Analysis of Single-Hole and Cross-Hole Tracer Tests Conducted at the Nye County Earl Warning Drilling Program Well Complex, Nye County, Nevada
Author(s) -
A.M.A. Umari,
John D. Earle,
Michael F. Fahy
Publication year - 2006
Publication title -
osti oai (u.s. department of energy office of scientific and technical information)
Language(s) - English
Resource type - Reports
DOI - 10.2172/893816
Subject(s) - borehole , tracer , geology , drilling , aquifer , flow (mathematics) , hydrology (agriculture) , alluvium , advection , geotechnical engineering , geomorphology , groundwater , mechanics , engineering , physics , nuclear physics , mechanical engineering , thermodynamics
As part of the effort to understand the flow and transport characteristics downgradient from the proposed high-level radioactive waste geologic repository at Yucca Mountain, Nevada, single- and cross-hole tracer tests were conducted from December 2004 through October 2005 in boreholes at the Nye County 22 well complex. The results were analyzed for transport properties using both numerical and analytical solutions of the governing advection dispersion equation. Preliminary results indicate effective flow porosity values ranging from 1.0 x 10{sup -2} for an individual flow path to 2.0 x 10{sup -1} for composite flow paths, longitudinal dispersivity ranging from 0.3 to 3 m, and a transverse horizontal dispersivity of 0.03 m. Individual flow paths identified from the cross-hole testing indicate some solute diffusion into the stagnant portion of the alluvial aquifer
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