DESERTIFACTION AND DROUGHT IS A MAJOR PRIBLEM ???

3. Desertification is a
process of turning
the productive
land into desert.

4. DESErTIFICATION

5. .

6. desertification
climate humans animals

7.  Drought: low rainfall since 1968.
 Soils become dry and there is no
water left in wells.
 Trees die, grass withers and is
replaced by poor desert scrub.
 Crops fail and cattle feed on poor
pasture.
 Less roots to protect the topsoil, less
humus; soils become more sandy and
dry.
 Wind erosion removes the soil,
causing dust storms, leaving bare rock.

8. Human activity
 To increase food supplies
morecrops are grown and more
cattle kept leading to over-
cultivation and over-grazing.
 Population is high and increasing
fast.
 Yields decline and cattle are
undernourished and die.
 Demand increases for water as
population grows.
 Trees are cut down for fuel
supplies.
 Less vegetation; more dry, bare
soil; more wind erosion.

9. Locusts destroy the
crops.
Overgrazing means all
vegetation is eaten.
Animals trample the
ground reducing it to dust.
Animals die and can’t
breed

10. Dryland regions of the world (yellow)

12. Food and water
shortages lead to
malnutrition,
famine, disease
and high death
rates.

13.  Large numbers of
people become dependent
on food aid programmes.
Aid Programmes

14. From rural to urban areas
causing over-population in
towns.
To refugee camps.

15.  .Control the population.
growth / natural increase
by using family planning, in
order to decrease the land
use capacity
 .The number of grazing
and the rate of cultivation
should not over the
carrying capacity of land

16.  improve i)farming &
ii)grazing methods, in other
to reduce soil erosion and
salinization
 Legislation: band the
deforestation and over
grazing, etc. , in order to
balance the ecosystem of
desert.

17.  . afforestation i.e. plant the
wind break trees & drought
resistant plants
 .stone lines (e.g, in Burkina
Faso)
 .Building reservoir and canal ,
(e.g, The Indira Gandhi Canal)