GHD | Oceana Gold (New Zealand) Ltd | 12552081 | Waihi North 57 . Table 3.13 Estimated groundwater discharge to surface water bodies during operational TSF scenario Surface water body Estimated groundwater discharge to surface water body (m3/day) Percentage change in groundwater discharge from current conditions Percentage change in groundwater catchment Gladstone Wetland / Ohinemuri tributary (TB4) 0.5 -33% -22% Ohinemuri tributary (TB5) 0 0% 0% Ohinemuri River east of Gladstone (OH3) 50 -<1% -12% Ohinemuri River west of Gladstone (OH6) 160 -27% -19% Notes: - Considering model uncertainty, results have been rounded. Table 3.14 Estimated groundwater discharge to surface water bodies during TSF closure scenario Surface water body Estimated groundwater discharge to surface water body (m3/day) Percentage change in groundwater discharge from current conditions Percentage change in groundwater catchment Gladstone Wetland / Ohinemuri tributary (TB4) 2.5 +156% +84% Ohinemuri tributary (TB5) 0 0% 0% Ohinemuri River east of Gladstone (OH3) 55 +15% +10% Ohinemuri River west of Gladstone (OH6) 210 -2% -7% Notes: - Considering model uncertainty, results have been rounded. Table 3.15 Estimated groundwater discharge to surface water bodies during long-term TSF scenario Surface water body Estimated groundwater discharge to surface water body (m3/day) Percentage change in groundwater discharge from current conditions Gladstone Wetland / Ohinemuri tributary (TB4) 3 +197 Ohinemuri tributary (TB5) 5 NA* Ohinemuri River east of Gladstone (OH3) 55 +15% Ohinemuri River west of Gladstone (OH6) 315 +46% Notes: - Considering model uncertainty, results have been rounded. * Calculation not undertaken as no groundwater baseflow predicted during current conditions
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