Fig. 5. Numerical meshes of (a) Niche 5 with Borehole 4, (b) Niche 5 with Borehole 5, and (c) the Cross Drift, along with a typical realization of the correlated stochastic permeability field. Bold black lines denote the liquid-release boreholes; the white section in the middle of the boreholes is the injection interval.