the rainfall recorded at the Council’s monitoring locations ranged
between 100 % and 158% of historical mean values. This meant that many rivers and streams were running
above mean annual low flow conditions for the period. The higher than normal stream flows meant that
there was only a small amount of monitoring required to ensure ecological flows were maintained in those
waterways being used to supply water for irrigation. During the period under review, compliance with
residual flow
cover is linked to a shift of storm tracks southward and dry tropical zones
expanding.
Rainfall: The report covers average rainfall by season, and trends in rainfall within each
season. It also presents information on trends in intense rainfall episodes. The report goes on
to note that climate change modelling suggest there will be an overall pattern of increasing
rainfall in winter and spring down western New Zealand and across the south of the South
Island, with drier conditions to the
boundary during any of the four routine inspections.
Results of effluent monitoring
With the diversion of wastes to the Hawera WWTP in the 2010/11 period, discharges from the Eltham
WWTP now occur only as a result of high rainfall events that exceed the storage capacity of the primary and
holding ponds, and the pumping capacity of the reticulated system to Hawera.
Analysis of the primary pond effluent was not required during the monitoring period, although the
condition of the pond and
Fonterra Kapuni Annual Report 2023-2024
relation to best practice irrigation onto high and low risk soils.
1.6 Application Depth
The volume of water applied during irrigation is referred to as the application depth. Farmers will make
reference to the amount of rain in their rain gauge in mm. For example, there was 4 mm of rainfall
yesterday. This relates to the formula 1mm of rain falling on 1 ha equals 10,000 litres. Using the example of
4mm of rainfall, this would equate to 40,000 litres of rain falling on each ha of land.
............................................................................................................................. 10
APPENDIX A MONITORING WELLS- REMEDIATION NEW ZEALAND- URUTI .......... 11
APPENDIX B MONITORING BORE INSTALLATION .................................................... 13
APPENDIX C SOIL MOISTURE AND RAINFALL RECHARGE ON CHLORIDE
CONCENTRATIONS IN GROUNDWATER ............................................. 15
APPENDIX D PRELIMINARY UNCONFIRMED CONCEPTUAL SITE MODEL ............... 1
page
Commercial in confidence
TABLES
Table 2.1:Haehanga Catchment
at the same four sites
(Waingongoro River at Ohawe, Kaupokonui River at the mouth, and Waiwhakaiho River at the last riffle and
at Merrilands Domain) on a total of 13 surveys. Levels of cyanobacteria were higher than in the previous two
seasons, but lower than the preceding two seasons, probably a reflection of the relative amounts of rainfall
causing freshes that scour streambeds of periphyton.
Timely reporting of the results of bacteriological water quality and
plan, prepare and adapt to a changing climate
in Taranaki.
In considering weather and climate we are mainly interested
in sunshine, rain, wind and temperature data. 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
Figure 2 Daily hours where DO is greater than 0 g/m3 in Pond 1 and 2 9
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 (2020-2021) 13
Figure 4 Location of intertidal survey sites in relation to the outfall 14
Figure 5 Mean number of species per quadrat for spring surveys (1992-2020) 15
Figure 6 Mean Shannon-Weiner indices per quadrat for spring surveys (1992-2020) 15
potassium, sulphur,
calcium, magnesium and sodium. This report focuses on the nitrogen loading and losses from the site.
Nitrogen enters the Irrigation Area through the irrigated liquid, rainfall and clover fixation.
Nitrogen leaves the Irrigation Area by being leached below the root zone, by volatilisation and denitrification to
the atmosphere and in the harvested pasture in the form of baleage.
Nitrogen moves between the organic and inorganic pools within the soil. Generally, nitrogen in