Hello Friends, I have made this PPT especially for 10th Standard students of Maharashtra State Board (SSC). This PPT is made highly informative and illustrative, so that each and everyone of you can understand the basics of Science. Best of Luck!

2. What is RainwaterHarvesting?
Rainwater harvesting is the accumulation and deposition of rainwater for reuse
before it reaches the aquifer. Uses include water for garden, water for livestock,
water for irrigation, and indoor heating for houses etc.. In many places the water
collected is just redirected to a deep pit with percolation. The harvested water can
be used as drinking water as well as for storage and other purpose like irrigation.
States in India practising RainwaterHarvesting:-
TAMIL NADU:-
In the state of Tamil Nadu, rainwater harvesting was made compulsory
for every building to avoid ground water depletion. It proved excellent
results within five years, and every other state took it as role model.
Since its implementation, Chennai saw a 50 percent rise in water level in
five years and the water quality significantly improved.
Rajasthan:-
In Rajasthan, rainwater harvesting has traditionally been practiced by
the people of the Thar Desert. There are many ancient water harvesting
systems in Rajasthan, which have now been revived Water harvesting
systems are widely used in other areas of Rajasthan as well, for example
the chauka system from the Jaipur district.
Kerala:-
There are good opportunities for Rainwater harvesting in
Kerala because Kerala is located in a geographical area with two rainy
seasons. Kerala faces severe water scarcity between February and mid

3. May every year. During summer, there are drinking water shortages.
During this period drinking water and other water purposes become
unavailable. This is expected in the coming years. In spite of 44 rivers
and world's largest water well density, per capita surface
water and groundwater availability of the State is lower than that
of arid States of India. Moreover, Kerala has one of the lowest per capita
rainwater availability in the Indian sub-continent and it is still decreasing
over the time, even though it receives 3000 mm of rainfall, which is
around 3 times the Indian national average. The high variations in spatial
and temporal rainfall add to the complexity of problems associated with
water management faced by the State.
Pune:-
At present, in Pune (in Maharashtra), rainwater harvesting is compulsory
for any new society to be registered.