structures;
viii) The locations of all specific points of discharge from the work area to the environment; and,
ix) Any other relevant site information.
d) Construction timetable for the erosion and sediment control works and the bulk earthworks proposed;
e) Maintenance, monitoring and reporting procedures;
f) Rainfall response and contingency measures including procedures to minimise adverse effects in the
event of extreme rainfall events and/or the failure of any key erosion and sediment
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Pukeiti Rhododendron Trust Inc.
NEWSLETTER
Rhododendrons in a Rainforest
S E P T E M B E R 2 0 2 4 V O L U M E 7 1 N O . 2
www.pukeiti.org.nz
Meeting epiphytes and other
aerial plants at Pukeiti
Heather Robson led an informative walk to sites in
the rainforest to observe the epiphytes and other
climbing plants. There are many types and the
rainfall at Pukeiti is ideal and they festoon and
cover the trunks of many of the taller trees. True
epiphytes germinate on
monitoring 9 November 2023 21
Table 6 Surface water monitoring 25 January 2023 23
Table 7 Surface water monitoring 22 March 2024 25
Table 8 Surface water monitoring 31 May 2024 27
Table 9 Metals in surface water and WTS discharge 29
Table 10 Biomonitoring sites in the Haehanga Stream Catchment and comparable reference site 31
Table 11 Taxa, MCI and SQMCI results for Haehanga Stream Catchment and reference site for current
and previous surveys. 33
Table 12 Rainfall and irrigation volume in the
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Taranaki Regional Council Monthly Rainfall and Environmental
Data Report for February 2024
Note: The data presented here are provisional data only and may change as a result of quality control at a later date.
1. Rainfall
Map 1: February total rainfall (mm) and percentage of long-term mean (colour key).
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Map 1a. Total rainfall 1 January to end February (mm) and percentage of long-term mean (colour key).
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Table 1:
that so
few limits were breached indicates excellent management of the scheme.
There are certain operational requirements also set by consents, which require flushing flows of 400L/s to be
released down the residual flow reach once the Tariki weir has not naturally overtopped for 30 days. There
was one occasion during April 2024 when the Company provided a notification with regard to extremely low
flows in the Manganui River due to unusually low rainfall for a sustained period. Generation
practices;
c. access to and from the site for vehicles and machinery;
d. the staging of each area and how the staging relates to the erosion and sediment
control devices;
e. the design criteria and dimensions of all key erosion and sediment control
structures;
f. works monitoring, including routine monitoring, rainfall triggers and significant
rainfall event contingencies;
g. identification of key roles and responsibilities for ESCP implementation;
h. spill contingency planning; and
i.
collection and retention systems; stormwater sampling and inspections
of the discharge point and receiving waters in the Herekawe Stream. Scheduled inspections were carried out
on 6 July 2023 and 3 August 2023. Notes from these visits are summarised below.
6 July 2023
First inspection for 2023/24. On site 14:00 to 14:50 representatives from Dow, Tonkin & Taylor and SGS.
50mm of rainfall had been recorded over the previous week at the Brooklands Zoo station. Stormwater
ponds SV8000 and SV9200
monitoring year, with irrigation
commencing in late October and concluding in mid-April across the region. Rainfall recorded at the
Council’s monitoring locations over the summer irrigation period ranged between 109% and 163% of
historical mean values. Due to the higher rainfall, irrigation demand was lower with a total water usage of
4,063 ML during the 2022-2023 season. This was lower than the preceding 2021-2022 monitoring year,
which recorded 6,960 ML.
The Council carried out compliance
shows that groundwater levels are generally stable, with fluctuations the result of
seasonal rainfall and pumping effects. It was noted that we are already starting to see
an increase in demand for ground water and this has the potential to grow in response
to pressure on surface water. However, it is not expected that this will place
groundwater under significant pressure in the near future. Also, groundwater
Policy and Planning Committee - Confirmation of Minutes
7
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