Water Drainage Techniques

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Submitted By dankegesa
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Water drainage techniques, materials, processes and maintenance (Name of Student)

(Name of Institution)

Water drainage techniques, materials, processes and maintenance
Under ordinary conditions rain water seeps into the ground and forms underground water.
Most of the water that falls as rain soaks into the ground or gets carried away by rivers. But in urban areas, the built environment alters the natural drainage of water, with hard surfaces increasing both the rate and amount of rainwater that turns into run-off. And it has to go somewhere. Traditional piped ‘drains’ have a limited capacity to cope with the high levels of surface water generated by extreme rainfall events. And, when the capacity of one or more parts of the drainage system is exceeded, the worst happens.
For example, in the floods of June 2007, extreme rainfall in the Midlands and the north of England led to large-scale urban flooding, with over 55,000 properties affected: two thirds of these were from surface water run-off overloading drainage systems.
In addition to flood risk, large amounts of surface water run-off can cause water quality problems. As water runs over hard urban surfaces, it picks up pollutants that are washed into water courses. For example, run-off from roads contains heavy metals and hydrocarbons which can seriously impact on water quality.
A well planned drainage infrastructure helps to manage water run-off by preventing domestic properties and other spaces such as paved public areas, car-parks, driveways and roads acting as conduits for run-off water. And it is more sustainable to manage storm water in a way that allows it to permeate naturally through the ground where it falls rather than being directed into already overloaded drains and public sewers.

Conventional drainage techniques

The…...

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