The document discusses the MOSE flood barrier project in Venice, Italy and flood control techniques used in the Netherlands. It states that the gates of the MOSE project are placed at 45 degrees instead of vertically to allow them to reposition naturally with gravity. It also notes that global warming was taken into account in the project's design and that rising sea levels of up to 60 cm in 100 years were planned for. Additionally, it explains that over centuries the Dutch have become skilled hydraulic engineers through reclaiming large areas of land from the sea using techniques like surrounding marshes, planting reeds, installing canals and windmills to pump water.
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1. we don't place them vertically because
at 90 degrees it would be very difficult
to get them back in position on the
bottom
from 45 degrees gates can reposition
themselves naturally thanks to the force
of
it's gravity clever it takes 30 minutes
to fill the 78 valves with air
and another 30 minutes to bring the
gates to operational level
the movable barrier is designed to hold
back up to 3 metres of rising water
was global warming taken into account in
the mose project
yes the mohs system is one of the first
that the italian state has carried out
taking this problem into account
a hypothetical rise in sea levels of up
to 60 centimeters in 100 years has been
factored in
a high price has been paid by the
italians for this bold technology
an estimated 5.5 billion euros not
counting cases of corruption
this is the main grievance for the
project's many detractors
they complain that the system does
nothing to ease the main threat to the
city
with venice subsiding by several
millimeters every year
further north in europe in the
netherlands a whole nation has made the
control of water its speciality
over the centuries the dutch have become
formidable hydraulic engineers
reclaiming huge tracks of land from the
sea
[Music]
more than 20 of their country is built
on previously submerged land
reclaimed from the sea known as polders
[Music]
several centuries ago in order to create
polders the dutch first surrounded the
area they wanted to build on
isolating the marshes to be drained
then they planted reeds to absorb the
water
but this technique proved to be
insufficient
they went on to cover the area with
canals to drain away the water
the dutch then built windmills with a
screw to pump the water away
discharging it into a channel upstream
towards the rivers or the sea
the netherlands use more than 10 000
windmills to drain the land
in the 20th century reclamation has
intensified
![we don't place them vertically because
at 90 degrees it would be very difficult
to get them back in position on the
bottom
from 45 degrees gates can reposition
themselves naturally thanks to the force
of
it's gravity clever it takes 30 minutes
to fill the 78 valves with air
and another 30 minutes to bring the
gates to operational level
the movable barrier is designed to hold
back up to 3 metres of rising water
was global warming taken into account in
the mose project
yes the mohs system is one of the first
that the italian state has carried out
taking this problem into account
a hypothetical rise in sea levels of up
to 60 centimeters in 100 years has been
factored in
a high price has been paid by the
italians for this bold technology
an estimated 5.5 billion euros not
counting cases of corruption
this is the main grievance for the
project's many detractors
they complain that the system does
nothing to ease the main threat to the
city
with venice subsiding by several
millimeters every year
further north in europe in the
netherlands a whole nation has made the
control of water its speciality
over the centuries the dutch have become
formidable hydraulic engineers
reclaiming huge tracks of land from the
sea
[Music]
more than 20 of their country is built
on previously submerged land
reclaimed from the sea known as polders
[Music]
several centuries ago in order to create
polders the dutch first surrounded the
area they wanted to build on
isolating the marshes to be drained
then they planted reeds to absorb the
water
but this technique proved to be
insufficient
they went on to cover the area with
canals to drain away the water
the dutch then built windmills with a
screw to pump the water away
discharging it into a channel upstream
towards the rivers or the sea
the netherlands use more than 10 000
windmills to drain the land
in the 20th century reclamation has
intensified](https://image.slidesharecdn.com/12-210918164917/85/12-1-320.jpg)
