You should spend about 20 minutes on this task. The diagrams below show how houses can be protected in areas which are prone to flooding. Write a report for a university, lecturer describing the information shown below. Summarise the information by selecting and reporting the main features and make comparisons where relevant. You should write at least 150 words.

The diagrams illustrate how residential areas are protected from

flood

Add an article

the flood

a flood

show examples

.

Overall

, there are two ways to safeguard housing

building

Fix the agreement mistake

buildings

show examples

in

flood

areas, with or without a stopbank. Both solutions consider historical data

while

the former is an extension of the latter. In the first solution, buildings' floor levels are elevated from the ground to the freeboard level which is 300mm from the past

100 year

Add a hyphen

100-year

show examples

flood

level. As an extended solution, a stopbank

is build

Change the verb form

is built

is building

show examples

near the riverbank from the ground to the freeboard level. Its main objective is to act as a blocker for the

flood

that is

triggered by the increment in the riverbank, consisting of two main components a berm, and a floodgate. Despite blocking the water coming in from the river, internal rainfall could not flow out too. The

existences

Fix the agreement mistake

existence

show examples

of a berm and a floodgate solve

this

problem partially by releasing the internal outflow into the river ,

however

Add a comma

,however

show examples

there will still be minor internal ponding on the mainland.