Name: 新澤西州為何會出現慢性洪水？ (Why chronic floods are coming to New Jersey)
Uploaded: 2021-01-14T07:48:12.000Z
Duration: 7 min 1 s
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情態助動詞 B1

When you look at the world's population
density map, you might notice a trend.

40% of the world's population lives within 100 kilometers of a coast.

are living in and around large
cities and these dense urban areas are

That growth calls for more
manufacturing, transportation, power plants,

Resources like this are often placed in cheaper,

low elevation land. Which means that for
many coastal communities, sea level rise

caused by climate change isn't just a
problem for the future.

One of these places is the New
Jersey Meadowlands.

stretch of small towns built on
marshlands.

levels rise, some communities will begin
to flood.

such as water on low-lying streets, water
coming in below seawalls.

Once that becomes noticeable and
problematic it's going to become chronic

So how do we know that
sea level is rising?

Scientists like these guys use a variety
of records to study sea-level change.

The longest record where people have been
observing sea-level rise directly is

These instruments measure the level of water

records and satellites, scientists have
recorded an acceleration in sea level

which they expect to continue through
this century.

probably looking at a range here in New
Jersey of about 1 to 2 feet of sea level rise.

It's going to impact low-lying
infrastructure in particular.

you're on a train and you had to wait for
high tide to go out before the train

and what a disruption
to the system that would be.

And then multiply that
by every other train line or roadway

It's one of the
busiest transit corridors in the United States.

If you draw a line from
Philadelphia to New York City and/or

Philadelphia to Boston, you basically
have to go through the Meadowlands.

So as a result, all of the infrastructure that
connects this region together

bottlenecks down, comes together in the
Meadowlands.

estimate that 115 rail stations here
would flood on a chronic basis.

nearly 60% of the region's
current power generating capacity would

If you think back to
Superstorm Sandy and one of the

iconic images of that storm was all of
lower Manhattan in darkness.

just an inconvenience in a home losing
power, we could shut down the entire

Hurricane Sandy was and is a historic storm.

Scientists recorded tides up to 20 feet
higher than usual along the New Jersey

record in the United States and the
tunnels that carry hundreds of thousands

of commuters every day still need repair.

will get worse during weather events
that aren't nearly as extreme as

The simple thing to
understand is that with a higher sea

level it requires less of a storm to
produce the same amount of flooding and

the same storm will produce more
flooding.

there have been documented
nuisance flooding events.

Those can happen even when it doesn't rain.
Oftentimes the water will come from the

Not so much rainfall flooding. On America's

eastern coast tides cycle four times a
day from high to low to high to low, but

at certain points of the year they can
rise much higher than usual.

point now with continued sea level rise,
that the high tides of the year often

times called king tides with maybe a
little extra wind behind them, they

become a problem and actually start to flood communities.

number of high tide flood days is
projected to increase fastest in

New York City. And in a few decades, coastal
cities on the Atlantic could experience

high tide flooding as often as three
times a week.

Hurricane Sandy brought, could become
more persistent very soon.

the century, many towns in New Jersey
would find themselves underwater

frequently. Including this town in the
heart of the Meadowlands.

suggested it would lose all of its
housing to chronic flooding.

to sea level rise
boils down to three options: prevention

Some critical infrastructure
can't relocate for economic reasons, so