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From rainfall to tap water (Online Task)

Task 1 — Academic
⏱ 00:00
20 min recommended
0 / 150 words

Task 1 — Academic

You should spend about 20 minutes on this task. Write at least 150 words.

The diagram below shows how rainwater is collected and treated to produce drinking water in the town of Kelvey.

Summarise the information by selecting and reporting the main features.

The rainwater collection and treatment system at Kelvey
The rainwater collection and treatment system at Kelvey1CollectionRain falling on the hillside above the town runs into open stone channels thatlead to a covered storage reservoir.2ScreeningAs the water leaves the reservoir it passes through a coarse metal screen thattraps leaves, twigs and other floating debris.3SettlingIn a wide settling tank the water is held still for several hours so that sandand heavier particles sink to the bottom.4FiltrationThe clearer water above the sediment is drawn off and pushed slowly downwardsthrough deep beds of gravel and fine sand.5DisinfectionA measured dose of chlorine is added and the water waits in a contact tanklong enough for the remaining bacteria to be killed.6TestingSamples are taken every few hours and checked in the site laboratory before abatch is approved for release.7Storage and supplyThe treated water is pumped into a covered tower, from which gravity carriesit through the mains to homes in the town.

Marked on Task Response, Coherence and Cohesion, Lexical Resource, and Grammatical Range and Accuracy. Plan for a minute, write to length, then leave time to read it back.

0 / 150 words
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