information on the hydrogeology of the Taranaki
region presented in this section is from TRC (1996) and/or Stevens (2001).
3.1 General overview
Knowledge of the climate, landforms, and geology is required to understand a
region’s hydrogeology.
Taranaki’s rainfall patterns are closely related to elevation and exposure to the main
rain-bearing northerly to westerly winds. Rainfalls averaging less than 1,600 mm/year
occur only in the southern part of the region and on a narrow coastal strip of
Figure 2 Depth of sites selected for inclusion in the 2011-12 survey (m
below ground level) 6
Figure 3 Average annual rainfall volumes for Taranaki 2008 to 2013
(TRC) 9
Figure 4 Top-rock geology of the Taranaki region (Newsome et al.
2008) 11
Figure 5 Distribution of soil types across the Taranaki region
(Newsome et al. 2008) 12
Figure 6 Distribution of the aquifer units across the Taranaki region
(Brown 2013) 14
Figure 7 Dairy statistics for the Taranaki region (2002 to
does or does not affect the current and future
allocation of water upstream of the dam.
Conditions 4 to 8 define the minimum flow that is to be maintained in the Patea River
downstream of the dam, and allows for a lower minimum flow when less than normal
rainfall reduces inflows.
Conditions 9 to 12 define the minimum and maximum allowable lake levels for winter
and summer periods, specifies the required spillway gate settings during a high lake
level, and allows for some flexibility in
Executive Audit and Risk Agenda October 2023 web v
Executive Audit and Risk Agenda October 2023
Executive Audit and Risk Agenda October 2023
the region’s rivers, streams
and wetlands.
page
2024/2034 Long-Term Plan 5 Consultation issues
Issue 3: Addressing climate change
As the impacts of climate change
intensify, we are considering how
we can best support climate
action in Taranaki.
What the issue is
Climate change will have wide-ranging impacts on
Taranaki. Temperature is expected to increase by
between 0.5°C and 1.5°C by 2040, while rainfall will
become more variable, increasing both the
that can be diverted, while conditions 2 and 3 clarify how this allocation
of water does or does not affect the current and future allocation of water upstream of the dam.
Conditions 4 to 8 define the minimum flow that is to be maintained in the Patea River downstream of the
dam, and allows for a lower minimum flow when less than normal rainfall reduces inflows.
Conditions 9 to 11 define the minimum and maximum allowable lake levels for winter and summer periods
and allows for some
define the minimum flow that is to be maintained in the Patea River downstream of the
dam, and allows for a lower minimum flow when less than normal rainfall reduces inflows.
Conditions 9 to 11 define the minimum and maximum allowable lake levels for winter and summer periods
and allows for some flexibility in lake levels to allow for a short term electricity shortage. When such a
shortage occurs, the consent holder is required to notify Council, and provide an explanation.
Condition 12
downstream of the dam, and allows for a lower minimum flow when less than normal
rainfall reduces inflows.
Conditions 9 to 12 define the minimum and maximum allowable lake levels for winter
and summer periods, specify the required spillway gate settings during a high lake
level, and allows for some flexibility in lake levels to allow for a short term electricity
shortage. When such a shortage occurs, the consent holder is required to notify
Council, and provide an explanation.
Condition 13