The diagrams below show how houses can be protected in areas that are prone to flooding. Summarise the information by selecting and reporting the main features, and make comparisons where relevant.
The diagram displays how apartment structures are constructed to prevent flooding in an easily affected environment. The most noticeable feature is the level of internal ponding beneath the building where there is no stop-bank had the highest flood level, while internal ponding beneath the building where there is a stop-bank had the lowest flood level.
Initially, where there is a stop-bank, the flood level is low; hence the internal ponding beneath the house is also low, while where there is no stop-bank, the internal ponding level rises. Secondly, the 100-year flood level had a high level where there was a stop-bank, while it was low where there was no stop-bank.
Thirdly, the freeboard of the building was 300mm raised above the flood to the house floor level where there is no stop-bank, while the freeboard was close to the roof level where there is a stop-bank. Fourthly, the building stands at the ground level higher, above the flood, where there is no stop-bank, while the building stands at the ground level, where there is a stop-bank, is lower, very close to the flood. Finally, the berm where there is no stop-bank had a higher berm level, while where there is a stop-bank had a lower berm.
In conclusion, the stop-bank was levelled up for the free flow of internal runoff to prevent a negative flood effect on the building; furthermore, in the case where there is no stop-bank, the building was raised 300mm the height of the building floor level above the water level.
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