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 (2021-2022) 12
Figure 4 Location of intertidal survey sites in relation to the outfall 13
Figure 5 Mean number of species per quadrat for summer surveys (1986-2022) 14
Figure 6 Mean Shannon-Weiner Indices per quadrat for summer surveys (1986-2022) 14
Figure 7 Location of shoreline water
and coastal receiving
environments including rivers, lakes and estuaries.
Climate change is expected to exacerbate soil loss and present challenges to the future
management of erosion-prone land. It is estimated that extreme storm events resulting in
flooding and slips are likely to occur somewhere in Taranaki about once every five to six
years. In coming years, the region is expected to experience more frequent and intense
heavy rainfall events, increasing both the frequency and
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Document Number: 1551853
Taranaki June 2015 Flood Event
Taranaki Regional Council
Private Bag 713
STRATFORD
June 2016
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Document Number: 1551853
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Document Number: 1551853
Summary
The key points to be taken from the Taranaki June 2015 Flood Event are:
A high intensity rainfall event occurred between the 19-20 June and was concentrated
on
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Month May June July August September October November December January February March April
Evaporation mm Average 31.12 21.41 25.43 39.04 57.48 85.05 109.32 126.01 134.46 107.97 88.65 52.65 878.60
Rainfall mm Average 181.20 189.51 181.83 178.04 175.35 188.38 149.39 149.04 120.00 107.02 119.22
......................................................................................... 50
8.0 REFERENCES ......................................................................................................... 50
FIGURES
Figure 1 48-hour rainfall totals for the 19–20 June 2015 storm. ................................................................. 2
Figure 2 Flight paths for the two reconnaissance flights undertaken by GNS Science staff on 13
July and 23 July 2015.
2020) 9
Figure 4 Observed groundwater levels GND2102 and rainfall (July 2019-June 2020) 10
Figure 5 Observed groundwater levels GND2102 and abstraction (July 2019-June 2020) 11
Figure 6 Observed groundwater levels GND2103 and rainfall (July 2019-June 2020) 11
Figure 7 Observed groundwater levels GND2103 and abstraction (July 2019-June 2020) 12
Figure 8 Observed groundwater levels GND2119 and rainfall (July 2019-June 2020) 12
Figure 9 Observed groundwater levels GND2119 and …
shall be managed and any stormwater treated in accordance with a finalised
Soil Erosion and Sediment Control Plan that has been approved by the Chief Executive,
Taranaki Regional Council, acting in a certification capacity. This finalised plan shall
conform to the Waikato Regional Council’s Guidelines for Soil Disturbing Activities and
shall detail methodology/ design of stormwater drainage from the cleanfill, and
maintenance of sediment control practices, with a specific focus on rainfall
Ordinary Council Agenda August 2024
moderate temperatures and regular rainfall, but when the rainfall is heavy it can
cause flooding and landslips. In periods of low rainfall, the region can experience droughts. In some parts
of the region, and at certain times of the year, storms and tornadoes are a reasonably frequent occurrence.
Coastal erosion
Coastal erosion is the retreat of the shoreline caused by water currents, waves, and wind. It is a natural
process that can be influenced by human activity. The Taranaki coastline
months,
increased water temperature, reduced rainfall
and increased daylight hours provide ideal
conditions for cyanobacteria to grow, sometimes
resulting in algal blooms. When in bloom,
cyanobacteria can produce toxins that can pose a
risk to the health of people and animals entering
the water.
Sites monitored for benthic cyanobacteria were
suitable for recreational use on 20 of 77 (26%)
routine surveys, and elevated to a cautionary
status during one (<2%) survey. Conditions were