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780,000 770,000 o 760,000 750,QOO 1 e Potantiai ne~S~ Boundary 1 560,000 EASTING, M 570,000 1~01~n am, In m~aar [a: :: ~s~:i~I Tea Canyon TuM 0 22 modorataly welded Tea Canyon Tu# welded Paintbrush Group nonwe~ed 1u# 0.02 13.40 Topopah SpMng Tu# fled 0.08 Rainier Mesa Tu# 0.06 PLATE 1 Spah~Hy dis~ibu[ed icon in bedrock Unix. From Flint and Flint (1994, Figure 4 Id Tale 3~. Copyright 1994 by me Amedc~ Nuclei Society, Lo Crange Pay, . . Illmols.

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UTM EASTING, IN METERS 545.000 550.000 555.000 o o o CO o CD A I a: 0 o $ LO 0 o o o o o EXPLANATION .,: - , JO , 4 I: 1 0 20 30 40 50 60 70 80 NET INFILTRATION, IN MILLIMETERS PER YEAR PLATE 2 Spatial distribution of net infiltration. From Flint et al. (1996a, Figure 39~.

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- \ ~ ui \ ~ - I*73 \ \ .~ PLATE 3 NMRI flow profiles in fractures showing 2D slices through a 3D image of the principal (A velocity component of water flowing inside the rock fracture. Fracture sam- ple dimensions are ~36 mm by ~18 mm. (a) Two yz-slices with x = 4.7 and 15.2 mm, and an xz-slice with y = 4.0 mm, parallel to the principal flow direction (indicated by the round arrow); and three xy-slices with z = 2.8, 12.7, and 22.5 mm, perpendicular to the principal flow direction; (b) two yz-slices with x = 4.7 and 17.3 mm, parallel to the principal flow direction; (c) an xz-slice with y = 4.0 mm, parallel to the principal flow direction; (d) three xy-slices with z = 2.8, 12.7, and 21.1 mm, perpendicular to the princi- pal flow direction. Darker shades represent regions of higher velocity. The vertical scale is highly exaggerated, since the image scale is in units of measured volume elements. Control tubes are clearly visible on the two sides of the fracture sample. After Dijk et al. (19991.

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lo lo of a) en lo 1 ' C\l cn ' . - lo lo lo cM lo lo cM lo lo [e use Bun] ~ Depth (cm) 0 0 0 0 0 0 ~ ~ ~ ~ O 0.05 1 I 1 I I ~..,,~ ~ : ... l l l l o o 0.05 o ~ ~ o . o o o o CM Depth (cm) O O O O ~ ~ ~ O I 1 i i , ~ ,,~ . r . I , .~ O.. Ct 0 p~ ~o (~) 0 a~ c~ ~ ~ ~ s _ C~ ~o CQ 0 4. Ct ~ 0 ~ 3 - ~ ~o C~ s~ s~ ~o ~ ~ a~ t0 ~o ~ ~ 5 ~ = ~ o o .= ~.s ~ o . _1 ~ Ct ~ ^ o ~ . ~ oN 5_, ,= . ~ ~ ~ cd ~ o o ~ ~ ~ P_ c~ ~ a~ .= ~ ~ o ~ o~ o c~ ~ cn a~ Q ~ ~ ~ ~ ^ o O O ~ 1_ - ^ h.= ~ ~o

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O ~ ~ I ~ ~ ~ ~ O () Cal ~ . in o . o a) o la to in o Cal o Cal C) r o 3 so At ~ Cal a; o 3 o NIL .m [a

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~ 2.36E5 En Lo A in: o ~ 2.34E5 > SD- . . ~, Model boundary 1.68E5 1.70E5 1.72E5 1.74E5 EAST N EVADA COORDINATES (m) PLATE 6 A plan view of the three-dimensional UZ site-scale model domain, showing grid and locations of boreholes (including perched water boreholes) used for model cali- bration.

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I / 1 470 \ meters (masl) 770 ~ 1~_ ~~q. 1 68000 1 69000 100% Liquid Saturation Isosurface Top surface of the Tac (2x vertical exaggeration) 17000~~ L___ _ ~ E6Sting(~) 171000 ~ ~ 1 72000 1 73000 239020 238000 236000 ~23400( 231040 PLATE 7 Three-dimensional perched-water bodies near the base of the TSw, using the permeability barrier conceptual model. c

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239000 238000 237000 236000 a) Is 235000 a a 234000 > I 233000 a z 232000 231000 230000 1 1 1 1 1 - 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 mm/year 10 9 8 7 6 5 4 3 2 1 o 168000 170000 172000 174000 East Nevada Coordinates (m) PLATE 8 Percolation flux (mm/yr) contours at the water table.