caddisflies). The MCI index (widely used to monitor macroinvertebrates in
streams) is high (typically >100) in streams dominated by mayflies, stoneflies and caddisflies and low
(typically <80) in streams dominated by worms, snails and chironimids.
In Taranaki, nutrients are not such a problem because of fast flowing and relatively short rivers and
streams. High rainfall leads to frequent flushing events in rivers and streams that provide natural
scouring. Even in summer, most Taranaki rivers do
on aquatic life.
4.4.3 Climate
NIWA virtual Climate Station -38.975, 174.525 Thirty years of rainfall and evaporation data is
summarised in Table 1 below
Table 1: NIWA Virtual Climate Station 30-year data for a site near Uruti Site
Uruti Jan Feb Mar Apr May Jun Jul Aug Sept Oct Nov Dec Total
Rainfall 120.0 107.0 119.2 151.2 181.2 189.5 181.8 178.0 175.4 188.4 149.4 149.0 1890.
Evaporation 134.5 108.0 88.6 52.7 31.1 21.4 25.4 39.0 57.5 85.1 109.3 126.0 878.6
4.4.4
infiltration expenditure during the 2021-2022 monitoring year consisted of:
• $3,325 spent on 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
performance for consent 7470-1.1 16
List of figures
Figure 1 Location of TTR site production and monitoring bores 5
Figure 2 Daily abstraction volumes under consent 7470-1.1 (July 2014-June 2015) 10
Figure 3 Daily abstraction volumes under consent 7470-1.1 (2009-2015) 10
Figure 4 Maximum daily abstraction rate under consent 7470-1.1 (2014-2015) 11
Figure 5 Maximum daily abstraction rate under consent 7470-1.1 (2009-2015) 11
Figure 6 Observed groundwater levels and rainfall
Revised Assessment of Environmental Effects (AEE) - June 2020
between the
relatively ‘shallow’ groundwater table and the Haehanga Stream.
This may vary at different times of the year, for example, depending
page
5
on rainfall and stream flows. This information is needed to assess
the impact of the discharge to the irrigation areas (and potentially
the composting pads and ponds) on the groundwater and the
subsequent effect due to contaminated groundwater entering
surface water.
18 An initial review undertaken by LEI identified a
there will always be a delay
between sample collection, analysis, receiving results and
delivering the public health advice. This is primarily because
bacteria need time to grow in the lab as part of the analytical
process. While we can try to minimise the time between
sample collection and delivery of the information, there will
always be a delay.
By collecting all-weather water quality data, it may be
possible to develop a predictive rainfall risk model, which can
due to a heavy
rainfall prior to the inspection. No odour, foam or sheen was noted. The Mangatete weir appeared to be in
sound order as it had recently been repaired. The stream flowed freely over the structure. The flow was
moderate in height. A good level of residual flow was maintained over the fish pass. A small rock partially
blocked the structure. This should be removed if practicable as it may act as an obstruction which initiates
the accumulation of material at the fish pass. The rate
August 2023 and 20 June 2024, at
the site during the monitoring period to assess compliance with resource consent conditions.
The site was empty and no activity was occurring during either inspection. The site was clean and tidy. Re-
grassing had been undertaken place to aid in better absorption for storm water. Despite heavy rainfall
preceding the August inspection, the site appeared to be containing storm water generated within it.
2.2.2 Results of discharge monitoring
Stormwater
significant rainfall
events.
13. The Company continues to be proactive in their response to objectionable odour identification, with
areas of the main storage shed closed to prevent odour release. Mesh doors that were installed during
the 2020/21 period continue to prevent mass air movement from within the shed. The Company also
maintains shelter belts/vegetative environmental buffers (VEBs), as a passive odour mitigation
technique. These buffers continue to establish and mature.