7. *
* According to the Millennium Ecosystem Assessment, the number of flood events in
all the continents(except Australia) have steadily increased in the last 50 years. In
which Asia is most adversely affected by floods.
8. Distance Direction of
El Nino
From the Sea the Wind
Ocean Distance
Relief
Currents From Equator
9. *Causes
What people do What is the
the think? actual reason?
At the local level:
At the local level:
The actual reason of floods
Overflow of Yamuna river in our locality is the lack of
due to excess rain in Delhi. proper drainage system.
Otherwise, in the presence
of proper drainage system
the flood water would not be
able reach our locality. It
would seep away through the
drainage pipes.
10. *Causes
What is the actual
What people do the reason?
think?
At the regional level:
At the regional level: The actual reason is the excess
and extended rainfall in Delhi
Delhi: Overflow of Yamuna
and Yamuna Nagar district,
river due to the excess
Haryana (the district of
water release from the Dam
Hathikund barrage).
Hathnikund Barrage.
Due to the excess and
extended rainfall the
authorities are forced to
release water which gives a
rise to Yamuna causing flood in
the low lying areas of Delhi.
11. *Causes
What is the actual
What do the reason?
people think?
At the national level :
At the national level: • Disturbed monsoon pattern: Floods
• Excess rainfall activities have steadily increased
• Sudden release of water in the last few decades due to the
from reservoirs human interference in the
• Cyclonic disturbances (at monsoon patterns. Monsoon has
coasts) become more unpredictable due to
the interference in the
atmospheric pressure caused by
green house emissions.
• Ground cover: The movement of
slides beneath the earth’s crust is
a major cause for flooding. It
leads to tsunamis. It is a natural
cause for floods to occur.
12. *Causes
What is the actual
What do the
reason?
people think?
At the national level :
At the national level: • Landslides: It leads to
• Excess rainfall obstruction of flow and change in
• Sudden release of water the river course. This can be seen
from reservoirs in the mountain regions
• Cyclonic disturbances (at particularly near Himalayas
coasts) • Drainage Failure: There are
unauthorised colonies made by the
local people on open land without
considering city plans, drainage
etc. and thus are subject to
flooding during rainy seasons
15. *
* Flood causes huge number of injuries and deaths. Every year around billions of
people die all around the world. In 1996, the monsoon floods in India affected
more than 5 million people in northern and eastern parts of the country. Many
were left homeless and starved.
* Those people who work on daily basis are immensely affected by the floods.
* Due to shortage of supply of goods and huge demand the price level rises, this
causes problems for the common man to buy the goods.
* Flooding usually brings infectious diseases e.g. plague, dysentery, common cold,
fever etc. And for those areas where there is no electricity supply, food poisoning
may occur as food may not be properly frozen.