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September 2020 Rainfall
millimetres
VALUE
0-50
51-100
101-150
151-200
201-250
251-300
301-350
351-400
401-450
451-500
501-550
551-600
601-650
651-700
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September 2020 Year to Date RF
millimetres
0-300
301-600
601-900
901-1200
1201-1500
1501-1800
1801-2100
2101-2400
2401-2700
2701-3000
3001-3300
3301-3600
3601-3900
3901-4200
September 2020 rainfall …
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July 2020 Rainfall
millimetres
0 - 50
51 - 100
101 - 150
151 - 200
201 - 250
251 - 300
301 - 350
351 - 400
401 - 450
451 - 500
501 - 550
551 - 600
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July 2020 Year to Date Rainfall
millimetres
0 - 250
251 - 500
501 - 750
751 - 1000
1001 - 1250
1251 - 1500
1501 - 1750
1751 - 2000
2001 - 2250
2251 - 2500
2501 - 2750
2751 - 3000
July 2020 rainfall - monitored sites
Waiwhakaiho and Bell Block and as such signage remains in place at these locations to advise
against collecting shellfish.
There were eight unauthorised incidents that occurred at the NPWWTP during the year; three due to
blockages, two due to heavy rainfall, and three due to operator errors. Four events were recorded for sewer
pump stations (all due to high rainfall), and a further 15 reticulation overflows (the majority of which were
due to high rainfall or blockages due to fat and/or wet
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June 2020 Rainfall
millimetres
0 - 75
76 - 150
151- 225
226- 300
301 - 375
376 - 450
451 - 525
526 - 600
601 - 675
676 - 750
751 - 825
826 - 900
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June 2020 Year to Date Rainfall
millimetres
0 - 150
151 - 300
301 - 450
451 - 600
601 - 750
751 - 900
901 - 1050
1051 - 1200
1201 - 1350
1351 - 1500
1501 - 1650
1651 - 1800
1801 - 1950
1951 - 2100
2101 - 2250
2251 - …
by NPDC assessed for compliance upon receipt.
The monitoring showed that the activities were generally being carried out in compliance with the
conditions of the resource consent. The results of surface and groundwater quality monitoring undertaken
show no adverse effects of the activity on local fresh water resources. Site visits undertaken found the site
to be tidy and well managed.
During this monitor year, following higher than average rainfall the minimum separation distance
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
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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