iv 20.0 Water Quality Criteria for the Ohinemuri River 111 20.2 Predicted Ohinemuri River Water Quality Compliance 113 20.3 Effects of Water Quality Criteria on Ecological Values 114 20.4 Treated water discharge and NOF 120 20.5 Effects of temperature on ecological values 128 20.6 Effects of sulphate on ecological values 135 21.0 Treated water pipeline and outfall (Diffuser) 138 21.1 Introduction 138 21.2 Pipeline installation 138 21.3 Effects of pipeline construction on aquatic ecological values 138 21.4 Diffuser installation 140 21.5 Effects of diffuser construction on aquatic ecological values 140 22.0 Management of Effects 141 22.1 Introduction 141 22.2 Stream reclamation and diversions 141 22.3 Stream reclamation 145 22.4 Stream offset calculations 145 22.5 ECR multiplier 145 22.6 Quantum of stream offset 146 22.7 Additional compensation provisions 148 22.8 Location of stream offsets 148 23.0 Additional positive enhancements 152 23.1 Background 152 23.2 Integrated mitigation 152 23.3 Pest and weed management 152 23.4 Additional riparian planting: Mataura Stream catchment 153 23.5 Reinstatement of Tributary 2 153 23.6 Enhancement of the Mataura wetland 153 23.7 Creation of wetland as part of TSF3 diversion 153 23.8 Landscape planting 153 23.9 Tailings lakes enhancement 154 23.10 Specific enhancements for tuna (eel) habitat 154 24.0 Conclusion 155 25.0 References 156
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