and detaching or detached mats accumulating on the river’s edge triggered the
‘Alert’ level at the same four sites (Waingongoro River at Ohawe, Kaupokonui River at the mouth, and
Waiwhakaiho River at the last riffle and at Merrilands Domain) on a total of 8 surveys. Levels of
cyanobacteria were higher than in the previous season; and lower than the preceding three seasons,
probably a reflection of the relative amounts of rainfall causing freshes that scour streambeds of
in this high rainfall area is being investigated. The
requirement to discharge to land, in most cases, addresses cultural and water
quality concerns.
Recommended
That the Taranaki Regional Council:
a) receives this memorandum
b) agrees that from December 2022 consent holders applying for a consent renewal
will be required to immediately start discharging to land once their consent has
been issued
c) agrees that those consent holders whose consents are about to expire be
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
Ordinary Council Meeting Agenda 5 April 2022
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
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
northwestern corner of the site is maintained by abstraction from the
Ngaere Stream. Overflow due to rainfall entering this pond is discharged to land and to the Ngaere Stream
to the north of the pond. Stormwater from the process areas is directed to a large API (American Petroleum
Institute) separator system to the northeast of the site. The effluent from this separator is discharged to a
small unnamed tributary to the east which joins the Ngaere Stream approximately 40 m above its
confluence with
Revised Assessment of Environmental Effects (AEE) - June 2020
State of the Environment Report 2015
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