6. Are sources of water that are
useful to humans. Uses of water
include agricultural, industrial,
household, recreational and
environmental activities. Virtually
all of these human uses require
fresh water.
7. • Fresh water is renewable
resources like soil and air. The
world is supplied by clean and
fresh water and it is decreasing.
Water is one of our most critical
resources, but around the world
it is under threat.
10. Surface water is water in a river, lake
or fresh water wetland. Surface
water is naturally replenished by
precipitation and naturally lost
through discharge to the oceans,
evaporation, and sub-surface seepage.
11. As streams and rivers move
across the land they form
a flowing network called
RIVER SYSTEM
12.
13. Sub-surface water, or
groundwater, is fresh water
located in the pore space
of soil and rocks. I t is also
water that is flowing within
aquifers below the water
table.
14.
15. A level where the rocks
and soil are saturated
with water underground.
16. An aquifer is an
underground formation
that contains water.
17.
18. • Pororsity .- is the amount of
space between the particles that
make up a rock.
• Permeability.- Is the ability of
rock or soil to allow water to
flow through it.
19. *There are about 50
millions cubic Km of
groundwater on Earth.
*There’s about 20 times
more water underground
than in all of the rivers
and lakes on Earth.
20.
21. How do people use Water
Resources?
Household Personal Use Recreational activities
•Washing dishes
•Fill the car with
water
•Watering the plants
•Putting out the fire
•Give water for the
cows
•Watering the grass
•Washing the car
•Washing the teeth
•Drinking water
•Take a shower
•Going to the
bathroom
•Walk in the pool for
recovering health
•Go to the pool.
•Go to the beach.
•Walk in the pool for
recovering health.
•Skiing in the mountains.
•Fish in the lakes.
•Play with a ball in the
river.
•Surfeit in the ocean.
Picture:
Picture: Picture:
Divide
22. Agricultural: I t is
estimated that 69%
of worldwide water
use is for irrigation,
with 15-35%of
irrigation
withdrawals being
unsustainable.
Aquaculture is a
small but growing
agricultural use of
water.
This is the process
of irrigation
23. • Drip Irrigation: In drip irrigation water is
sent through plastic pipes with holes in
them. Then water slowly drips onto the
crop’s roots and stems. Advantages are
it is more efficient, loses less water to
evaporation, and can irrigate sloping,
irregularly-shaped land areas that can't
be flood irrigated. It is also a positive
way to water fields because it increases
the amount of grain and veggies you get
from the crops, and less people have to
work on the fields. This is the most
efficient irrigation method of the three.
24.
25. Industrial: I t is
estimated that 15%
of worldwide water
use is industrial.
The distribution of
industrial water
usage that is varies
widely, but as a
whole is lower than
agricultural use.
26. Household: I t is
estimated that 15%
of worldwide water
use is for household
purposes. These
include drinking
water, bathing,
cooking, sanitation,
and gardening.
28. Recreational
water: use is
usually a very
small but growing
percentage of
total water use.
Recreational
water use is
mostly tied to
reservoirs.
29.
30.
31.
32.
33.
34. Water pollution occurs when a
body of water is adversely
affected due to the addition
of large amounts of materials
to the water. When it is unfit
for its intended use, water is
considered polluted.
35.
36.
37.
38. Point pollution is pollution
that is discharged from a
single source, such as a
factory or waste water
treatment plant. (you can
point to it)
39.
40. Nonpoint pollution is pollution
that comes from many sources
rather than a single specific site.
41.
42. *Septic tank systems
*Storage lagoons for polluted
waste
*Municipal landfills
*Underground storage tanks
containing pollutants such as
*
gasoline.
Public and industrial wastewater
treatment plants.
43. *Highway construction and
maintenance:
eroding soil and toxic chemicals.
*Storm-water runoff from city and
*suburban streets: oil gasoline, dog
feces, litter.
*Pesticides from croplands.
**Fertilizers from croplands.
* Salt on roads for snow and ice control.
49. Chemicals that are
poisonous to living
things, including
heavy metals (lead,
mercury, cadmium),
and many industrial,
and some household,
chemicals.
