Figure 1 Configuration of the HWWTP (adapted from NIWA 2012) 5
Figure 2 Compliance of DO concentration (g/m3) with consent conditions in the
primary and secondary oxidation ponds 2015-2016 13
Figure 3 Faecal coliform numbers in the HWWTP effluent, 1992 to 2016 16
Figure 4 Daily discharge volumes (m3/day) from the HWWTP and daily rainfall
data (mm) from a Council rainfall station approximately 5 km east of the
site, 1 July 2015 to 30 June 2016. Inset: Rainfall and outflow data from
Summary of performance for consent 7520-1 24
Table 12 Evaluation of environmental performance over time 25
List of figures
Figure 1 Configuration of the HWWTP (adapted from NIWA, 2012) 4
Figure 2 Daily hours where DO is greater than 0 g/m3 in Pond 1 and 2 8
Figure 3 Daily discharge volumes (m3/day) from the HWWTP and daily rainfall data (mm) from a
Council rainfall station located approximately 5 km east of the site (2018-2019) 13
Figure 4 Location of intertidal survey
the frequency of sample collection earlier in the period. Sampling commenced in
early November 2010 with three of the sampling surveys performed prior to January
2011. The majority of the surveys were performed over the latter half of the summer
period. Bathing water samples were normally taken between the hours of 0900 and
1800 hours (NZDST) with none collected within a three day period following
significant river fresh conditions. [NB: regional differences in rainfall patterns have
caused
irrigation was high. Most irrigation had
commenced by the middle of December.
Over the five month summer irrigation period, Mount Taranaki recorded between 69% and
88% of normal rainfall which meant that rivers were running well below mean flows for the
entire period. The low stream flows necessitated close and frequent monitoring by the Council
to ensure ecological flows were maintained in those waterways being used to supply water for
irrigation. During the period under review compliance with
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
Council meeting agenda November 2019
contributing waterways drain off the high, steep, unstable slopes of
Mount Taranaki and are capable of transporting large amounts of coarse sediment as bed load, as
well as fine sediment (TRC, 2011). Additionally, the orographic influence of Mount Taranaki results in
high local rainfall and attracts high intensity rainfall events in the headwaters of rivers originating on
the Maunga. This means sediment transport rates, and the frequency of sediment transport events,
are likely to be relatively high in the
application rates for Farm 1 56
Figure 47 Paddock annual nitrogen application rates for Farm 2 56
Figure 48 Paddock annual nitrogen application rates for Farm 3, fixed irrigator network 57
Figure 49 Paddock annual nitrogen application rates for Farm 3, travelling irrigators 57
Figure 50 Monthly mass of nitrogen irrigated 59
Figure 51 Monthly rainfall totals and median soil moistures 59
Figure 52 Estimated monthly mass of phosphorus irrigated 59
Figure 53 Total nitrogen
points (when allowed) the
Company is required to put out signs at predefined locations discussing limited access. At no point during
this monitoring period were lake levels below the usable range, therefore, any inability to use the ramp was
a result of maintenance issues. Boat ramp usability is discussed later in this report. During large rainfall
events the 78 m upper limit was briefly exceeded during this monitoring period. The Company is to
page
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endeavor to ensure
for irrigation was high. Most irrigation had
commenced by the middle of December 2014.
Over the five month summer irrigation period, rainfall was between 62% and 106% of normal
which meant that rivers were running well below mean flows for the entire period. The low
stream flows necessitated close and frequent monitoring by the Council to ensure ecological
flows were maintained in those waterways being used to supply water for irrigation. During
the period under review compliance with