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Wetting-front movement, flow-field evolution, and drainage of fracture flow paths were evaluated within the Topopah Spring welded tuff at Yucca Mountain, Nevada. Equipment and techniques were developed for in situ quantification of formation intake rates, flow velocities, seepage rates, and volumes of fracture flow paths. Localized injections of liquid into a low-permeability zone (LPZ) and a high-permeability...
We have carried out a numerical modeling study in conjunction with the in situ liquid-release experiment described in Salve et al. [J. Hydrol. 257 (2001)]. The experiment site is a highly fractured welded tuff accessed from the Exploratory Studies Facility, an underground laboratory in the unsaturated zone at Yucca Mountain, Nevada. The experiment examines the effect of the rock matrix on liquid flow...
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