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
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
generally very good. It is noted that the protocol for sampling has changed in the last couple of years so that samples are collected irrespective of weather or tide, unlike previously where samples were collected around high tide in fine weather only. Prolonged and/or heavy rainfall will often result in high levels of enterococci in the samples as these are washed down flooded streams and rivers from farmland. This can be exacerbated by a low tide where a sea sample collected from a site near a
during the year (four relating to high rainfall, and one relating to a potable water leak). All of these incidents were deemed compliant with consent conditions upon further investigation. There were also 19 wastewater incidents that occurred throughout the wider wastewater network; 12 of which were related to high rainfall that occurred in November and December in 2020. One incident occurred when a contractor left a pipe plug in the sewer following maintenance, which resulted in an overflow
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.
measured and achieved. In first iteration plans, it will also be particularly difficult to meet many of these ‘musts’, rather it will be a case of making incremental progress over time. • The E.coli component of the NOF is problematic. The E.coli grade is based on the lowest scoring area across four different criteria. One of these – the 95th percentile – is highly influenced by heavy rainfall. In a region like Taranaki, where such rainfall is common, achieving the improvements
............................................................................................................................. 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
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
infiltration expenditure during the 2021-2022 monitoring year consisted of: • $3,325 spent on pipeline renewals • $891 spent on CCTV. The expenditure for pipeline renewals was entirely on project management, investigation and design. No construction occurred. A wastewater network modelling project is underway which uses rainfall and flow data to create a calibrated digital model of the entire Inglewood wastewater network. The calibrated model will be used to assess network performance