New Zealand government scientists warned Tuesday the
country needs to plan around the threats of more severe floods as sea
levels rise with climate change.
The National Institute of Water and Atmospheric Research (NIWA) said
storm surge flooding was starting to occur more frequently on king
tides.
Sixty-five percent of New Zealanders including those in 12 of the
country's 15 largest towns and cites lived within 5 km of the sea and
the country had to plan to manage the growing risks, said NIWA principal
scientist Dr Rob Bell.
"Rises of more than a meter by 2100 can't be ruled out, and should at
least be considered in assessing the vulnerability of our existing
development at the coast," Bell said in a statement.
"New Zealand's Coastal Policy Statement directs that we also avoid
further increasing risk in the future. So for large new subdivisions and
developments, we should be building into this new development
sufficient capacity to absorb even higher rises in sea level, given the
permanent nature of subdivisions."
As sea-levels rose, low-lying coastal areas would face an escalating
risk from sea flooding, with a present-day 100-year flood event
occurring every year if the sea level rose by half a meter, said Bell.
Higher storm surges could damage beaches, seawalls, buildings, roads
and other infrastructure, and affect drinking-water supplies in lowland
rivers and groundwater.
Scientists are to present a synthesis of projections for sea- level
rise and its impact on the coastal environment at a New Zealand Climate
Change Centre (NZCCC) conference in Wellington on May 10 and 11.
"Planners and engineers here in New Zealand need sound guidance on
what sea-level rises are expected along our shores, working around the
key uncertainty about how quickly the polar ice sheets may melt in
future," said Bell.
The NZCCC is a joint initiative by New Zealand's government research
institutes, including NIWA, and Canterbury, Victoria and Massey
universities.
No comments:
Post a Comment