Wairewa / Lake Forsyth plan change to be operative
MEDIA RELEASE
December 9,
2016
Wairewa / Lake Forsyth plan change to
be operative
Environment Canterbury announced
today that Plan Change 6 to the Canterbury Land & Water
Regional Plan, covering the Wairewa / Lake Forsyth
catchment, would be made operative on 1 February 2017.
The Plan Change addresses both water quality and water
quantity issues in the catchment. Environment Canterbury
Councillor Peter Skelton said the main focus is on improving
the health of Te Roto o Wairewa / Lake Forsyth by reducing
the amount of phosphorus-rich sediment entering the
lake.
“Phosphorus is a significant factor in the frequent cyanobacteria blooms that limit use of the lake for recreation and customary food gathering, and can pose a health risk.”
The Plan Change is part of a wider action plan to achieve improvements in the lake and rivers.
“There are environmental flow and allocation limits for the Ōkana, Ōkuti and Takiritawairivers and their tributaries,” Professor Skelton said. “Works in or near these rivers andtheir tributaries in the valley floor to reduce bank erosion are supported, provided they comply with the requirements of a river bank erosion plan and do not reduce carrying capacity.
“There are also rules to allow for the construction of a sediment basin/wetland at the head of the lake, in-lake investigations, opening and closing the lake, water quality limits and targets for the lake and rivers, and requiring all stock to be kept out of waterways onthe valley floor.”
Rules prohibiting stock from using
and disturbing the beds, banks and riparian margins of
rivers and the lake are designed to limit new phosphorus
sediment being released to the lake.
“The stock
exclusion rules apply from 1 January 2020,” Professor
Skelton said. “They permit access to the riparian margin
in some circumstances – where there is existing fencing,
and to allow access for sheep when a consent is granted.
There is no dairy farming in the catchment.”
The Plan
Change recognises the cultural significance of Te Roto o
Wairewa / Lake Forsyth to Ngāi Tahu and support its
restoration.
Environment Canterbury accepted the
recommendations of Independent Hearing Commissioners on
proposed Plan Change 6 in August this year. No appeals were
received. For more information, go towww.ecan.govt.nz/lwrp-pc6
Background
– Plan Change 6
Te Roto o Wairewa/ Lake
Forsyth is a nationally and regionally significant wetland
area. Itprovides lake-margin and swamp habitats for
waterfowl (including the crested grebe) anda variety of salt
and freshwater marsh plants and invertebrate species.
The
lake and its tributaries provide habitats for a variety of
fish species including eel/tuna, whitebait/inanga,
flounder/pātiki, banded kōkopu, and common and upland
bullies. TheŌkuti River is a spawning site for the
lamprey/ kanakana. Perch and brown trout can also befound in
the lake.
Te Roto o Wairewa/ Lake Forsyth is a tribal
taonga (treasure) for Kāti Irakehu and KātiMakō. It is a
source of mahinga kai (traditional food gathering) and
famous for its eel /tuna which provide sustenance for mana
whenua.
The 5.6 square kilometre shallow coastal lake is
less than 20 metres above sea level anddrains to the sea
through a gravel barrier.
The growth of Kaitorete Spit
has enclosed the lake, which was previously a
shallowestuary. Deforestation of the catchment has
accelerated the natural process of erosion,and subsequent
loss of naturally rich phosphorus soils into the lake.
Degraded water quality leads to summer blooms and cloudy
water. The catchment is also prone toflooding.
The Banks
Peninsula Zone Committee recognises the work of the
WairewaRūnanga in seeking solutions to poor water quality
in the lake, and reversing thedecline of eel/tuna. It
identified Te Roto o Wairewa / Lake Forsyth as one of its
flagship biodiversity projects.
A community-driven plan
for the catchment was started in 2012 and led to
thedevelopment of the Zone Committee’s Zone Implementation
Programme. The aim of the programme is to improve the
lake’s water quality and mahinga kai and contact
recreation values, and to manage water quantity in the
catchment’s rivers.
Plan Change 6 represents the
regulatory part of the Zone Committee’s
programme.
Background – Land & Water Regional
Plan
Plan Change 6 mainly focuses on reducing
sediment and phosphorus losses in the flatter valley floor
where most of the current sediment load to the lake comes
from. The region-wide rules in the Canterbury Land & Water
Regional Plan continue to cover most activities in the
catchment. In particular, the region-wide nutrient
management rules apply in the Wairewa / Lake Forsyth
catchment.
The Land & Water Regional Plan will become
fully operative on 1 February 2017. It sets the framework to
implement community aspirations for water through the
Canterbury Water Management Strategy, a community led,
collaborative approach to improve water outcomes throughout
the region.
The Land & Water Regional Plan operates at
two levels – a region-wide section and 10 sub- regional
sections. The policies and rules in the sub-regional
sections can apply instead of, or in addition to, policies
and rules in the region-wide section. The sub-regional
sections implement the region-wide objectives in the plan in
the most appropriate way for the catchment.
For more information on the Land & Water Regional Plan, go to www.ecan.govt.nz/lwrp