Hydrologic Cycle is also called as Water Cycle. It basically deals with transformation of water in different forms starting from gaseous stage (water vapor) to liquid state (water on earth's surface), and water inside soil as underground water.and again back to gaseous stage. The cycle has no starting or end.

1. By – N.G.Palit
Hydrologic Cycle

2. Hydrologic Cycle

3. This is about the movement of
water on Earth
 Hydrologic Cycle is also
called Water Cycle.
It deals with the origin and
distribution of water on
the globe.
 Complex pathways
include passage of water from gaseous stage
in the atmosphere to oceans, lakes, rivers etc.

4. Hydorlogical Process
 Hydrological cycle includes the
following processes:
evaporation, condensation,
precipitation, interception,
infiltration, percolation,
transportation, runoff and storage.

5. Evaporation
 Evaporation occurs when
water changes from liquid
state to gaseous state.
 Evaporation occurs on
water surfaces like lakes,
seas etc. Evaporated moisture is lifted
into atmosphere. But, some vapor always
exists in the atmosphere.

6. Condensation
 Condensation is the
process by which water
vapor changes into water.
 Water vapor condenses
to form dew, fog or clouds.
 Condensation takes place due to cooling
of air.

7. Precipitation
 Precipitation is the process
that occurs when water
particles fall from the
atmosphere and reach the
ground.
 Precipitated water may fall into water
bodies or on land. It can then go to streams
or penetrate into the soil.

8. Interception
 Interception is the process
of interrupting the movement
of water in the chain of
transportation events
leading to streams.
 When rain first begins, water striking the
leaves and other materials spreads over
the surface or collects at points of edges.

9. Infiltration
 Infiltration is the physical
process involving movement
of water through the
boundary area where
atmosphere interfaces with the soil.
 Infiltrated water and water stored in the
soil, can become subsurface runoff.

10. Percolation
 Percolation is the
movement of water through
the soil, due to Gravity and
by capillary forces.
 All ground water originates
as subsurface water.

11. Transpiration
 Transpiration is the
biological process that
occurs mostly in the day.
 Water inside plants is
transferred to the
atmosphere as water vapor. Only a small
portion of water is retained by the plants.

12. Runoff
 Runoff is a flow from a
drainage basin in surface
streams.
 It generally consists of
the flow that is unaffected
by artificial diversions or storages.

13. Storage
 There are three basic water
storage places:
in atmosphere, on earth’s
surface, and in the ground.
 Surface storage places are:
ocean, lake, reservoirs, glaciers.
 Underground storage occurs in soil, in the
cracks of rocks etc.

14. Floods & Droughts
 Uneven distribution
and movement of
water can cause
extreme phenomena
such as Floods
and
Droughts.

15. Questions?

16. Thank You
By –
N.G.Palit

17. At the End
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