Activity 4...................................................................................................................................................................... 16
Maths ...................................................................................................................................................................... 16
Taranaki Regional Council monthly rainfall and river report ................................................................................ 17
for
page
Month May June July August September October November December January February March April April
Days in Month 31 30 31 31 30 31 30 31 31 28 31 30 30 Pad area m
2
Runoff m
3
Uruti Virtual Climate Station 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 52.65 878.60 Rainfall Pad 1 7,765 1 7765 0.25 1.94
Kaka Road Climate Station Rainfall mm Average 205.40 194.90 199.20 196.50
devices outlet structures.
page
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Hayden Easton Final
4.3 I reviewed rainfall records provided by the TRC for the automated
rainfall monitoring station Uruti @ Kaka Road1. Figure 1 below presents
the hourly rainfall totals two weeks prior to and on the day of my site
visit.
Figure 1: Cumulative rainfall recorded at the Taranaki Regional Council
operated rainfall station (Uruti @ Kaka Road) two weeks prior to my site
visit conducted on 4 February 2021.
.................................................................................................................................................. 8
2.3 CLIMATE .................................................................................................................................................... 8
Table 2: Kaka Road Rainfall Events 2011-17 ............................................................................................. 10
Table 3: High Intensity rainfall data (NIWA) for site ................................................................................ 10
2.4 HYDROLOGY / HYDROGEOLOGY
3.1 Water balance method.............................................................................................9
3.2 Site Selection.........................................................................................................10
3.2.1 Rainfall and potential evapotranspiration .................................................10
3.2.2 Soil Types.................................................................................................. 11
3.3 Irrigation
d) Construction timetable for the erosion and sediment control works and the bulk earthworks
proposed;
e) Maintenance, monitoring and reporting procedures;
f) Rainfall response and contingency measures including procedures to minimise adverse effects in
the event of extreme rainfall events and/or the failure of any key erosion and sediment control
structures;
g) Procedures and timing for review and/or amendment to the erosion and sediment control
measures listed in the ESCP; and,
daily average results fell
into the Ministry's 'excellent' or 'good' categories and 41% of the results met the 'acceptable'
category. Six daily results from the total 138 of days monitored fell into the ‘alert’ category. It
is noted that all of those six results happened during moderate to heavy rainfall events, and
in the majority of cases, during fresh onshore winds. These findings confirm those of the
previous inhalable particulate surveys that found sea salt spray to be a major PM10 source.
trend analysis of median enterococci data at Ohawe Beach 44
Figure 36 Average rainfall data for Taranaki, 1 November 2019 to 31 March 2020 45
Figure 37 Box and whisker plots of all SEM enterococci data at all sites during the 2019-2020 season
presented on a logarithmic scale (see Table 4 for site codes) 47
List of photos
Photo 1 Onaero Beach 11
Photo 2 Waitara East Beach 14
Photo 3 Waitara West Beach 17
Photo 4 Bell Block Beach 20
Photo 5 Fitzroy Beach 22
Photo …
boundary – bank erosion
page
i
Table of contents
Page
1. Purpose 1
2. Introduction 1
3. Background 1
3.1 Ring plain 1
3.2 Elevation 2
3.3 Stability 3
3.4 Rainfall 3
3.5 Run off 4
3.6 Channels 4
4. Legal status and background 6
4.1 Ownership 6
4.2 Control 6
4.3 Land ownership 6
4.4 Catchment authorities 7
4.5 Regional Water Boards 7
4.6 Control of gravel extraction 7
5. Geology 8
6. Watercourses 9
7. Event/effect relationship 10
(the Council) to assess the environmental
performance during the period under review, and the results and effects of the consent
holder’s activities.
The Council’s monitoring programme included three regular inspections, one additional
inspection, and two biological receiving water surveys. Three short duration overflows (four
to nine days) following prolonged and intensive rainfall events, occurred between mid April
and late June 2015.
Regular inspections indicated no problems