Presenter names: Ruksana Taj, Rajashri N.S.

Rain Water Harvesting

Presented By: Rajashri N.S.

What Is Rainwater harvesting?

The process of collecting and storing rain water in a scientific and controlled manner for future use is called rain water harvesting.

REASONS OF SHORTAGE OF WATER Population increase.

Industrialization.

Urbanization.

Decrease in surface area of Lakes, tanks etc.

Deforestation.

(i) Less precipitation.(ii) Absence of Barriers.

BENEFITS OF RWH Rain water is a ultimate source of fresh water.

Rain water harvesting helps to over come water scarcity.

Rainwater harvesting prevents flooding of low lying areas.

Rainwater harvesting systems are simple to install, operate, and maintain.

Why Rain water be harvested?

Surface water is inadequate to meet our demand and we have to depend on ground water.

Due to rapid urbanization, infiltration of rain water into the sub-soil has decreased drastically and recharging of ground water has diminished.

Methods of Rain water harvesting Collection of roof top rain water .

Construction of seepage pits.

Construction of check dams.

Recharging tube wells.

Construction of ponds and dams.

Construction of ponds and dams.

Erection of bunds.

Collection of roof top rain water

Construction of seepage pits

Construction of check dams

Recharging tube wells

Construction of ponds and tanks

Erection of bunds

Advantages and disadvantages of RWH.

Advantages

Simple Construction

Ease of Maintenance

Systems are Flexible and Adaptable

Disadvantages

Vulnerable Water Quality

Water Supply is Climate Dependent

Storage Capacity is Limited

Conclusion IN DENSELY POPULATED COUNTRIES LIKE INDIA, THE

DEMAND FOR WATER GOES ON INCREASING WITH INCREASE IN POPULATION. HENCE IT IS NECESSARY TO ADOPT RAIN WATER HARVESTING.

Thank you