downstream of ‘irrigation’ tributary INH000450
Inaha Stream, State Highway 45 INH000470
page
6
Figure 1 Wastewater irrigation areas, surface water monitoring and point source discharge locations in the Inaha Stream
and tributaries
Stormwater generated in the main yard, garage and raw material reception areas is diverted to a three-
stage stormwater treatment system (near B, Figure 1). The first flush of a rainfall event is discharged to Pond
1 and after that is
................................................................................................ 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
Operations and Regulatory Committee Agenda April 2023
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
Quarries independent groundwater monitoring (blue) and flow gauging sites (orange) 10
Figure 4 Discharge rates from Civil Quarries stormwater system plotted against rainfall in 10 minute
interval totals. The red line is the consented discharge rate limit 14
Figure 5 Abstraction rates from Pond A which is where groundwater from the excavation pit is pumped
into (1 July 2022 to 30 June 2023) 15
page
iii
Figure 6 Biomonitoring sites in the Kurapete Stream in relation to
1 Minimum requirement, 4 hectares per 100 cows, which is designed to ensure nitrogen in the discharge does not
exceed 200 kg/ha/year.
Note: Council expectation is that all consents issued will require an exclusive discharge to land and
full storage. Dual discharges may be allowed, if the dairy farm is in a high rainfall area and provision
of adequate storage is impractical. The discharge of treated farm dairy effluent to surface water may
be authorised as a contingency, when land
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
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