Area grade: C
What makes up this grade?
The overall grade is made up of five indicators:
Water quality: Water samples are tested for temperature,
oxygen concentration, turbidity and the levels of pH, ammonia and nutrients
(nitrogen and phosphorus). The results of this testing are compared against
guidelines for Auckland to produce a water quality index.
Flow patterns: This involves monitoring the hydrologic
connectivity of the river to upstream and downstream reaches and the floodplain
using the Stream Ecological Valuation (SEV), which is a method of assessing the
ecological health of our rivers.
Nutrient cycling: This involves monitoring the inputs and
processing of minerals, particulates and contaminants using the SEV
Habitat quality: This involves monitoring the diversity and
quality of habitats using the
SEV habitat provision functions.
Biodiversity: Field assessments and samples are collected to
assess the type and amount of native plants and animals using the SEV
- The reporting area covers 633KM2 representing 12.9% of the region – the third largest reporting area
- The land cover is mainly pastoral vegetation (63%) but also contains large areas of native vegetation (20%) and exotic vegetation (15%)
- The extent of impervious surface (hard surfaces) is the lowest of any
reporting area (1%) and is much lower than the regional average of 9%
Monitoring background and interpretation
Auckland Council’s State of the Environment (SoE) monitoring programme has
been building a record of Auckland’s environment for more than 25 years. This
information is critical to the effective management of Auckland’s natural
environment, after all, you can’t manage what you don’t monitor.
The monitoring programme shows there is a strong relationship between the
health of rivers and the type of land cover in the surrounding catchment. Rivers
that drain through forested catchments (particularly native forests) typically
have excellent water quality and ecology, while rivers that drain from urban
catchments typically have poor water quality and ecology.
The Wellsford reporting area is predominantly pastoral, but large forested
areas still remain. As a result, the health of the area’s rivers is considered
to be above average. Rivers in this area tend to have riparian margins with some
trees and bush, which provide shade, leaf litter and woody debris to the stream
and anchor the stream banks. The debris enhances the quality of habitat for
flora and fauna, although some of the original riparian vegetation has been
removed to allow more intensive land use. The low level of urban development
means there is little channel modification or pollution from discharges or
stormwater, although there may be diffuse sources of contaminants from the
pastoral land use and physical damage from stock access.
Wai Care Rodney
Wai Care is a water quality education, monitoring and action programme
managed by Auckland Council, for schools and community groups in the Auckland
The programme aims to educate people about freshwater issues and encourage
and facilitate action in the local community, from water quality monitoring to
planting and litter clean-ups.
The following table shows achievements of the Wai Care Programme in Rodney
the 2015/2016 financial year.
|Students involved in education||1943||11118|
|People involved in action||555||4217|
|Native trees planted||970||28577|
For more information on Wai Care,
or to view site data for your area, go to waicare.org.nz
or call 09 301 0101 and ask for Wai