The diagrams below show how houses can be protected in areas which are prone to flooding. Summarise it.
The diagrams compare two different methods of defence for homes which are at risk of being flooded.
The key difference between the diagrams is that they show
flood
portection
with and without a Correct your spelling
protection
stopbank
. In either case, the at-risk home is raised on columns above ground level
.
The first diagram shows how a stopbank
acts as a flood
barrier to stop river
water from flooding homes. The stopbank
is a small mound next
to the river
, and it is higher than the 100-year flood
level
. It prevents the river
from overflowing towards the area where nearby buildings are. Nearby houses can be built on columns to prevent flooding from rainwater, and a floodgate beneath the stopbank
can be opened to allow this
water to discharge into the river
.
When there is no stopbank
, as shown in the second
diagram, there will be nothing to stop the river
fromm
flooding. In Correct your spelling
from
this
case, the solution is to put the buildings on columsn
. The Correct your spelling
column
columns
hieght
of Correct your spelling
height
columns
is above the 100-year Correct article usage
the columns
flood
level
, so the floor of house
Correct article usage
the house
300
mm above the 100-year Add a missing verb
is 300
flood
level
. This
measurement is called as
freeboard.Correct your spelling
a
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Vocabulary: Replace the words flood, stopbank, level, river with synonyms.
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Vocabulary: Rephrase the word "undefined" in your introduction.
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Vocabulary: Only 4 basic words for charts were used.
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Vocabulary: The word "diagrams" was used 4 times.
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Vocabulary: The word "show" was used 2 times.
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