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Considerations of Stream Size in Determining Minimum Flows and Water Allocation Limits in Taranaki rivers

for water users. The number of days with total restriction depends on the minimum flow, as generally no take is allowed once the river flow falls below the minimum flow. Allocation affects the number of days there is likely to be partial restrictions with a 10% increase in allocation increasing the number of days per year with partial restriction by about 10 days. Minimum flow and allocation options in Table 1 are based on maintaining ecosystem health at a prescribed level. In assessing

NPDC Water Supplies Annual Report 2022-2023

water level and flow of the Ngatoro Stream at SH3. By using a correlation between these two sites, a calculated flow can be estimated for the ‘Bushline. Based on this correlation, as shown in Figure 4 the flow did not fall below the 134 L/s limit, so no restrictions were required to be put in place. Figure 4 Calculated flow for Ngatoro Stream at Bushline during 2022-2023 Jul-2022 Sep-2022 Nov-2022 Jan-2023 Mar-2023 May-2023 0 1 2 3 4 5 6 7 8 9 10 11 12

Report 2012-2014

and enhancement activities (well workovers). 1.3 Resource consents 1.3.1 Water abstraction permit (groundwater) Section 14 of the RMA stipulates that no person may take, use, dam or divert any water, unless the activity is expressly allowed for by resource consent or a rule in a regional plan, or it falls within some particular categories set out in Section 14. GPL holds water permit 7067-1 to take groundwater during hydrocarbon exploration and production operations from up

Application Appendix E Sediment Assessment 20 02053 4 0 + 5 other renewals Trustpower 25 Nov 2020

detail in Section A1. In addition, flood events in the Waiwhakaiho River display a ‘flashy’ nature, with flows rising and falling rapidly, discussed further in Section 3.2. The Waiwhakaiho River is an incised wandering, mixed bed river characterised by bed and bank material comprised of large boulders, cobbles, coarse gravels and fine sediment. The true left bank near the intake structure is bedrock (conglomerate), and on the true right, there are erodible banks of cobbles held in a loose