Table 11 Summary of performance for consent 10810-1 23
Table 12 Evaluation of environmental performance over time 24
List of figures
Figure 1 Configuration of the HWWTP (adapted from NIWA, 2012) 3
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 (2022-2023) 12
Figure 4 Location of intertidal
Quarries independent groundwater monitoring (blue) and flow gauging sites (orange) 10
Figure 4 Discharge rates from Civil Quarries stormwater system plotted against rainfall in 10 minute
interval totals. The red line is the consented discharge rate limit 14
Figure 5 Abstraction rates from Pond A which is where groundwater from the excavation pit is pumped
into (1 July 2022 to 30 June 2023) 15
page
iii
Figure 6 Biomonitoring sites in the Kurapete Stream in relation to
forming a tributary of the much larger Mimitangiatua awa
catchment. It runs from south-east to north-west. Almost the entire valley formed by the Stream is owned
by the Company, and consists of steep eroded hillsides, multiple side gullies, and small river flats distributed
along its length. The area receives more rainfall than the northern Taranaki coastline to the south-west. Soils
are generally poor and highly erodible. Patches of bush and planted trees cover most of the hillsides, with
the
Manawa Energy Patea HEP Annual Report 2022-2023
mass irrigated, 2009-
2023 48
Figure 37 Paddock annual nitrogen application rates for Farm 1 50
Figure 38 Paddock annual nitrogen application rates for Farm 2 51
Figure 39 Paddock annual nitrogen application rates for Farm 3 51
Figure 40 Monthly mass of nitrogen irrigated 53
Figure 41 Monthly rainfall totals and median soil moistures 53
Figure 42 Estimated monthly mass of phosphorus irrigated 53
Figure 43 Total nitrogen concentration of soil samples taken from the
water allocation across Taranaki and details the technical work done to help support the
implementation of the NPS-FM requirements.
Overview of surface water quantity
Taranaki receives frequent and plentiful rainfall. The amount of rainfall is extremely variable however,
increases significantly from the region’s coastal fringes to areas of higher elevation across the eastern hill
country and the slopes of Taranaki Maunga. Much of this rainfall rapidly flows to the sea via rivers
Notices. These applications are currently sitting with the Council, who
are continuing to liaise with NPDC regarding the situation.
0
10
20
30
40
50
60
70
80
90
0
10
20
30
40
50
60
70
80
90
Vo
lu
m
e
(m
³/
da
y)
Ra
in
fa
ll
(m
m
/d
ay
)
Daily Rainfall at Motunui (mm/day) Onaero SPS Consented Maximum Flow
page
11
In the 2022-2023 period, the Council was not required to undertake
(NPS-FM) regarding water quantity and specifically the requirements to
set environmental flows and levels, and associated limits. The memorandum also provides information on the
current state of water allocation across Taranaki and details the technical work done to help support the
implementation of the NPS-FM requirements.
Overview of surface water quantity
Taranaki receives frequent and plentiful rainfall. The amount of rainfall is extremely variable however,
increases significantly from
Mangati Catchment Joint Annual Report 2022-2023
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