Natural airflow through the Apache Leap tuff near Superior, Arizona
AuthorSmith, Stewart James,1956-
Radioactive waste disposal in the ground -- Arizona -- Superior Region.
Committee ChairEvans, Daniel D.
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.
AbstractSignificant natural airflow occurs in two boreholes tapping unsaturated, fractured tuff at the Apache Leap Tuff Site near Superior, Arizona. Flow rate and direction through the more productive hole and atmospheric pressure and temperature were monitored during periods from December 1987 through June 1988. A strong correlation between flow velocity and atmospheric pressure exists at time scales of minutes to months, while the effect of temperature on flow is manifested by a seasonal reversal in net flow direction. Net outward flow occurs in winter, reversing to net inward flow by late spring. The observed flow pattern is consistent with that observed at Yucca Mountain, Nevada, which is similar both lithologically and topographically to the Apache Leap Site. The effect of natural airflow on moisture distribution and gaseous radionuclide transport within the tuff should be considered in assessing the suitability of similar sites for high-level waste disposal.
Degree ProgramHydrology and Water Resources