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Title
WaterAid - Rainwater Harvesting Technical Brief
Abstract
Where there is no surface water, or where
groundwater is deep or inaccessible due to hard
ground conditions, or where it is too salty, acidic or
otherwise unpleasant or unfit to drink, another source
must be sought. In areas which have regular rainfall the
most appropriate alternative is the collection of rainwater,
called ‘rainwater harvesting’.
The term ‘rainwater harvesting’ is usually taken to mean ‘the immediate
collection of rainwater running off surfaces upon which it has fallen
directly’. This definition excludes run-off from land watersheds into
streams, rivers, lakes, etc. WaterAid is concerned primarily with the
provision of clean drinking water; therefore the rainwater harvesting
projects which it supports are mainly those where rainwater is collected
from roofs, and only to a lesser extent where it is collected from small
ground, or rock, catchments.
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