economic valuation of flood mitigation servicesconference.ifas.ufl.edu/aces14/presentations/dec...
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Economic Valuation of Flood Mitigation Services
Keri Bryan, Taylor Ricketts, Gillian Galford, Steve Polasky, and Jarlath
O’Neil-Dunne
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Ecosystem Services andClimate Resilience
Climate Change
Human Wellbeing
Ecosystem Services
Vector-borne disease
Human Health
Biodiversity(dilution effect)
Hurricane Intensity
Inland Impacts
Coastal Buffers
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Increasing Flood Impacts
Flooding DamagesWetlands
and Floodplains
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Flooding DamagesWetlands
and Floodplains
Increasing Flood Impacts
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Glen Russel, LA Times Free Press
Flooding already has huge impacts globally
Flooding DamagesWetlands
and Floodplains
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Wetlands and floodplains mitigate floods
Flooding DamagesWetlands
and Floodplains
FAO-UNESCO, Soil Map of the World, digitized by ESRI. Soil climate map, USDA-NRCS, Soil Science Division, World Soil Resources, Washington D.C.
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The Case of the Otter Creek and Tropical
Storm Irene
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Research Questions
• What was the value of the Otter Creek wetlands in reducing flood damage during Hurricane Irene in 2011?
• Beyond this one event, what is the expected annual value of the wetlands in mitigating flood damages?
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Approach
• A hydrograph without wetlands
• Change in the extent of flooding
• Flooded structures
• Value in terms of avoided damages
• Mean annual value
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0
5000
10000
15000
20000
25000
30000
8/25/11 0:00 8/30/11 0:00 9/4/11 0:00 9/9/11 0:00 9/14/11 0:00 9/19/11 0:00 9/24/11 0:00
Dis
char
ge (
CFS
)
Rutland
MiddleburyRutlandMiddlebury
Hydrograph Extent Structures Damages Annual Value
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0
5000
10000
15000
20000
25000
30000
8/25/11 0:00 8/30/11 0:00 9/4/11 0:00 9/9/11 0:00 9/14/11 0:00 9/19/11 0:00 9/24/11 0:00
Dis
char
ge (
CFS
)
Rutland
Middlebury
Middlebury Witout Wetlands
RutlandMiddleburyMiddlebury without wetlands
Hydrograph Extent Structures Damages Annual Value
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54 Structures
9 Structures
Hydrograph Extent Structures Damages Annual Value
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With Wetlands Without Wetlands
Hydrograph Extent Structures Damages Annual Value
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With Wetlands Without Wetlands$ .14 million $ 2.4 million
$ 2.3 million
Hydrograph Extent Structures Damages Annual Value
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0
0.1
0.2
0.3
0.4
0.5
0.6
4000 6000 8000 10000 12000 14000 16000
An
nu
al P
rob
abili
ty
Discharge (cfs)
1936
1960
1977
1987
Irene
Hydrograph Extent Structures Damages Annual Value
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Hydrograph Extent Structures Damages Annual Value
$ 110,000
$ 725,000
$ 615,000
-
=
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Conclusion: Wetlands and floodplains mitigate floods
Flooding DamagesWetlands
and Floodplains
• In applying this case study elsewhere, the percent reduction in damages may be more informative than the dollar values presented here.
• Although our modeling approach is simple, our key findings are robust to uncertainties.
• These values warrant the consideration of flood mitigation services in decisions.
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Melillo, J. M., T. Richmond and G. Yohe (2014). Climate Change Impacts in the United States: The Third National Climate Assessment. Washington, DC, U.S. Global Change Research Program: 841.
Murray, Shannon Doocy Amy Daniels Sarah, & Kirsch, Thomas D. The Human Impact of Floods: a Historical Review of Events 1980-2009... http://currents. plos. org/disasters/article/the-human-impact-of-floods-a-his.
FAO-UNESCO, Soil Map of the World, digitized by ESRI. Soil climate map, USDA-NRCS, Soil Science Division, World Soil Resources, Washington D.C.
Thanks and acknowledgements:
Mike Kline (VT DEC)Ned Swawnberg (VT DEC)Arne Bomblies (UVM)Paul Marangelo (TNC) Kim Greenwood (VNRC)Michael Coe (UVM)Chandlee Keirstead (USGS)Richard Kiah (USGS)
USDA- McIntire-StennisCrea Lintilhac Foundation
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0
10
20
30
40
50
60
70
80
-6 -4 -2 0 2 4 6 8 10 12 14 16
Pe
rce
nt
of
Ho
use
Val
ue
Lo
st
Flooding Depth
Flooding Depth (m) % Loss Property Value $ Damage
4.11 62.89 $489800 $308054.30
3.53 55.44 $489800 $271567.19
1.17 24.96 $374300 $93415.46
-3.75 0.00 $753500 $0.00
-0.70 0.00 $335900 $0.00
What is the monetary value of those avoided damages?
1) Property Value
2) Proportion of that value lost
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