CDEM Joint Committee March 2024
CDEM Joint Committee March 2024
CDEM Joint Committee March 2024
https://www.nems.org.nz/documents/water-quality-part-3-lakes/ page Technical Memorandum | Draft Baseline State for Escherichia coli and Cyanobacteria (Planktonic) in Taranaki Rivers and Lakes year at 40 popular primary contact sites, including a range of beaches, rivers and lakes around Taranaki. There are 23 freshwater sites (i.e. rivers and lakes) included in the current CISH programme. The monitoring results highlight the impact that rainfall has on recreational water quality. Escherichia coli concentrations can be
presently under significant pressure. While there may be an increase in demand as people look to move away from less secure surface water sources, this is not expected to place groundwater under significant pressure in the short to medium term. As expected, monitored groundwater sites display fluctuations in water level as a result of seasonal variations in rainfall recharge. The magnitude of these changes varies considerably by site, ranging from a few millimetres up to several metres. The …
a week between 1 November and 31 March each year at 40 popular primary contact sites, including a range of beaches, rivers and lakes around Taranaki. There are 23 freshwater sites (i.e. rivers and lakes) included in the current CISH programme. The monitoring results highlight the impact that rainfall has on recreational water quality. Escherichia coli concentrations can be significantly elevated at primary contact sites for up to three days following heavy rainfall. This is owing to the
Description Appendix C: HEC-HMS Model Description Appendix D: HEC-RAS Model Description Appendix E: Calibration Background Appendix F: Calibration Appendix G: Design Rainfall Appendix H: Inflow Design Flood Appendix I: Canal Erosion Assessment Appendix J: Hydraulic Model Result Maps page AUCKLAND 4 Fred Thomas Drive, Takapuna, Auckland 0622 PO Box 100253, North Shore, Auckland 0745 Tel: +64 9 489 7872 Fax: +64 9 489 7873 RILEY CONSULTANTS LTD New Zealand Email:
produced water is disposed of by deep well injection. Stormwater from the production station is collected and discharged at three separate points. The water level in the firewater pond in the north western corner of the site is maintained by an abstraction from the Ngaere Stream. Overflow due to rainfall entering this pond is discharged to land and to the Ngaere Stream to the north of the pond. Stormwater from the process areas is directed to a large API separator system to the north east of
discharge of stormwater and wastewater onto and into land and into an unnamed tributary of the Kahouri Stream. During the monitoring period, Fletcher Concrete and Infrastructure Ltd (Fletcher Concrete) demonstrated a good level of environmental performance and high level of administrative performance. There was a breach of consent conditions identified from sampling undertaken during a heavy rainfall event. Levels of total suspended solids exceeded those allowed for in condition 7.
Operations and Regulatory Committee Agenda April 2023
exceedance rainfall event (AEP) event. The maximum discharge rate from the pond during large rainfall events is 1,060 L/s as this is dictated by the size of the outfall pipe (750 mm). However, there is also provision for the pond to overflow via a spillway structure to a discharge swale (i.e. bypassing the 750 mm discharge pipe). At the time of the application it was indicated that, as a result of stormwater inputs to the pond, the discharge rate from the pond to the Mangorei Stream would be
discharge point and receiving waters in the Herekawe Stream. Scheduled inspections were carried out on 20 July 2022, 8 December 2022, 26 January 2023 and 6 June 2023. Notes from these visits are summarised below. 20 July 2022 On site 14:00 to 15:00 with Corteva staff. Weather was cloudy with a moderate northerly wind. 18 mm of rainfall had been recorded over the previous week at the Brooklands Zoo station. Nīkau Contractors had commenced demolition of the above ground structures. The site