This document discusses cloud bursting, which is an extreme amount of precipitation over a short period of time capable of causing flash flooding. It defines cloud bursting as rainfall of over 100 mm per hour and explains that the rapid growth of large raindrops falling from convective clouds up to 15 km high can cause these events. The document also notes that hilly areas are more prone to cloud bursting when water flows down steep slopes quickly. While cloud bursts are difficult to predict precisely, areas likely to experience heavy rain can be identified. The impacts of cloud bursting include floods, damage, deforestation, and loss of life. An example of a devastating cloud burst is described from Leh, Ladakh in 2010 that killed 300 people.
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WHAT IS CLOUD BURSTING
A cloudburst is an extreme amount of
precipitation, sometimes with hail and
thunder, which normally lasts no longer
than a few minutes but is capable of
creating flood conditions.
Meteorologists say the rain fall rate equal
to or greater than 100 mm (3.94 inches)
per hour is a cloudburst. The associated
convective cloud, can extend up to a
height of 15 km above the ground.
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HOW DOES CLOUD
BURST HAPPENS ?
Rapid precipitation from clouds is
possible due to precipitation process in
which large droplets can grow rapidly by
coagulating with smaller droplets which
fall down slowly.
* Precipitation is when
chemical reaction takes place
in the formation of a solid in a
solution or inside another
solid during a chemical
reaction or by diffusion in a
solid.
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Why are the hilly areas
more prone to cloud burst?
The topographical conditions like steep
hills favour the formation of these clouds.
And also the devastations, as water
flowing down the steep slopes bring
debris, boulders and uprooted trees with
great velocity damaging any structure
that comes in their way.
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Can Cloud Burst be
predicted ?
There is no satisfactory
technique for anticipating
the occurrence of cloud
bursts because of their
small scale. A very fine net
work of radars is required to
be able to detect the
likelihood of a cloud burst
and this would be
prohibitively expensive.
Only the areas likely to
receive heavy rainfall can be
identified on a short range
scale. Much of the damage
can be avoided by way of
identifying the areas and the
meteorological situations
that favour the occurrence
of cloud bursts.
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WHAT CAN A
CLOUD BURST DO ?
•CAUSE FLOOD
•CAUSE HUGE DISTRACTION
•CAUSE DEFORESTATION
•DESTROYS VEGETATION
• LOSS OF TO HUMAN LIFE
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Duration Rainfall Location Date
1 minute
1.5 inches
(38.10 mm)
Barot, India
26 November
1970
5.5 minutes
2.43 inches
(61.72 mm)
Port Bells,
Panama
29 November
1911
15 minutes
7.8 inches
(198.12 mm)
Plumb Point,
Jamaica
12 May 1916
20 minutes
8.1 inches
(205.74 mm)
Curtea-de-
Arges, Romania
7 July 1947
40 minutes
9.25 inches
(234.95 mm)
Guinea,
Virginia, USA
24 August 1906
1 hour
9.84 inches
(250 mm)
Leh, Ladakh,
India
August 5, 2010
13 hours
45.03 inches
(1,144 mm)
Foc-Foc, La
Réunion
January 8, 1966
1 hours
5.67 inches
(144 mm)
NDA, Pune,
India
September 29,
2010
1.5 hours
7.15 inches
(182 mm)
Pashan, Pune,
India
October 4, 2010
24 hours
91.69 inches
(2,329 mm)
Ganges Delta
,India
January 8, 1966
CLOUD BURST STATS
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On 5th August 2010 around 12 mid night the
whole Ladakh was rocked by a devastating
mudslide due to cloudburst. The most
affected areas are lower Leh and Choglamsar
areas.
Apart from these two places many other
villages were badly affected by the flood.
The army was put into action for the rescue
operation. Both the civilians and the army are
actively working to rescue all those stuck
under the debris.
Many tourists are also volunteering in the
rescue operation.
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THE GREAT LOSS
•300 PEOPLE WERE DEAD
•470 PEOPLE WERE INJURED
•1200 PEOPLE HOUSES WERE DAMAGED
•92 PEOPLE STILL MISSING
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THE GREAT LOSS
•Bharat Sanchar Nigam Ltd (BSNL)
•Indo-Tibetan Border Police (ITBP) camps
•204 Crore Rupees (close to $ 50 million)
•Loss of wealth from Foreign Tourist.
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DISASTER MANAGEMENT
TEAM TO RESCUE
• 41 columns of the Indian army are engaged in the
rescue and relief operations.
•Indo-Tibetan Border Police (ITBP)
•6,000 army men, and Central Reserve Police Force
(CRPF)
•THE INTERNATIONAL FELLOWSHIP OF BUDDHIST
YOUTH LADAKH (IFBYL)
•Ladakh Ecological Development Group
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GOVERNMENT SUPPORT
TO LADAKH
• Prime Minister Manmohan Singh on 17.08.2010
announced a Rs 125 crore relief packaged for the Leh
cloudburst victims and said all houses destroyed by
the natural calamity will be reconstructed by the
goveronment.
•A Fund of Rs 50,000 Fund to seriously injured
person.
•At the end of April 2012 the government was able to
generate funds of 350 crore with the help of NGO’s
worldwide.