9.9
Dissolved zinc g/m3 <0.005 <0.005 <0.005 <0.005
As with previous results, the discharge from the culvert below the landfill exhibits
leachate contamination as indicated by the high levels of conductivity, alkalinity, iron,
manganese, ammoniacal nitrogen and ammonia.
With the exception of nitrate/nitrite nitrogen, the levels of contaminants found 130 m
downstream of the discharge (at site AWY000105) are far lower, indicating that the
intervening wetland is being effective at
vegetation
Taranaki’s indigenous vegetation ranges from alpine herb fields to temperate rainforests. It also includes
coastal turf and dune vegetation. Like most of New Zealand, Taranaki would once have been covered in thick
and diverse forest and shrubland, with smaller areas of wetland vegetation and turf communities.
Throughout New Zealand, much of the land cleared for development was in low-lying and coastal areas.
Such is the case in Taranaki where approximately 60% of the pre-human
wastewater plant as it existed prior to the new pipeline diversion is
illustrated in Figure 1. Reconfiguration of the wetland to act as a storage pond was
undertaken following full diversion of wastes to the Hawera pipeline.
page
8
Figure 1 Schematic layout of Eltham WWTP as operational prior
to the diversion of wastewater to the Hawera WWTP in
the 2010-2011 period.
The primary pond was de-sludged during the 2006-2007 monitoring year with the de-
watered sludge
and Papamoa. The Waiwhakaiho River mouth, the
wetlands and associated water bodies were important because of resources such as raupo,
C60 Waiwhakaiho River Mahinga kai Map Link
Map - 12
annotation https://maps.trc.govt.nz/LocalMapsViewer/?map=6f0f4492c76244d5ace0422efa7e6b0c%20&MapExtentID=12 https://maps.trc.govt.nz/LocalMapsViewer/?map=6f0f4492c76244d5ace0422efa7e6b0c%20&MapExtentID=12
page
200
CO AS TAL P L AN F O R TARANAK I S chedu le 5 – H i s
eight groundwater monitoring points (MPs) are depicted in Figure 1 and Figure 2 and
described in Table 5. The four points near the plant are positioned approximately in a straight line running
upslope (southward) from the Waitotara River towards the wetland which used to receive overflow from the
wastewater holding ponds (pre 1999). The remaining points are downslope of the Longview Farm irrigation
area.
MP1 is the spring from which water is drawn for stock and yard washing. The other five
pond capacity is
to remain unchanged but the pond will be modified to include multi-facet treatment including pools,
marshlands, and forebays, with wetland vegetation introduced to treat stormwater prior to discharge to land
where it may enter surface water. Although Council cannot comment on or assess the effects of this proposal
on mana whenua values, given the applicant’s proposed mitigations and offsetting measures, and assessment
of the iwi management plans of Ngāruahine and Ngāti Ruanui
holder should
explain why he or she has
not done so.
18. Require decision makers to
assess the effects of a
discharge to water against
the state that water should
be in, not its current,
degraded state.
19. Encourage and support the
restoration of wetlands and
riparian areas, where
materials within a wider catchment for
future generations.4 Proposed resource
consent conditions would not limit the
volumes on any of the waste accepted.
Marlene Benson asked TRC whether there
plant can inhabit riparian and forest margins,
scrub-land, production and regenerating indigenous
forests and degraded pasture.
Once established it forms dense clumps, which exclude
and/or compete with other plant species for soil
moisture, nutrients and light. Giant reed represents a
particular threat to indigenous biodiversity values
along riparian, wetland and forest margins and can also
cause problems in recreational areas and by
obstructing drainage
plant can inhabit riparian and forest margins,
scrub-land, production and regenerating indigenous
forests and degraded pasture.
Once established it forms dense clumps, which exclude
and/or compete with other plant species for soil
moisture, nutrients and light. Giant reed represents a
particular threat to indigenous biodiversity values
along riparian, wetland and forest margins and can also
cause problems in recreational areas and by
obstructing drainage
monitoring programmes for water quality, ecological
health, and periphyton proliferation are continuing. A presentation to an
international conference has been accepted. NIWA and TRC are exploring
collaborating in a potential constructed wetland project.
Engagement in “Envirolink” and other science
research opportunities, to enhance knowledge base
for policy development and implementation.
Projects with clear relevance and benefit to Taranaki
to be adopted