was indicative of well-treated wastewater, with parameters typical of a municipal oxidation
pond system receiving minimal industrial waste loadings. No significant impacts on the Kaupokonui River
were recorded from the physicochemical parameters analysed during the mid-summer survey conducted in
January 2022, when a low discharge rate of well-treated wastewater characterised this system. No significant
impacts of the effluent discharge were indicated by MCI scores through the reach of the
environmental
performance and compliance for 878 (87%) of a total of 1007 consents monitored through the Taranaki
tailored monitoring programmes, while for another 96 (10%) of the consents a good level of environmental
performance and compliance was achieved. A further 27 (3%) of consents monitored required improvement
in their performance, while the remaining one (<1%) achieved a rating of poor.
In terms of overall environmental and compliance performance by the Company over the last several years,
through the refinement of methods and considered responsible resource utilisation, to move closer to
achieving sustainable development of the region’s resources.
1.1.4 Evaluation of environmental and administrative performance
Besides discussing the various details of the performance and extent of compliance by the consent holders,
this report also assigns a rating as to each companies environmental and administrative performance during
the period under review. The rating categories are high,
discharge:
These details are provided in sections 3 and 5 of the attached
Assessment of Environmental Effects.
page
Liquids discharged to water
What is the proposed maximum rate of discharge?
Rate 55000.0
Unit Litres per second
How frequent is the discharge? Not constant
Hours per day 0.00
Days per week 0.00
Other
Give full details of the method of discharge: The discharge of water to the Mako Stream will occur at times
when the
any
treatment it will receive prior to discharge:
These details are provided in sections 3 and 5 of the attached
Assessment of Environmental Effects.
Liquids discharged to water
What is the proposed maximum rate of discharge?
Rate 2000.0
Unit Litres per second
How frequent is the discharge? Not constant
Hours per day 0.00
Days per week 0.00
Other Will occur during maintenance periods only.
page
Give full details of the method of
filtering, while for the weasel data set 141,825 SNPs were retained. Given the
different sizes of the two data sets and the filtering parameters that are affected by
sample size, these numbers may not reflect the relative genetic diversity of these two
species accurately. However, it appears that weasels have considerably more genetic
variation than stoats in Taranaki. All quality metrics for each SNP were high, with the mean
page
- 6 -
sample depth (8.4) and mean co-call rate
Consents & Regulatory Committee agenda February 2021
Landscape Guidance Note2
and its signposts to examples of best practice.
1.2.2 Effects Ratings and Definitions
An outline of the effects ratings and definitions used in this assessment is provided in the Boffa
Miskell: Natural Character, Landscape and Visual Effects Assessment Methodology (11
February 2019) attached as Appendix 1. In summary, the significance of effects identified within
this assessment are based upon a seven-point scale which includes very low; low; moderate-
low;
Lake Mangamahoe 23
5.1 Historic aerial imagery analysis 23
5.2 Observed morphology and processes 25
5.3 Bathymetric surveys 26
5.4 Annual sediment infill rate 29
6 Summary 32
7 Applicability 35
8 References 36
Appendix A : Catchment scale sediment sources
Appendix B : Downstream geomorphic assessment
page
Tonkin & Taylor Ltd
Mangorei HEPS Consent Renewal - Lake Mangamahoe Sediment Assessment
Trustpower Ltd
November 2020
Job
enables the Council to continually re-evaluate its approach
and that of consent holders to resource management and, ultimately, through the refinement of methods
and considered responsible resource utilisation, to move closer to achieving sustainable development of the
region’s resources.
1.1.4 Evaluation of environmental performance
Besides discussing the various details of the performance and extent of compliance by the consent holders,
this report also assigns a rating as to each Company’s