$1,500 pays for installation of
a rainwater catchment sysem for a health
clinic or a school in Central America.
The
typical target project is located in a rural area of Belize, Guatemala,
Honduras,
El Salvador, Nicaragua, Costa Rica, or Panama.
The
project utilizes simple technology to capture rainwater that comes off
the roof of a community facility, and channel it into a vessel, to be
stored for
drinking and other uses. Water
runs off
of the typical tin roof, and instead of falling to the ground, is
diverted by a
system of rain gutters.
The gutters may
be covered to prevent the entry of leaves and other debris, and there
may be an
additional screen near the tank which is kept clean manually. The water from the gutters
is aggregated in a
downspout and collected in a tank or other type of vessel.
Rainwater catchment may be
considered as a subcategory of rainwater
harvesting, which also incorporates additional means for capturing and
storing
water.
During
a typical wet season, the rainwater catchment system may serve to
collect all of the water needed for the facility.
During the dry season, the facility often must
look for other means to obtain needed water.
This
project is a natural antecedent or follow-up to the typical School
Water Tank Project, mentioned elsewhere on this site.
Water collected by the rainwater catchment
system is stored in a sanitary tank for later use.
There
are many improvements that can be added to this project to make it
more useful. If
water is saved for a
considerable amount of time, it must be filtered and otherwise purified
if it
is to be safe for drinking. If
more than
one barrel is needed, a set of valves must be installed to switch the
water
flow to the empty barrel.
Care
must be taken to ensure that the water collected can be used with a
minimal amount of treatment. A
useful
addition is a simple device that uses a float valve in the collection
line to
send the first rain out onto the ground. Only
then, when the roof surface is cleaned of
pollutants and debris, is the water channeled into the drinking water
supply.
It
is important that rain gutters of the appopriate materials and quality
are
used, in order to maintain functionality for many years to come.
The
installation of the gutters and piping is easily done by the community
members.
Thus, donations go
direclty toward
materials, and not for labor or overhead.
Once
the efficacy of such a system is seen by the townspeople, the process
may
be replicated for other community buildings and for family homes.
Please use Twitpay, @twitpay, http://twitpay.me, powered by PayPal, by tweeting the following from your Twitter account:
@twitanthropy twitpay $10.00 for rainwater catchment