what is drainage system?

Answer Posted / narendra

In industrial and residential areas, a drainage system is a
facility to dispose of liquid waste.
(For imp. Knowledge)
Sustainable Drainage Systems (SuDS), sometimes known as
Sustainable Urban Drainage Systems (SUDS)[1], are designed
to reduce the potential impact of new and existing
developments with respect to surface water drainage
discharges.
The idea behind SUDS is to try replicate natural systems
that use cost effective solutions with low environmental
impact to drain away dirty and surface water run-off
through collection, storage, and cleaning before allowing
it to be released slowly back into the environment, such as
into water courses. This is to counter the effects of
conventional drainage systems that often allow for
flooding, pollution of the environment - with the resultant
harm to wildlife - and contamination of groundwater sources
used to provide drinking water. The paradigm of SUDS
solutions should be that of a system that is easy to
manage, requiring little or no energy input (except from
environmental sources such as sunlight, etc.), resilient to
use, and being environmentally as well as aesthetically
attractive. Examples of this type of system are reed beds
and other wetland habitats that collect, store, and filter
dirty water along with providing a habitat for wildlife.

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