fsa annual conference: june 15-17, 2016 · 2017-01-13 · fsa annual conference: june 15-17, 2016...
TRANSCRIPT
FSA Annual Conference: June 15-17, 2016
Gene Altman, PE
Alvan Karlin, PhD, CMS, GISP
Mark Fulkerson, PhD, PE
OUTLINE
• SWFWMD’s Watershed Management Program
• High Water Database
• Flood Imagery
• Model Verification
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WATERSHED MANAGEMENT
PROGRAM
• 97 completed
• 37 ongoing
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• Flooding Happens
Lake Geneva, Ridge Manor, FL
HIGH WATER DATABASE
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• Flooding Happens
• Historical Evidence
• Public Awareness
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• Flooding Happens
• Historical Evidence
• Public Awareness
• Limited Data
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Built Flooded Mitigated
2002 2004 2006
• Flooding Happens
• Historical Evidence
• Public Awareness
• Limited Data
• Decision Making
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• Flooding Happens
• Historical Evidence
• Public Awareness
• Limited Data
• Decision Making
• Verification Tool
No Historical FEMA Floodplain Modeled 100-yr Floodplain (SWFWMD, 2010) 10
• Existing Data Sources
HIGH WATER DATA
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• Existing Data Sources
• Field Measurements
HIGH WATER DATA
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FLOOD COMPLAINTS (4,000)
KNOWN FLOODING AREAS (4,300)
FLOOD PHOTOS (3,300)
HISTORICAL WATER LEVELS (6,600)
HIGH WATER DATABASE
http://ftp.swfwmd.state.fl.us/pub/gisdata/HighWater_Database/ 13
Historical 100-yr Floodplain (FEMA, 1982)
1970s Imagery
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Historical 100-yr Floodplain (FEMA, 1982)
2011 Imagery
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Current 100-yr Floodplain from WMP (SWFWMD, 2011)
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srh.noaa.gov 17
nws.noaa.gov
TROPICAL STORM DEBBY
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• 800 Flood Photos
• 215 Flood Compaints
• 620 High Water Elevations
IMAGE ACQUISITION
MicroSoft/Vexcel UltraCamX
Cessna 208 - Grand Caravan
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Satellite Pour L’Observation de la Terra (SPOT 5)
Launched: 4 May 2002 Stopped Functioning: 31 March 2015
Image Captured: 28 June 2012 Image Received by SWFWMD: 29 June 2012
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• SPOT satellite (20 meters)
• High-resolution aerial (0.6 meters)
Flood Imagery
Flooded roads and businesses
Flooded homes
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Peck Sink Watershed
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Terrain
Peck Sink
Elevation (250 to 20 feet)
High Runoff/ Low Infiltration
Internally Drained
WATERSHED CHARACTERISTICS
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TS Debby
Rainfall Amount 12 to 16 inches
Flooded Area 3.6 mi2
100-Year Storm
13 inches
4.0 mi2
Model Verification
High Water Data
TS Debby Floodplain TS Debby Floodplain 24
• SPOT satellite (20 meters)
• High-resolution aerial (0.6 meters)
Model Verification
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SPOT Satellite High-Resolution Aerial
FLOOD IMAGERY VS MODEL VERIFICATION FLOODPLAIN
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OBLIQUE PHOTO WITH HIGH WATER MARKS
(Photo courtesy of Hernando County Emergency Management) 27
In Conclusion…
• Value and Benefits
• Effort Involved
• Cost Savings
Cost to develop detailed floodplains for this watershed $377,418
Cost to acquire flood imagery for 300 square miles $25,000
Cost to collect high water elevations at 200 locations $10,000
FEMA’s Hazard Mitigation Grant Program Acquisition Costs
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Contact Information
1. Gene Altman, PE, [email protected]
2. Alvan Karlin, PhD, CMS, GISP, [email protected]
3. Mark Fulkerson, PhD, PE, [email protected]
Publication
Karlin, A.; Fulkerson, M; Altman, G. Using SPOT and Aerial False-Color Infrared (fCIR) Imagery to Verify Floodplain Model Results in West Central Florida. Geosciences. 2016, 6, 24. 29
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QUESTIONS, COMMENTS,
OPEN DISCUSSION