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Impacts of Sea Level Rise at the
U.S. Naval Academy
Midn 1/C Miranda Kosmides,
Midn 1/C Nicholas Padgett,
CDR Angela Schedel,
CDR John Schedel
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Overview
History of USNA
Extreme Floods
Nuisance Floods
Future Floods
Flood Protection and Adaptations
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U.S. Naval Academy Location
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USNA – Growth
1956-1960: added 60 acres
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USNA – Growth
Campus Today – 338 acres
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USNA – 2003 TS Isabel
https://www.wunderground.com/wximage/awalex/0
/
Tropical Storm Isabel
19 Sep 2003
4 hours (5 inches) prior
to peak water level
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Nuisance Floods in Annapolis
Source: Sweet et al. (2014), NOAA (2017)
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Nuisance Floods in Annapolis
Source: Sweet et al. (2014), NOAA (2017)
• Averaged 3.6 minor
flood days per year
during 1957-1963
• ~ 34 days per year
during 2006-2010
• ~ 40 days per year
during 2010-2016
(max of 66 in 2011)
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Nuisance Floods at USNA
9 Feb 2016 - 3.4 ft above
MLLW
(Nuisance flood = 2.4 ft
above MLLW)
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Nuisance Floods at USNA
5 Sep 2016 – 2.8 ft above
MLLW
(Nuisance flood = 2.4 ft
above MLLW)
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Nuisance Floods at USNA
23 Oct 17 - 3.6 ft above
MLLW
(Nuisance flood = 2.4 ft
above MLLW)
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Local Sea Level Rise Scenarios
Source: Hall et al. (2016) and Sweet et al. (2017)
NOAA Annapolis Monthly Mean Sea Level Data for 1930-2016
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Local Sea Level Rise Scenarios
0.000
1.000
2.000
3.000
4.000
5.000
6.000
7.000
8.000
1990 2000 2010 2020 2030 2040 2050 2060 2070 2080 2090 2100
Fee
t A
bo
ve M
ean
Se
a Le
vel
Ramsay Rd, McNair Rd,City Dock
New Construction
Mid Store Lot,Holloway Rd
Isabel
Hospital Point, Dewey Field,Gate 1
Note: Increases in MSL may not be as smooth as depicted, especially for highest scenario (when most SLR would occur beyond 2070)
Source: Hall et al. (2016). Referenced to MSL for 1986-2001 (MSL = 0 in 1992)
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Current USNA Flood Protection
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Examples of USNA Adaptation
• Field House with indoor track built in 2008
• Elevated entrances and first-floor openings
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Examples of USNA Adaptation
• Elevated entrances and first-floor openings
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Examples of USNA Adaptation
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Examples of USNA Adaptation
• New
academic
building
under
construction
• Elevated
main
entrances
• Minimal
first-floor
openings
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Pilot Project - Columbarium
• Conceptual
design in
work by
students
• Reduction of
nuisance
floods
• Various
alternatives
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Pilot Project - Columbarium
Current road elevation could potentially have 217
occurrences of nuisance flooding by 2100.
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Raising the road
just 1.0 ft would
reduce flooding
to only 10
occurrences per
year by 2100
Pilot Project - Columbarium
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Pilot Project - Columbarium