surveys 59
4.2.10.3 Cyanobacteria 60
Timaru Stream at Weld Road (near mouth) 61 4.2.11
4.2.11.1 Comparison with guidelines 63
4.2.11.2 Comparison with previous summers’ surveys 63
4.2.11.3 Benthic cyanobacteria 64
Waimoku Stream at Oakura beach 65 4.2.12
4.2.12.2 Compliance with guidelines 67
4.2.12.3 Comparison with previous summers’ surveys 68
Oakura River below SH45 69 4.2.13
4.2.13.1 Comparison with guidelines 71
4.2.13.2 Comparison with previous summers’ surveys 72
4.2.13.3
Silver Fern Farms Waitotara Annual Report 2023-2024
Considerations of Stream Size in Determining Minimum Flows and Water Allocation Limits in Taranaki rivers
Todd Petroleum Ltd Mangahewa D Hydraulic Fracturing Report 2022-2023
surveys 63
4.2.10.3 Cyanobacteria 64
Timaru Stream at Weld Road (near mouth) 65 4.2.11
4.2.11.1 Comparison with guidelines 67
4.2.11.2 Comparison with previous summers’ surveys 67
4.2.11.3 Benthic cyanobacteria 69
Waimoku Stream at Oakura beach 69 4.2.12
Oakura River below SH45 70 4.2.13
4.2.13.1 Comparison with guidelines 72
4.2.13.2 Comparison with previous summers’ surveys 72
4.2.13.3 Benthic cyanobacteria 73
Waitara River at the town wharf, Waitara 74 4.2.14
4.2.14.1
Comparison with previous summers’ surveys 68
3.2.15 Lake Ratapiko 69
3.2.15.1 Compliance with guidelines 70
3.2.15.2 Comparison with previous summers’ surveys 71
3.2.15.3 Cyanobacteria 71
3.2.16 Lake Rotokare 72
3.2.16.1 Cyanobacteria 73
4. General data summary 75
4.1 Comparison with thirteen previous summers’ surveys 78
4.2 General 79
5. Recommendations 81
Bibliography and References 82
Appendix I MAC assessments for all sites 85
Appendix II High tide times 95
previous summers’ surveys 71
4.2.11.3 Benthic cyanobacteria 72
Waimoku Stream at Oakura beach 72 4.2.12
Oakura River below SH45 73 4.2.13
4.2.13.1 Comparison with guidelines 75
4.2.13.2 Comparison with previous summers’ surveys 76
4.2.13.3 Benthic cyanobacteria 77
Waitara River at the town wharf, Waitara 78 4.2.14
4.2.14.1 Comparison with guidelines 81
4.2.14.2 Comparison with previous summers’ surveys 82
Urenui River at the estuary 83 4.2.15
4.2.15.1 Comparison with guidelines
trend analysis 68
page
iii
4.11.4 Cyanobacteria 68
4.12 Waimoku Stream at Oakura Beach 68
4.12.1 Comparison with guidelines 70
4.12.2 Comparison with previous summer surveys 71
4.12.3 Long-term trend analysis 72
4.13 Oakura River below SH45 72
4.13.2 Comparison with previous summer surveys 74
4.13.3 Long-term trend analysis 75
4.13.4 Cyanobacteria 76
4.14 Waitara River at the town wharf, Waitara 77
4.14.1 Comparison with guidelines 79
Timaru Stream at Weld Road 74
Table 68 Statistical results summary for the Timaru Stream at Weld
Road 75
Table 69 Bacterial guidelines performance at the Timaru Stream,
Weld Road site [% of 13 samples] 77
Table 70 Summary of E. coli bacteriological water quality data to date
(cfu/100ml) for all summer surveys in the Timaru Stream at
lower Weld Road 78
Table 71 Analytical results for the Waimoku Stream at Oakura beach 80
Table 72 Statistical results summary for the Waimoku Stream
in relation to the Kapuni-J fracturing event
Pre-fracturing 3mth post fracturing 1 year post fracturing
Sample date Unit 12/04/2023 19/12/2023 26/09/2024
Sample time - 10:25 11:45 13:30
Sample id. TRC - TRC2311827 TRC2315844 TRC2420119
pH pH 6.9 7.5 6.8
Temperature °C 14.5 16.4 14.4
Total alkalinity g/m3 CaCO3 87 84 72
Bicarbonate g/m3 HCO3 106 102 87
Total hardness g/m3 CaCO3 47 46 54
Electrical conductivity mS/m 25.5 24.1 29
Total dissolved solids