Transcript SDC Bangkok Thailand SKH 23März2012

Swiss Humanitarian Aid
Thailand Floods 2011
Nov. 2th, 2011 – Nov. 11 th, 2011
SKH– Swiss Humanitarian Aid Schweizerisches Korps für Humanitäre Hilfe
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Gerard Luyet, Hydrologist (WES) Responsable de l'activité Eau Potable SIG Genève
Claudio Valsangiacomo, PhD, Microbiologist (WES) Schweiz. Fachhochschule Gesundheit Tessin
Urs Nigg, Civil Engineer (DRR, Flood Management), Abt. GeP / BAFU
Philipp Teysseire, PhD, Civil Engineer (DRR, Flood Management), Ing. Büro T&C, Visp
Thomas Fisler (HA Coordinator), Bangkok
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Chao Phraya River
160‘000 km2
MQ: 883 m³/s
Q=3‘500 - 4000 m³/s
Flooded area November
2011
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Facts
• Inundation triggered by monsun
• Affected population 23 Mio.
• Casualities 400 (Flooded area 60‘000 km2 ,
approx. 12 % of Thailand)
• Biggest flood in Thailand for 50 years
• Damages 11.8 Mrd. Euro
• Effects on world economy (Computer /
Harddisks- and Automobile Industries)
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ACTIVITIES Nov. 3 - 9:
• Assessment to Bhumibol Dam, flight over flooded area
• Ground inspection of flood affected areas in North East and
Western Bangkok and coastal pumping stations,
• Site visit on construction works of big bag dam
• Water quality testing in and around greater Bangkok and
treatment plant
• Inspection of general conditions and water quality at Evacuation
Centres
• On site inspection Interaction with focal points and experts at
FROC (Flood Relief Operation Center)
• Meetings with staff of Ministry of Public Health
• Discussion/Evaluation on flood modelling computer simulation
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Irrigation system around
Bangkok
Don Muang Airport
Inner Bangkok
Suwarnabhumi Airport
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Big bags along Defense line
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FINDINGS ON FLOODWATER MANAGEMENT:
• The resilience and humanitarian disaster response in dealing
with the flood by everyone is outstanding
• The current event is considered as a natural disaster with a rare
probability
• The scale and magnitude of the floods exceeds a controlled
water management: damage control, humanitarian response
and asset preservation is the only option
• The concept of diverting the floodwater to the Eastern and
Western side of inner Bangkok is correct
• The influence of the built up area on the flood is only locally
relevant (Anthropogenic effects)
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FINDINGS ON FLOODWATER MANAGEMENT:
• Drainage and retention infrastructures are not designed for
such large scale floods
• At present no accurate predictions of floodwater inundations
can be done
• Inflow of water towards inner Bangkok areas are still high
• King’s dyke and immediate dam reinforcement measures taken
are crucial to manage actual and further floods
• The impact of the flood will be long term and risk reduction
measures must be addressed long term
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CONCLUSIONS:
• The flood level in downtown inner Bangkok is assumed to be at
very low intensity (if at all less than 30 cm)
• Existing and additional spot measures (sandbags, mobile
pumps) reduce the impact of further damages significantly
• The outer areas will be flooded for several days and weeks
• Emphasise on maximum pumping capacity to reduce further
flooding and drain off the existing inundations
• No additional technical options are identified to optimise the
chosen strategy
• The existing infrastructures need to be adjusted to minimise the
risk on future floods (long term floodwater management)
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RECOMENDATIONS:
Short term:
• Continue to verify and monitor the protective measures of the
Suvarnabhumi airport as a priority
• Unaffected industrial areas require specialist expertise to advise
on immediate localised protection measures to avoid flooding
(inflatable flood barriers, sandbags, pumps)
• High priority towards all required measures to maintain
unhindered access of the Highway to the South
• Communicate preventive steps and alert areas within the
possible path of the flood as early as possible
• Maintain and monitor the inner city Klongs, install additional
pumping capacity if not already enforced
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RECOMENDATIONS:
Medium term:
• Further develop emergency preparedness plans :
• Weather forecast and early warning/information to all
relevant Departments
• Organise network on floodwater management, intervention,
rescue and assistance services during extraordinary
situations
• Incident documentation of the current floods in order to draw
lessons learnt
• Expand currently developed floodwater modelling and
simulation to identify required measures
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RECOMENDATIONS:
Medium term:
• In depth study required to identify various options for adaptive
design on sustainable flood protection, if not already enforced
• Create a solid financial base to ensure the needed sustainable
measures
Longer term:
• Further develop of an integrated risk management of all natural
dangers in Thailand
• Establish a sound risk management dialogue of all stakeholders
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Meeting with Prime Minister Yingluck Shinawatra, Nov. 10, 2011
Activities
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Thank you !