Water intake at the atmosphere-earth interface in a fractured rock system near Patagonia, Arizona
AuthorKilbury, Richard Kenneth.
Hydrology -- Arizona -- Patagonia Region.
Rain and rainfall -- Arizona -- Patagonia 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.
AbstractSurface water intake into a fractured rock system provides water for downward percolation and transport of contaminants. This study involves the measurement and simulation of water intake across the atmosphere-earth boundary, for an exposed densely welded tuff, near Patagonia, Arizona. Water and air intake rates were measured using a fractured rock infiltrometer (FRI). Calculated fracture apertures using water and air agreed Well. Fracture apertures determined using water range from 1.0 to 33.7 pm and are shown to be log-normally distributed. Rainfall events are reconstructed in a model to simulate flow across the atmosphere-earth boundary. As an example a ten-year simulation resulted in a mean annual intake rate of 2.1 millimeters (mm), and is shown to be more dependent on storm duration than intensity. Developed methods provide a means of characterizing water intake rates into a fractured rock surface based on rainfall characteristics.
Degree ProgramHydrology and Water Resources