Flood Risk and Resilience: Piermont

8/10/2019 Flood Risk and Resilience: Piermont

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FLOOD RISK and RESILIENCE:

PIERMONT


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THE HUDSON RIVERA COASTAL, TIDAL

RIVER

!The Hudson River is anarm of the Atlantic Ocean

!The river tidal to thefederal dam in Troy

!All of the Hudsonsshorelines are subject tocoastal hazards


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COASTAL HAZARDS

!TIDES & WAVES

!

STORM SURGES

!EROSION

!FRESHWATERTRIBUTARY FLOODING


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COASTAL HAZARD:Coastal Inundation


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2012: HURRICANE SANDY

!7+ ft Storm Surge

!

140+ structures impacted

!$20M+ in damages


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COASTAL HAZARD:Coastal Inundation

11.5 ft. Storm Tide

2 ft. Normal High Tide9.5 ft. Storm Surge

Mean Sea Level


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COASTAL HAZARD:Freshwater Tributary Flooding


8/19FLOOD RISK MAPPING

1% Zone


9/19FLOOD RISK MAPPING


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! #$%$&' #$()#

! !"#$%& ()*+, )$ %*+, -./0)10+, 203& 3 4+&2",5 31%

!

.-$2 6+&2",5 78( )$ 9"409%,+ ,3:)# 3 $++9$ 2%;+ 344+?

/000 . /0**1 -23-44567


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SEA-LEVEL RISE & STORM SURGE


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CLIMATE CHANGE

SEA LEVEL RISE PROJECTIONS FOR HUDSONRIVER

Low Estimate(10thpercentile)

Middle Range(25-75thpercentile)

High Estimate(90thpercentile)

2020s 2 4-8 10

2050s 8 11-21 30

2080s 13 18-39 58

2100s 15 22-50 75

B $= $=CD?E AE F@E?;


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2

source: Climate Central


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FUTURE FLOOD RISKS


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FUTURE FLOOD RISKS

People at Risk Land at risk (acres)Households at Risk

HOUSEHOLDS PEOPLE LAND acres

at risk from floodingat risk from daily tidal inundation Amount of Sea Level Rise


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FUTURE FLOOD RISKS

COAST Model for Piermont

Modeled Water Levels and Vulnerability Assessment ResultsFor the 100 Year Storm with Sea Level Rise in the Years

2025, 2055 and 2100

Expected Damag Values to Buildings

(in $ Millions)

nd Improvements

Year Projected sea levelrise

Number of TaxParcels Affected

From a Single StormIn This Year

PermanentlyInundated by SLR

Cumulative from

SLR and All Storms

Up To This Year

2025 10" 24 26.7 2.6 18.9

2055 29" 87 35.7 17.9 70.8

2100 72" 178 56.7 60.4 192.2

-


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Village of Piermont

Town of Orangetown

Town of Orangetown

Village of Tarrytown

Village of Grandview-on-Hudson

Village of Irvington

50 2,9001,450

Feet

!

!

!

Albany

New York

Poughkeepsie

Summary of Village of Piermont

How Will It Impact Your Community?

Hudson River Sea Level RiseVi l lage of Piermont

Inundation Modelinghe Hudson Is Rising

ea Level Rise Time Frame

Hudson River Sea Level Rise Projections (in.)

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Flood Risk and Resilience: Piermont

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