for the anomalous Santa Cruz ²²²Rn trend, including mechanisms related to water circulation along the Santa Cruz fault, lithology, and aquifer compaction.
Degree ProgramHydrology and Water Resources