New permeameters for in situ characterization of unsaturated heterogeneous permeability: Development, design, testing, and application. Annual progress report, October 1996--October 1997
'During the past year, contractual difficulties have prevented significant progress on this research. This research project is a joint effort between New Mexico Institute of Mining and Technology (NMIM and T) and Sandia National Laboratories (SNL). As specified in the proposal, NMIM and T was to award a subcontract to SNL. Unfortunately, NMIM and T and SNL were unable to come to a satisfactory agreement on the nature of the subcontract until August, 1997, when funds were finally transferred from NMIM and T to SNL, As a result, first year progress has been less than expected. Despite these difficulties, some progress has been made during fiscal year (FY) 1997. The evaluation of steady-state methods for inverting permeameter data is nearing completion. As part of this effort, the authors developed several new approaches for estimating unsaturated hydraulic conductivity from steady-state permeameters, verified new and existing approaches for inverting steady-state data, and are preparing several manuscripts related to steady-state permeametry. Although steady-state methods for estimating unsaturated hydraulic conductivity can potentially yield accurate estimates of unsaturated hydraulic conductivity, practical implementation of these methods will violate the first design criterion, rapid measurement (presented below). Due to the large time scales associated with steady-state methods, they have chosen to focus further efforts on transient techniques. Because straightfoward analytical inversion approaches arc not an option for transient tests, numerical inversion methods will be used for transient permeametry, and the authors are currently evaluating several numerical codes for use in the inversion of have chosen a modular approach for permeameter design to maximize final product flexibility, permeameter data. The authors Individual components can then be used in several permeameter configurations. Preliminary designs of permeameter components have been completed. These designs will be finalized, fabricated, and tested during FY 1998.'
- Research Organization:
- New Mexico Inst. of Mining and Technology, Dept. of Earth and environmental Science, Socorro, NM (US)
- Sponsoring Organization:
- USDOE Office of Environmental Management (EM), Office of Science and Risk Policy
- DOE Contract Number:
- FG07-96ER14704
- OSTI ID:
- 13614
- Report Number(s):
- EMSP-55109--97; ON: DE00013614
- Country of Publication:
- United States
- Language:
- English
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