WHAT IS HARVESTING?
Harvesting is defined as storing in such a way that it
can be used throughout the year.
WHAT IS RAIN WATER HARVESTING?
Rainwater harvesting is the accumulating and
storing of rainwater by artificial methods for
The principle of collecting and using precipitation
from a catchments surface.
Mostly done by rooftop harvesting and is used for
domestic and agricultural purposes.
WHY IS THIS REQUIRED?
Surface water is inadequate to meet our demand and we have to
depend on ground water.
To arrest ground water decline and augment ground water table
To beneficiate water quality in aquifers
To conserve surface water runoff during monsoon
To reduce soil erosion
Due to rapid urbanization, infiltration of rain water into the sub-
soil has decreased drastically and recharging of ground water has
Bangalore gets most of its drinking water from a distance of 95
kms. and a depth of 500 mts.
RAIN WATER HARVESTING
Roof top rainwater harvesting.
Surface runoff harvesting .
SURFACE RUNOFF HARVESTING
Harvesting of surface runoff and
storage of the same into
reservoirs such as water pans
makes it available for use when
In this method of collecting
rainwater for irrigation, water
flowing along the ground during
the rains will be collected to a
tank below the surface of the
USES OF RAINWATER HARVESTING
Industrial and Commercial use
Increase groundwater supplies
It provides self-sufficiency to water supply.
Rainwater harvesting is less expensive, easy to
construct and easy to maintain.
Rainwater Harvesting slows down water flow, contains
potential floodwater and reduces spread of pollution.
The water is convenient and accessible; valuable time
and effort are saved in collecting and/or hauling water.
It provides a supply of water to meet our future needs.
Initial cost may be high.
Regular Maintenance .
Vulnerable water quality.
Storage capacity limits.
On of the best way to solve the world burning facing issue:
Most useful for large scale applications.
Saving of energy per lifting of well and saving of Water
Harvested water can be used for Daily household needs.
The more the business and industries involved = greater
environmental and economic benefits.
Rainwater Harvesting saves water, money and the
A NOBLE GOAL
A COMMON RESPONSIBILITY