GHD | Oceana Gold (New Zealand) Ltd | 12552081 | Waihi North 86 Table I.2 TSF3 base model adopted material parameters Geological unit * KH (m/s) Measured K values** Anisotropy (KV/KH) VWC and K function# Geomean Range Ash/alluvium/colluvium 9.3 x 10-8 4.5 x 10-8 3.2 x 10-9 to 8.5 x 10-7 1 Sandy Loam Rhyolite Lava Flow (CW-MW) 5.8 x 10-7 1.3 x 10-7 1.2 x 10-9 to 1.0 x 10-4 1 Sandy silt Rhyolite Lava Flow (MW-SW) 1.2 x 10-5 5.0 x 10-6 1.0 x 10-8 to 1.0 x 10-4 1 Sandy silt Rhyolite Rock 1.3 x 10-5 No data. Value calibrated based on SW Lava Flow and adjusted to achieve downgradient artesian conditions 1 Sandy silt Rhyolite Lava Froth Flow 6.3 x 10-6 No data. Value calibrated based on SWCW Lava Flow values and adjusted to achieve downgradient artesian conditions 1 Sand Rhyolite Lava Froth pulse 1.2 x 10-7 2.8 x 10-7 3.2 x 10-9 to 2.4 x 10-5 1 Sandy silt Rhyolite Porphyritic Tuff 1.2 x 10-5 No data. Value calibrated based on tuff values and adjusted to achieve groundwater level calibration. 1 Silty Sand Rhyolite Redeposited Tuff 1.1 x 10-6 2.2 x 10-6 3.2 x 10-9 to 1.0 x 10-4 0.01 Silty Sand Rhyolite Tuff - Unit at DH14/AP01/AP05 2.3 x 10-6 1.6 x 10-6 2.4 x 10-7 to 1.5 x 10-5 0.01 Silty Sand Rhyolite Tuff - all other locations 1.0 x 10-7 1.6 x 10-8 5.7 x 10-10 to 6.5 x 10-6 0.1 Sandy silt * Geological units are colour coded as per the SEEP/W cross section ** Permeability values are from the results provided in Appendix D and CPT dissipation testing by EGL (2018). # VWC = Volumetric water content function (SEEP/W 2012 materials database) Base model calibration The results of base model calibration is presented in Table I.3 to Table I.5. The relationship between the measured and modelled results are presented in Figure I.3. Table I.3 Calibrated horizontal gradient across the TSF3 site Well ID Location Total head Modelled value: Measured (Feb-Mar 2018): AP11a Upgradient (ridge) 1,114.3 m RL 1,115.0 m RL AP04a Down gradient (near RU07) 1,108.5 m RL 1,109.5 m RL ΔH -5.5 m -5.5 m
RkJQdWJsaXNoZXIy MjE2NDg3