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Disaster Management Using Space Technology in Bangladesh
Presented by: Md. Shahidul Islam / Probir Kumar Das Ministry of Disaster Management and Relief Bangladesh
United Nations International Conference on Space-based Technologies for Disaster Management “Risk Assessment in the
Context of Climate Change” 7-9 November 2012, Beijing, China
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1. Deltaic landscape, 80%flood plain with 20% hilly areas 2. Densely (1100/SqKm aprox) populated country (150
million) 3. High level of Poverty (32% Approx) 4. Natural resources based (predominantly agrarian)
economy 5. Disaster prone, people are exposed to hazards 6. Victim to global Climate Change, most vulnerable
country
ABOUT BANGLADESH
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NATIONAL DISASTER CONTEXT
• Frequently hit by various natural disasters like Cyclones, Storm surges, Floods, Tornadoes, Earthquakes, Droughts and other calamities • Monsoon flooding is an annual occurrence
• Climate change is likely to cause significant impact in the form of severe floods, cyclones, droughts, sea level rise and salinity affecting agriculture, livelihoods, natural systems, water supply, health etc. • The disaster vulnerable people demonstrates strong coping capacity to face the disaster challenges
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0
50,000
100,000
150,000
200,000
250,000
300,000
Cyclone Flood Cyclone Drought Cyclone Tornado Cyclone Flood Flood Flood Cyclone (Sidr)
Cyclone (Aila)
1970 1988 1988 1989 1991 1996 1997 1998 2004 2007 2007 2009
300,000
2,373 5,704 800
138,868
545 550 1050 747 1071 3406190
No.
of
peo
ple
1970 1988 1988 1989 1991 1996 1997 1998 2004 2007 2007 2009
Cyclone Flood Cyclone Drought Cyclone Tornado Cyclone Flood Flood Flood Cyclone (Sidr)
Cyclone (Aila)
Death 300,000 2,373 5,704 800 138,868 545 550 1050 747 1071 3406 190
DEATH DUE TO DISASTERS
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CLIMATE CHANGE SCENARIO
• Extreme temperature in summer (44deg/c) and winter (5deg/c) • Inconsistent Rainfall – more in wet season and less in dry season • Sea level rise
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• Increased number of severe monsoon flood / flash flood.
• Increased frequency and intensity of cyclone and salinity intrusion • Severe Drought
CLIMATE CHANGE IMPACT
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DROUGHT Affects 8.3 million ha land In 2006, reduced food grains by 1 million tons Loss of grazing fields, dried ponds, water shortage FLASH FLOOD Damages standing crops Damages infrastructures and facilities Unpredictable, uncertain FLOOD Inundates more areas, increases river erosion Breaches embankments, damages infrastructures Loss of crops, fisheries, livestock, biodiversity SALINITY INTRUSION Sea level rise, damage to Sundarbans watersheds Damages crop lands Spreading intrusion from 1.5 to 2.5 Mha (2007) Lack drinking water, burden to women & children Projected displacement: 6-8 m by 2050 CYCLONE Remain to be the deadliest and most destructive hazard Recurring event Lingering aftermath, complex recovery Improved preparedness (CPP, shelters, embankments)
HAZARD PROFILE
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VISION AND MISSION OF DM
GoB Vision To reduce the vulnerability of people, especially the poor and disadvantaged, to the effects of natural, environmental and human induced hazards to an acceptable humanitarian level and to have an efficient emergency response management system
To achieve a paradigm shift from conventional response and relief practice to a more comprehensive risk reduction culture and to promote food security as an important factor in ensuring the resilience of communities
MoDMR Mission
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REMOTE SENSING
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SEISMIC MICROZONATION AND
VULNERABILTY / DAMAGE ASSESSMENT
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Dhaka : 327000
Chittagong : 183000 Sylhet : 52, 000
0
20,000
40,000
60,000
80,000
100,000
120,000
140,000
160,000
RC LC BC BF TSL+BAL OthersDhaka 55,923 33,993 40,710 140,078 55,487 634Chittagong 63,905 3,190 8,047 70,173 36,962 0Sylhet 13660 2300 827 30896 4000 493
Build
ings
Major Structural Types of Buildings in Dhaka, Chittagong and Sylhet
Total Buildings: Dhaka: 326,825Chittagong: 182, 277Sylhet: 52,176
RS and GIS-based Building Inventory Database:
EARTHQUAKE VULNERABILTY AND DAMAGE ASSESSMENT
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Town All Buildings in Database
(No.)
Level I Survey Level II Survey
No. % No. %
Dhaka 326,825 8,741 2.67 875 0.27
Chittagong
182,277 6,175 3.39 494 0.27
Sylhet 52,176 3,536 6.78 507 0.97
Total 561,278 18,452 3.29 1,876 0.33
Note: Level I survey rate = 10 buildings/1 team/1 day Level II survey rate = 1-2 buildings/1 team/1 day
1 team = 2 man, 1 day = 8 working hour (8.00-17.00)
SAMPLE SIZE OF THE BUILDING SURVEY
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BUILDING AGE AND BUILDING DENSITY OF DHAKA
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BUILDING VULNERABILTY
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DEBRIS GENERATION SCENARIO
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LIFELINE VULNERABILTY
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LOCATION OF TEMPORARY SHELTERS POSSIBLE EVACUATION ROUTE
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TRAPPED POPULATION IN DHAKA CITY LOCATION OF SEARCH AND RESCUE CAMP
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FLOOD , STORM SURGE AND SALINITY INTRUSION MAPPING TO FACILITATE
COMMUNITY RISK ASSESSMENT (CRA)
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SLR 50cm was Selected for the Year 2050
50 cm
IPCC Synthesis Report 2009
SEA LEVEL RISE PROJECTION
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PAST 19 CYCLONES WITH 3 SYNTHETIC TRACK
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Sub-district: Mirsharai, District: Chittagong
Base Condition
Climate Change Condition
INUNDATION RISK MAPS
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Sub-district: Charfasson, District: Bhola
Base Condition
Climate Change Condition
INUNDATION RISK MAPS
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An area of 20,745 km2 will be inundated by more than 1m water depth in the changing climate
Base Condition Climate Change Condition
INUNDATION RISK MAPS
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•About 93% of the catchment area is outside the international boundary
•The rivers of Bangladesh drain run-off of upstream catchments of area about 1.73 Million square km
•Most of the rainfall occurs during monsoon. Hence monsoon flooding here in Bangladesh is a common phenomenon
GANGES, BRAHAPUTRA AND MEGHNA RIVER BASIN
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SAMPLE FLOOD INUNDATION MAP
Sub-district: Ullapara; District: Sirajganj
Flood Inundation for the Year 2050 Flood Inundation for 1988
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Base Condition Climate Change Condition
SALINITY DISTRIBUTION
District: Gopalganj
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SALINITY DISTRIBUTION
Sub-district: Shyamnagar; District: Satkhira
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Left Guide Bund
Sirajganj Hardpoint
Bhuapur Hardpoint Right Guide Bund
Left Guide Bund
Sirajganj Hardpoint
Bhuapur Hardpoint Right Guide Bund
Left Guide Bund
Sirajganj Hardpoint
Bhuapur Hardpoint Right Guide Bund
Left Guide Bund
Sirajganj Hardpoint
Bhuapur Hardpoint Right Guide Bund
Left Guide Bund
Sirajganj Hardpoint
Bhuapur Hardpoint Right Guide Bund
Left Guide Bund
Sirajganj Hardpoint
Bhuapur Hardpoint Right Guide Bund
Left Guide Bund
Sirajganj Hardpoint
Bhuapur Hardpoint Right Guide Bund
Left Guide Bund
Sirajganj Hardpoint
Bhuapur Hardpoint Right Guide Bund
Bangabandhu Bridge
SHIFTING OF THE RIVER COURSE [JAMUNA RIVER]
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SIDR Affected areas in the Sundarbans
Affected area is 21% Of total Sundarbans area
Forest Area Affected by cyclone SIDR
NDVI, Satellite Aqua, 20th November 2007
ASSESSMENT OF CYCONE DAMAGE
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50,500 hectare Boro rice was damaged by flash flood in April 2010.
MODIS Pre-flood Image MODIS Post-flood Image
ASSESSMENT OF CROP DAMAGE
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1972
1992
River morphology
EROSION AND BANKLINE SHIFTING
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A silent disaster in Bangladesh
Water-logging Monitoring System (WLMSRG) based on Remote Sensing and GIS Techniques.
Water-logged in 2009
BORO rice area in 2003
WATER LOGGING
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ASTER Image for Digital Elevation Modeling (DEM)
• High spatial resolution DEM derived using the stereo satellite data of Advanced Space Borne Thermal Emission and Reflection Radiometer (ASTER) sensor on TERRA satellite.
• The resolution of the Image is at 30m.
DEM
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GPS/ SATELLITE PHONE
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ONLINE CYCLONE SHELTER DATABASE [GPS APPLICATION]
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FISHING BOAT TRACKING SYSTEM [EW]
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CAPACITY BUILDING
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RAPID RESPONSE MAPPING
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• Training on Geographic Information System (GIS)
TRAINING
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• UN-SPIDER Technical Advisory Mission to Bangladesh • Use of Space Technology for Disaster Risk Reduction
MISSION/WORKSHOP
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• No own satellite. • Effective use of space information during emergency
response and post-damage need assessment (PDNA) • Early warning needs to be further strengthened by
providing better and timely access to the space based information and related technologies
• Analysis of images should be backed by reliable database (baseline)
• Local capacity exists and needs to be enhanced • Data duplication and redundancy
CHALLENGES
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Launching of satellite in near future
Capacity Development of both the organizations agencies responsible for earth observation and end users department
Building network and platform with related International/Regional data/technology provider
NSDI to avoid duplication and redundancy
Incorporation of space technology for DRR/CCA to national policy and plan
WAY FORWARD
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• Space Science and RS Technology is still under development stage, but a considerable progress there so far.
• The association with the international entity (like International Charter on Space and Major Disaster, UN-SPIDER/UNOOSA) and regional initiatives (like Sentinel Asia, ICIMOD, etc.) can help getting required datasets timely and providing capacity building support.
• Lastly, Space information should be easily available for developing countries like Bangladesh and distributed in such a format that everybody could use without much effort and technical knowledge.
CONCLUSIONS
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Thank you