Friday, May 24, 2013
Rainwater harvesting
Posted by
Green Yatra
at
9:16 PM
Rainwater
harvesting is the accumulating and storing, of rainwater. It has been used to
provide drinking water, water for livestock, water for irrigation or to refill
aquifers in a process called groundwater recharge. Rainwater collected from the
roofs of houses, tents and local institutions, can make an important
contribution to the availability of drinking water. Water collected from the
ground, sometimes from areas which are especially prepared for this purpose, is
called Stormwater harvesting. In some cases, rainwater may be the only
available, or economical, water source. Rainwater harvesting systems can be simple
to construct from inexpensive local materials, and are potentially successful
in most habitable locations. Roof rainwater can be of good quality and may not
require treatment before consumption. Although some rooftop materials may
produce rainwater that is harmful to human health, it can be useful in flushing
toilets, washing clothes, watering the garden and washing cars; these uses
alone halve the amount of water used by a typical home.
There are a
number of types of systems to harvest rainwater ranging from very simple to the
complex industrial systems. The rate at which water can be collected from
either system is dependent on the plan area of the system, its efficiency, and
the intensity of rainfall (i.e. annual precipitation (mm per annum) x square meter
of catchment area = litres per annum yield) ... a 200 square meter roof
catchment catching 1,000mm PA yields 200 kLPA.
Make Rain
water harvesting a must for all houses and offices in urban cities. Urban
cities in India are facing dual problems. Firstly they face acute shortage of
water during first half of year and then there is flooding of streets during
rainy seasons due to improper and inadequate drainage system. Some cities in
India like New Delhi, Bangalore have incorporated rain harvesting policies in
their state policies. However what remains a fact is that rain water harvesting
is not widely acknowledged across most other major cities. The ill-organized
drainage systems do not trap surface water and most of the surface water flows
into drains and therefore there is not much recharging of the under-ground
water.
Rain water harvesting
comes with many benefits
1. Provides ideal solution in places where the
ground water level is low or there is inadequate surface resources to trap the
ground water.
2. Reduces urban flooding
3. Improves quality of ground water
4. Prevents water stagnation
5. Prevents wastage of water
6. Improves plant growth
Mentioned
below are few low-cost measures which would cost just a few thousand rupees
which is quite affordable for urban citizens-
1. Bore wells
2. Pits
3. Trenches
4. Dug wells
5. Water Tanks
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ReplyDeleteThanks for sharing such a informative article about rain water and water harvesting in India.
ReplyDeleteVery nice information about rain water harvesting. If looking for more information about rain water harvesting visit our website.
ReplyDeleteGreat blog related to rain water harvesting , i really liked it. Keep posting and provide more information related to rain harvesting.
ReplyDeleteNowadays Rain harvesting is very important think and it is very beneficial for us because if we used saved rain water then it reduces our water bills
ReplyDeleteWater provision is the essential foundation for all other forms of rural development. Examples from Rajasthan, India, illustrate how safe potable water availability not only improves health and releases time and energy of women, but also improves poor people’s income, education, as well as social and cultural well-being.
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