Tuesday, April 24, 2012
Rainwater harvesting...by Green Yatra
Rainwater harvesting is
the accumulating and storing of rainwater. It is used to provide drinking water, water for livestock, water for irrigation and also 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 that 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 planned area of
the system, its efficiency, and the intensity of rainfall (i.e. annual
precipitation (mm per annum) x square meter of catchment area = liters per
annum yield). For example, a 200 square meter roof catchment catching 1,000mm
PA yields 200 kLPA.
Make Rain water harvesting a necessity
for all houses and offices in urban cities.
Urban cities in India are facing dual
problems. First, they face acute shortage of water during the first half of the
year, and then face the flooding of streets during rainy seasons due to
improper and inadequate drainage systems. Some cities in India like New Delhi
and 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 an 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 that would cost just a few thousand rupees and is quite affordable for
urban citizens
1. Bore wells
2. Pits
3. Trenches
4. Dug wells
5. Water Tanks
visit www.greenyatra.org for more notes and information
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In addition to your list of benefits of rainwater harvesting it is also an excellent source of good quality water. :D Another main benefit we can get from this water conservation system is the large volume of water every household in a society can save per day - approximately 200 liters. What really big savings we can get from this, right?
ReplyDeleteTabatha Tidd
Thanks for sharing this blog.it's really a great work done by you. we are also in same business providing the best solutions for rain water harvesting in India.
ReplyDeleteWater is essential factors in life. so to make available the water for the survival of human beings rain water harvesting is very important. Thanks for sharing such a nice blog with us.
ReplyDeleterain harvesting
We had the limited sources of water for survival of human beings. so it will be very needful to save the rain water and use it carefully.for rain water harvesting techniques visit rain harvest.
ReplyDeleteGreat post, Thanks for sharing such a nice post with the benefits of rain water harvest. I found your blog very informative and useful.so thanks green yatra for sharing your Knowles.
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