................................................................................................ 43
3.1.6 Hot days ................................................................................................... 46
3.1.7 Growing degree days ............................................................................... 49
3.2 Rainfall .................................................................................................................... 52
3.2.1 Rainfall totals ........................................................................................... 52
3.2.2 Dry
(NPS-FM) regarding water quantity and specifically the requirements to
set environmental flows and levels, and associated limits. The memorandum also provides information on the
current state of water allocation across Taranaki and details the technical work done to help support the
implementation of the NPS-FM requirements.
Overview of surface water quantity
Taranaki receives frequent and plentiful rainfall. The amount of rainfall is extremely variable however,
increases significantly from
Operations and Regulatory Committee Agenda April 2023
Table 11 Summary of performance for consent 10810-1 23
Table 12 Evaluation of environmental performance over time 24
List of figures
Figure 1 Configuration of the HWWTP (adapted from NIWA, 2012) 3
Figure 2 Daily hours where DO is greater 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 (2022-2023) 12
Figure 4 Location of intertidal
page
Doc. No: 3004955
TARANAKI REGIONAL COUNCIL MONTHLY RAINFALL AND RIVER REPORT FOR February 2022
Provisional Data Only
Note: some sites record a number of parameters
Table 1: Rainfall at 27 sites throughout the region
Station Sub-region
Monthly Year to Date
Records Began Number of rain
days (>0.5mm)
Total Monthly
Rainfall (mm)
% of Monthly
Normal (%)
Total to date
(mm)
% of Normal for
year to date
% of average full
calendar year
Nth
This helps
guide decision-making around growing seasons, flood
management, fishing, swimming and surf conditions. River
flows are influenced by rainfall and temperature and tell us
how dry or wet a summer is. River flow measurements can
help us ensure water use is managed in a way that protects
freshwater ecosystem health. Find more information on
river flows in the Water chapter.
Air temperature
Annual mean air temperatures in the region’s main urban
areas
page
Map1: Rain gauge sites
Table 1: Rainfall monthly and year to date totals at 27 rain gauge sites in Taranaki.
July Year to Date
Hydro_Sites
# Zero
Rain
days
Total
Rainfall
(mm)
% of
typical
month
Total to
date (mm)
% of typical
year to date
% of typical
full year
Records
Began
North Egmont at
Visitors Centre 6 1196.0 179.9 4111.000 113.9 61.1 1991
Dawson Falls 4 1418.5 296.4 4521.000 178.9 100.5
page
Taranaki Regional Council Monthly Rainfall and Environmental
Data Report for August 2022
02 September, 2022
Provisional Data Only. Note: some sites record a number of parameters
1. Rain gauge values throughout the region
Note: Taranaki co-owns rain-gauges with Horizons, so we can assess rainfalls right-out
over the Eastern Hill Country.
Map1: Rain gauge sites
page
Table 1: Rainfall monthly and year to date totals at 27 rain gauge sites in
page
Map1: Rain gauge sites
Table 1: Rainfall monthly and year to date totals at 27 rain gauge sites in Taranaki.
June Year to Date
Hydro_Sites # days >
0.5 mm
Total
Rainfall
(mm)
% of
typical
month
Total to
date (mm)
% of typical
year to date
% of typical
full year
Records
Began
North Egmont at
Visitors Centre 8 658.0 98.4 2915.0 99.0 43.4 1991
Dawson Falls 5 906.0 191.2 3102.5 151.4 68.9 1933
Kahui
Mangorei Hydroelectric Power Scheme - Hydrology ReportHydrology Report
Trustpower Ltd
November 2020 (Final)
Job No: 1008726.200
Table of contents
1 Introduction 1
1.1 Context 1
1.2 Scope of assessment 1
1.3 Scheme description and key locations 1
2 Catchment characteristics and water resources 5
2.1 Waiwhakaiho catchment 5
2.1.1 Drainage and geology 5
2.1.2 Catchment area and cover 5
2.1.3 Rainfall 6
2.2 Hydrometric data 6
2.3 Water use in the catchment 7
2.4 Waiwhakaiho River flows