• Water resources are sources of water that are
useful or potentially useful to humans. Uses of
water include agricultural, industrial, household,
recreational and environmental activities. Virtually
all of these human uses require fresh water.
Water Water Every Where
But Not A Drop To Drink
• 97% of the water on the Earth is salt
water, and only 3% is fresh water of
which slightly over two thirds is frozen in
glaciers and polar ice caps. The
remaining unfrozen freshwater is mainly
found as groundwater, with only a small
fraction present above ground or in the
Surface Water Under River Flow
Increasing water scarcity
• It is caused by over exploitation,
excessive use and unequal access to
water among different social groups.
• Increasing population, intensive
industrialization, deforestation and
mismanagement of water resources have
caused a crisis
wastage of water
Multi Purpose River
Multi purpose river project is such a scheme which
serves several purposes at one and the same time
because of their uses they are rightly called the
temples of modern India by Pt. Nehru.
Such projects help in checking floods.
Ample of water is available for irrigation.
These projects help in electricity generation.
They are used for in land navigation and fish-
• What you can do to conserve water?
• Use only as much water as you require. Close
the taps well after use. While brushing or
other use, do not leave the tap running, open
it only when you require it. See that there are
no leaking taps.
• Use a washing machine that does not
consume too much water. Do not leave the
taps running while washing dishes and
• Install small shower heads to reduce the flow of the
water. Water in which the vegetables & fruits have
been washed - use to water the flowers & plants.
• At the end of the day if you have water left in your
water bottle do not throw it away, pour it over
• Re-use water as much as possible
• Change in attitude & habits for water
• Every drop counts!!!
Rain Water HarvestingRain Water Harvesting
• Rain Water Harvesting (RWH)- It is a
process of collecting, conveying & storing
water from rainfall in an area – for beneficial
• Storage is done in tanks, reservoirs,
underground storage- groundwater
• It is neither energy-intensive nor labour-
• RWH - yield sufficient amounts of water. For
an average rainfall of 1,000mm,
approximately four million litres of rainwater
can be collected in a year in an acre of land
Rain Water Harvesting
Rain Water Harvesting–Rain Water Harvesting–
1.Provides self-sufficiency to water supply.
2.Reduces the cost for pumping of ground
3.Provides high quality water, soft and low in
4.Improves the quality of ground water
through dilution when recharged.
5. Reduces soil erosion & flooding in urban
6.The rooftop rain water harvesting is less
expensive & easy to construct, operate and
7. In desert, RWH is the only relief.
8. In saline or coastal areas & Islands, rain water
provides good quality water.