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3.1.3.1 UK physical landscapes
L7 - River management, hard and soft engineering
channel straightening
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this is
channel straightening
channel straightening
the rivers course is straightened -
meanders
are cut out by building artificial straight channels
benefit of channel straightening
water
is moved out of the area quickly, because it doesnt travel as far, which reduces
flood risk
benefit of channel straightening
it can improve
navigation
for
shipping
so it will encourage increased trade
benefit of channel straightening
homeowners will have confidence to invest in their
properties
as they no longer need expect to be flooded and
insurance costs
should go down
cost of channel straightening
flooding is more likely
downstream
of the straightened section as the water reaches it
faster
cost of channel straightening
there is m ore
erosion
of the bed and banks due to a faster
velocity
cost of channel straightening
it is expensive to do
initially
and requires
regular
dredging to ensure it works effectively, leading to an
on-going
expense
cost of channel straightening
the
natural rive system
is
changed
and
so
are
habitats
cost of channel straightening
straightened rivers usually have a
concrete lining
, so it is unattractive