Moisture characteristic curves for Apache Leap Tuff: Temperature effects and hysteresis, Superior, Arizona
| dc.contributor.advisor | Wilson, L. Graham | en_US |
| dc.contributor.author | Rhodes, Shirlee Colleen, 1951- | |
| dc.creator | Rhodes, Shirlee Colleen, 1951- | en_US |
| dc.date.accessioned | 2013-05-16T09:30:19Z | |
| dc.date.available | 2013-05-16T09:30:19Z | |
| dc.date.issued | 1993 | en_US |
| dc.identifier.uri | http://hdl.handle.net/10150/291555 | |
| dc.description.abstract | Laboratory methods were used to define matrix hydraulic properties for low-permeability Apache Leap Tuff core segments. Moisture content/matric potential relationships, including hysteresis, and measured hydraulic conductivity data were determined at a constant laboratory temperature of 20°C. To investigate the effects of temperature on those relationships, additional retention data were obtained at 5°C and 45°C. Measured retention data at all temperatures were applied to the van Genuchten model RETC, which performs curve-fitting and calculation of the flow parameter hydraulic conductivity. Although data at 5°C proved to be inconclusive, increasing the temperature from 20 to 45°C produced a shift of the moisture characteristic curve toward a higher potential for a given water saturation. Model-calculated hydraulic conductivity also increased as temperature increased, with respect to water saturation. The temperature-dependent change in the viscosity of water proved inadequate to explain the increases of hydraulic conductivity with temperature. | |
| dc.language.iso | en_US | en_US |
| dc.publisher | The University of Arizona. | en_US |
| dc.rights | Copyright © 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. | en_US |
| dc.subject | Hydrology. | en_US |
| dc.subject | Geotechnology. | en_US |
| dc.title | Moisture characteristic curves for Apache Leap Tuff: Temperature effects and hysteresis, Superior, Arizona | en_US |
| dc.type | text | en_US |
| dc.type | Thesis-Reproduction (electronic) | en_US |
| thesis.degree.grantor | University of Arizona | en_US |
| thesis.degree.level | masters | en_US |
| dc.identifier.proquest | 1352373 | en_US |
| thesis.degree.discipline | Graduate College | en_US |
| thesis.degree.discipline | Hydrology and Water Resources | en_US |
| thesis.degree.name | M.S. | en_US |
| dc.identifier.bibrecord | .b27054858 | en_US |
| refterms.dateFOA | 2018-05-18T00:22:17Z | |
| html.description.abstract | Laboratory methods were used to define matrix hydraulic properties for low-permeability Apache Leap Tuff core segments. Moisture content/matric potential relationships, including hysteresis, and measured hydraulic conductivity data were determined at a constant laboratory temperature of 20°C. To investigate the effects of temperature on those relationships, additional retention data were obtained at 5°C and 45°C. Measured retention data at all temperatures were applied to the van Genuchten model RETC, which performs curve-fitting and calculation of the flow parameter hydraulic conductivity. Although data at 5°C proved to be inconclusive, increasing the temperature from 20 to 45°C produced a shift of the moisture characteristic curve toward a higher potential for a given water saturation. Model-calculated hydraulic conductivity also increased as temperature increased, with respect to water saturation. The temperature-dependent change in the viscosity of water proved inadequate to explain the increases of hydraulic conductivity with temperature. |
