3 September 2013
Chatham Rock Phosphate today
refuted the misinformation media campaign being run by the Deep Water Group and
questioned fish trawling’s environmental record.
In media articles George Clement
of the Deep Water Group has described Chatham’s proposal to extract rock
phosphate as a potential environmental “catastrophe”.
“Such descriptions could be
applied to fishing, when you think about the vast area of sea floor trawling
disturbs,” Managing Director Chris Castle said.
"Chatham's planned 15-year extraction project will touch a total of 450 km2, far less than 1% of the Chatham Rise. Mr Clement estimates that's about sevent times the size of Wellington harbour.
“In contrast, over the same
period fishing will bottom trawl 750,000 km2, about three times the size of
New Zealand. Year after year, weighted nets scrape 50,000 km2
of seabed, with bottom-dwelling animals disturbed or destroyed. Up to 3000 km2 of new territory is
disturbed annually - an environmental impact 100 times greater than predicted
for phosphate extraction.”
Mr Castle said Chatham has talked
to the DWG for three years.
“We’ve given them huge amounts of
information, scientific reports and models showing temporary and very localised
impacts on adjacent sea floor and water column. At their request we paid for an
independent review of the modelling. They expressed
cautious support for our project for most of that period. Recently the attitude
of some members has changed, with no willingness to discuss their concerns.
“We wouldn’t consider extracting
phosphate nodules from the Chatham Rise if it caused more than very minor
environmental impacts.”
He said Chatham’s operations
simply lift the top 30cm of sandy silt and redeposit 85% of it carefully on the
same seabed after extracting the nodules – the net effect is selected areas of
seabed are lowered about 5cm. Modelling indicates the material returned will
not be widely dispersed, and the sediment that doesn’t immediately settle will
rapidly dilute to insignificant levels.
“Our draft environmental impact
assessment (EIA), supported by 30-plus expert reports, has identified no
long-term impacts on key spawning, juvenile and young fish habitat. Any
potential impacts are confined to our limited extraction areas, and are
short-term, reversible, and of low environmental risk. “
He also notes the fundamentals of Chatham’s proposed
method are routinely used in dredging around the world. The only new aspect is undertaking this work
at 400m. The operations will
be intermittent (3 days in every 10 day cycle) and spread among geographically
separate locations within the licence area.
“But while bottom trawling –
ploughing vast tracts of the EEZ seabed decade after decade - requires no
environmental consents, our project needs a mining licence and a marine
consent. These cost millions of dollars, require years of research, consultation
and official process, and involve full public scrutiny.
“The annual fish trawl footprint
on just the Chatham Rise during the
2009-10 fishing year was 19,051 km2.
As hoki spawning and growth occurs over the entire 189,000 km2 Rise, DWG already know they can
continually bottom-trawl 10% of the area without harming juvenile fish stocks,
so Chatham’s extra annual 30 km2
is of little
significance.”
Mr Castle said New Zealand is
predicted to be $900 million richer as a result of the new phosphate industry
and Chatham will be generating annual exports or import substitution of $300
million, plus supporting farming, our biggest earner.
By area, the economic value of
the phosphate resource is 500 times greater than fishing; expected to yield $9.1 million per km2. Bottom trawling yields less than $20,000 per km2.
“The benthic protection areas, of
which the fishing industry is so proud, were established to preserve areas of
sea floor not already affected by bottom trawling. They were determined without
considering the economic importance of resources such as rock phosphate.
“Thanks partly to Chatham’s $20 million
investment, the Rise benthic environment is now one of the best known parts of
our marine territory, and can now inform resource and environmental management
decisions, possibly including modifying those benthic areas.
“We’ve
spent three years collecting data on oceanographic conditions (tides, currents,
turbidity), benthic life, and analysing the impacts of disturbances on the
seafloor and in the water column so we can minimise impacts and protect areas of benthic habitat.”
Mr Castle said this project is important to provide fertiliser
security for farming. Most rock
phosphate used to make fertiliser now is imported from Morocco. It’s high in cadmium, involves high
transport costs and has a significant carbon footprint.
Chatham Rise rock phosphate, as an ultra-low cadmium
direct-application fertiliser, has proven to be as effective as processed
fertilisers while reducing run-off effects on New Zealand waterways by up to
80%.
Rather than being an “environmental catastrophe”, it’s a project of national significance offering
significant economic and environmental benefits.
For further
information contact Chris Castle on 021 55 81 85 or email chris@crpl.co.nz