pipeline renewals
• $891 spent on CCTV.
The expenditure for pipeline renewals was entirely on project management, investigation and design. No
construction occurred.
A wastewater network modelling project is underway which uses rainfall and flow data to create a calibrated
digital model of the entire Inglewood wastewater network. The calibrated model will be used to assess
network performance under different storm events of varying duration and return interval, along with
projected
With a loading rate of 4mm/day for the disposal
field.
• 30% buffer area for the disposal field to allow for separation from water ways
and any land unsuitable for disposal which may be present in the land parcel.
• Disposal only when the day’s rainfall is <10mm.
• The approximate 4 year period for which data is supplied is representative of all
foreseeable flow scenarios.
• The scheme should give consideration to the maximum flows, successive days of
maximum flows and be
moderate
elevations 28
Figure 14 Groundwater elevations GND2691, GND2692 and 2693-located south east of the site at higher
altitudes 29
Figure 15 Groundwater elevations GND2700, GND2701 and GND2703-located centrally at the site at
moderate altitude 30
Figure 16 Groundwater elevations in the deep bore GND0599 in comparison to rainfall 31
Figure 17 Groundwater elevations in the shallow bores GND2702 and GND0600 in comparison to
rainfall 32
Figure 18 Groundwater elevations in
Mangati Catchment Joint Annual Report 2022-2023
Experts generally agree that climate change is affecting New
Zealand’s weather patterns. In Taranaki, rainfall is predicted
to decrease in summer and increase in winter. An increase
in extreme rainfall is likely as the temperature increases
through the 21st century, potentially increasing both the
severity and frequency of flooding. South Taranaki is
predicted to become drier on average, with more frequent
droughts. Gale and storm force winds from the west are also
predicted to
following the removal of the continuous
discharge to the stream.
page
7
2 Results
2.1 Inspections
18 September 2018
An inspection was conducted in cloudy weather with light northerly wind conditions. The rainfall recorded at
the Inglewood WWTP council weather station in the month prior was 147 mm.
NPDC contractors were onsite carrying out maintenance around the primary screen influent area. Mild
odours were noted in the vicinity of the step screen. The primary
exceedance rainfall event (AEP) event. The
maximum discharge rate from the pond during large rainfall events is 1,060 L/s as this is dictated by the size
of the outfall pipe (750 mm). However, there is also provision for the pond to overflow via a spillway
structure to a discharge swale (i.e. bypassing the 750 mm discharge pipe).
At the time of the application it was indicated that, as a result of stormwater inputs to the pond, the
discharge rate from the pond to the Mangorei Stream would be
......................................................................................... 10
5.2 Surface water Sampling Plan ........................................................................................... 11
5.3 Monitoring Review and Actions ........................................................................................ 13
6.0 .......................................................................................................................................... 13
7.0 Uruti Site Rainfall
rainfall and temperature, being absent from areas with low rainfall and
cooler temperatures. It can tolerate both high light and relatively shaded habitats.
Populations are often disconnected due to their specific habitat requirements and
the limited extent of old-growth forest.
TAWHIRIKARO IN TARANAKI
Tawhirikaro has been
recorded in many locations
around Taranaki, with
sightings on the Kaitake
Ranges, at Pukeiti and a
number of scenic reserves
within
measured and achieved. In first iteration plans, it will
also be particularly difficult to meet many of these ‘musts’, rather it will be a case of making
incremental progress over time.
• The E.coli component of the NOF is problematic. The E.coli grade is based on the lowest scoring
area across four different criteria. One of these – the 95th percentile – is highly influenced by
heavy rainfall. In a region like Taranaki, where such rainfall is common, achieving the
improvements