Principles of environmental science

1. Water Cycle
(hydrological cycle)
Group 4

2. Water gets recycled over
and over again
Image courtesy of US Environmental Protection Agency

3. The Water Cycle
The water cycle, also known as the hydrological cycle,
is a continuous and natural process that describes the
movement of water on, above, and below the Earth's surface. It
involves the conversion of water from one state to another
(solid, liquid, or gas) as it circulates through the atmosphere,
oceans, rivers, lakes, groundwater, and the land. The water
cycle is crucial for maintaining Earth's climate, providing
freshwater for various ecosystems, and sustaining life on our
planet.
The water cycle consists of several key processes, including:

4. This is the water cycle!
precipitation
evaporation
accumulation
transpiration
condensation

6. Water cycle is made up of
processes
 Transpiration
 Evaporation
 Condensation
 Precipitation
 Accumulation
 Infiltration and Percolation
 Surface Runoff

7. “Transpiration”
the evaporation of water from plants

8. “Transpiration”
Do plants really sweat?
Plants like me release water
to supply photosynthesis,
bring minerals up from the
roots, and cool ourselves off.

9. “Evaporation”
The conversion of water from a liquid to a gas
Solar energy drives evaporation of water from the ocean.
The evaporated water changes from a liquid form into
water vapor a gaseous form.

10. “Condensation”
The transformation of water vapor back into liquid water by cooling
Evaporated water is warmed and rises into the air where
it eventually cools and condenses to form clouds.

11. “Precipitation”
Rain, hail, or snow falling from the clouds
due to the condensation of water
With enough condensed water, you get rain!
When clouds become very heavy with
condensed water, the water is released
in the form of rain, hail, or snow.

12. “Accumulation”
The collection of precipitation into rivers, lakes, and oceans.

13. Infiltration and Percolation:
• When precipitation reaches the Earth's surface, it may infiltrate
the soil and percolate downward through rocks and underground
layers, becoming groundwater. Some of this groundwater can be
stored in aquifers for long periods.

14. Surface Runoff
Not all precipitation infiltrates the soil. Some of it flows
across the Earth's surface, forming streams, rivers, and
eventually entering lakes or oceans. This surface runoff plays a
crucial role in shaping the landscape and providing freshwater to
various ecosystems.

15. Implications of Water Cycle
•The water cycle has a tremendous impact on the climate. For
instance, the greenhouse effect will cause a rise in temperature.
Without the evaporative cooling effect of the water cycle, the
temperature on earth would rise drastically.
•The water cycle is also an integral part of other biogeochemical
cycles.
•Water cycle affects all life processes on earth.
•The water cycle is also known the clean the air. For instance,
during the process of precipitation, water vapors have to attach
themselves on to particles of dust. In polluted cities, the
raindrops, apart from picking up dust, also pick up water-soluble
gas and pollutants as they fall from the clouds. Raindrops are
also known to pick up biological agents such as bacteria and
industrial soot particles and smoke.

16. The End

17. Members
Princess Dianne Tayangona
Ella T. Tabor
Hazel Valderama
Dennise Urbano
Mc Ronel Ladica
Khristalyn Tatel
Kyla Mae Mayor