Eltham
WWTP now occur only as a result of high rainfall events that exceed the storage capacity of the primary and
holding ponds, and the pumping capacity of the reticulated system to Hawera.
Analysis of the primary pond effluent was not required during the monitoring period, although the
condition of the pond and any associated odour continues to be monitored during routine inspections.
Along with a visual survey of the primary pond and surrounds, dissolved oxygen (DO) levels and the
Trustpower Ltd Patea HEP Scheme Monitoring Programme Annual Report 2020-2021
Assessment of environmental effects - application for resource consent, Stratford wastewater treatment plant.
airflows prevail
and sea breezes occasionally occur along the coast during summer.
The mountain and ranges have a strong influence on rainfall in the area by attracting
orographic type events which are often associated with frontal systems and depressions
moving through the Tasman Sea. Annual rainfall on the upper slopes of the northern
Egmont National Park ranges from 1500 to 5000mm.
Although the annual totals are quite high, the way in which rainfall is delivered is more
significant. Also
airflows prevail
and sea breezes occasionally occur along the coast during summer.
The mountain and ranges have a strong influence on rainfall in the area by attracting
orographic type events which are often associated with frontal systems and depressions
moving through the Tasman Sea. Annual rainfall on the upper slopes of the northern
Egmont National Park ranges from 1500 to 5000mm.
Although the annual totals are quite high, the way in which rainfall is delivered is more
significant. Also
de-silted on an as required
basis. The second larger pond is unlined.
The size of the pond provides storage for a 10% annual 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).
A the time of the application it was
5.5K 1,350
5 An 88-year rainfall record tumbled at Dawson Falls on
Taranaki Maunga during July, with the highest 24-hour
rainfall total since 1933. Details and more maps here:
https://www.trc.govt.nz/…/monthly-rainf…/july-2021-
rainfall/... (more)
[Taranaki Regional Council]
5.5K 426
Executive, Audit & Risk Committee - Financial and Operational Report
12
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6 Give yourselves a pat on the back New Plymouth! Your
trapping
can be found in
Stark and Fowles (2006).
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Figure 1 SEM beach bathing bacteriological survey sites
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4. Results
From 1 November 2012 to 27 March 2013 a total of 13 samples were collected at each
site for the purpose of state of the environment monitoring (SEM). Whenever possible,
no SEM sampling was undertaken within three days following significant river
freshes. However, occasionally sampling was affected by localized rainfall and
rainfall or freshwater.
The guideline MfE ‘Action’ mode is reached when enterococci counts in two consecutive
samples exceed 280 enterococci cfu/100 ml. No site reached Action mode during the 2014-
2015 season and no individual sample exceeded 280 enterococci cfu/100 ml.
Mann-Kendall tests were performed in order to assess long term trends in microbiological
water quality. Two sites show a significant decrease in median enterococci counts over the 13-
20 years monitored (Fitzroy and
Ordinary Council Agenda May 2024