19-06-2012, 02:54 PM
RAIN-WATER HARVESTING
RAIN-WATER HARVESTING.pptx (Size: 503.73 KB / Downloads: 44)
INTRODUCTION
Rain is the ultimate source of fresh water. With the ground area
around houses and buildings being cemented, particularly in
cities and towns, rainwater, which runs off from terraces and
roofs, was draining into low-lying areas and not percolating into
the soil. Thereby, precious rainwater is squandered, as it is
drained into the sea eventually.
Rain water harvesting is a system by which, the rainwater
that collects on the roofs and the area around the buildings is
directed into open wells through a filter tank or into a
percolation chamber , built specifically for this purpose.
Rainwater is collected directly or recharged into the ground to
improve ground water storage. Water that is not extracted from
ground during rainy days is the water saved.
NEED FOR RAIN-WATERHARVESTING
Major parts of our country have been facing continuous
failure of monsoon and consequent deficit of rainfall over the
last few years.
Also, due to ever increasing population of India, the use of
ground water has increased drastically leading to constant
depletion of ground water level causing the wells and tubewells to dry up.
In some places, excessive heat waves during summer create
a situation similar to drought.
It is imperative to take adequate measures to meet the
drinking water needs of the people in the country besides
irrigation and domestic needs.
Out of 8760 hours in a year, most of the rain in India falls in
just 100 hours.
RAIN-WATER HARVESTING.pptx (Size: 503.73 KB / Downloads: 44)
INTRODUCTION
Rain is the ultimate source of fresh water. With the ground area
around houses and buildings being cemented, particularly in
cities and towns, rainwater, which runs off from terraces and
roofs, was draining into low-lying areas and not percolating into
the soil. Thereby, precious rainwater is squandered, as it is
drained into the sea eventually.
Rain water harvesting is a system by which, the rainwater
that collects on the roofs and the area around the buildings is
directed into open wells through a filter tank or into a
percolation chamber , built specifically for this purpose.
Rainwater is collected directly or recharged into the ground to
improve ground water storage. Water that is not extracted from
ground during rainy days is the water saved.
NEED FOR RAIN-WATERHARVESTING
Major parts of our country have been facing continuous
failure of monsoon and consequent deficit of rainfall over the
last few years.
Also, due to ever increasing population of India, the use of
ground water has increased drastically leading to constant
depletion of ground water level causing the wells and tubewells to dry up.
In some places, excessive heat waves during summer create
a situation similar to drought.
It is imperative to take adequate measures to meet the
drinking water needs of the people in the country besides
irrigation and domestic needs.
Out of 8760 hours in a year, most of the rain in India falls in
just 100 hours.