7. Based upon August 2013 1% Flood FEMA Flood Elevations (Zone AE, AO, and
VE), this study combines spatial datasets from:
• NYC Open Data
• The City of New York Planning Department
• Citywide Administrative Districts
• Land Use Zoning
• Primary Land Use Tax Lot Output (PLUTO)
• The City of New York Department of Finance
• FY 2014 Final Assessment Roll
• Federal Government
• 2010 Census Block Groups
• 2012 Census Estimates for Total Population
• 2010 US Census Summary File One
•Note: The estimates and maps in this document are for a high level discussion
Study Methodology and Data Sources
9. New York City
100 Year Flood Plain Scenario
FEMA Base Flood Elevation
Total Affected Land Mass:
47 Square Miles
or 16 percent of Total City Land Mass
Source: NYC OpenData
Land Area Under
1% Base Flood Elevation
10. New York City
What does 47 square miles look like?
36 Central Parks (1.3 sq miles)
About 1 City of San Francisco
(49.9 sq miles)
Source: Google Maps
11. New York City by Borough
Today
Total Land Area (in square miles):
Borough
Total
Land Area
% of Total
Land Area
Bronx 43 14%
Brooklyn 70 23%
Manhattan 23 8%
Queens 109 36%
Staten
Island 58 19%
Total 303 100%
Source: NYC OpenData
12. New York City by Borough
1 Percent Flood Elevation Scenario
FEMA Base Flood Elevation
Borough
Area
(in
Square
Miles)
Area
under
Flood
Elevation
% of Total
Land Mass
Staten
Island 58 11 19.5%
Queens 109 17 15.8%
Brooklyn 70 11 16.3%
Manhattan 23 3 14.0%
Bronx 43 4 9.9%
Total 303 47 15.7%
Source: NYC OpenData
13. New York City by Dominant Zoning
Today
Type of Dominant
Land Use Zoning
% of Land
Mass
Battery Park City 0.0%
Commercial 4.8%
Manufacturing 14.1%
Park/Recreational 13.4%
Residential 67.7%
Grand Total 100.0%
Source: NYC OpenData
14. New York City by General Land Use Zoning
Today
Source: NYC OpenData
15. New York City by General Land Use Zoning
Under 1% Flood Elevation
Source: NYC OpenData
16. New York City by Zoning
Under 1% Flood Elevation
Source: NYC OpenData
17. New York City by General Land Use Zoning
Area Under 1% Flood Elevation by Total Zoning Percentage
Note: There is a slight (~1%) data variation in land mass
between Zoning and Land Mass data layers
Source: NYC OpenData
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
Total Area Under a 1%
Floodplain
18. New York City by General Land Use Zoning
Area Under 1% Flood Elevation by Square Feet
-
50,000,000
100,000,000
150,000,000
200,000,000
250,000,000
300,000,000
350,000,000
400,000,000
Area Under a 1% Floodplain
Note: There is a slight (~1%) data variation in land mass
between Zoning and Land Mass data layers
Source: NYC OpenData
19. General Land Use (in Square feet)
Area Under a 1%
Flood Elevation Total %
Large Open Amusement Parks 1,717,679 1,863,201 92%
Waterfront Recreational Activities 9,927,306 18,569,273 54%
Light and Heavy Industrial Areas 219,266,535 413,720,947 53%
Park 314,966,666 1,095,637,163 29%
Battery Park City 1,041,830 3,945,625 26%
Manufacturing with 1 or 2 story warehouses
characterized by loading bays 115,859,696 764,622,857 15%
Bridging Commercial and Manufacturing Uses 11,878,955 101,772,574 12%
One and Two Family Houses 375,105,007 3,458,333,644 11%
High-Bulk Commercial Uses Requiring a Central
Location 9,431,704 87,373,608 11%
Regional Commercial Centers 14,629,831 142,373,433 10%
Lower-Density Residence Districts 56,915,927 753,243,056 8%
Central Commercial District 2,717,653 36,540,297 7%
High Density Residential 2,008,334 28,313,991 7%
Moderate- and higher-density residence districts 85,735,882 1,410,707,934 6%
Commercial Districts (Predominant Residential) 1,660,534 29,483,626 6%
Total* 1,222,863,540 8,346,501,231 14.7%
New York City by General Land Use Zoning
Area Under 1% Flood Elevation by Square Footage
Note: There is a slight (~1%) data variation in land mass
between Zoning and Land Mass data layers
Source: NYC OpenData
20. Source: NYC PLUTO
• Number of Properties:
64,600 or 7.5% of all properties
in the City of New York
• Number of Housing Units:
325,000 units or 9% of total City
Stock
New York City Properties
Under 1% Flood Elevation
85
1,191
7,333
15,532
20,666
7,080
4,678
8,793
-
5,000
10,000
15,000
20,000
25,000 Buildings in Flood Elevation by Year Built
21. New York City Individual Landmarks
Under 1% Flood Elevation
Lower Manhattan
And Northeastern
Brooklyn Inset
• 8 percent of Designated Individual
Landmarks
Source: NYC PLUTO
22. Source: NYC Pluto, NYTimes
Full Value of all Properties in New
York City: $1 trillion
Full Value of Properties under a 1%
Flood Elevation: $111 billion
NYC Climate Adaptation Plan
Estimated Costs: $20 billion
New York City Property Values
Under 1% Flood Elevation
23. Source: 2010 US Census with 2012
Population Projections
2012 Total Population of New York City: 8.3 million
2012 Total Population living in an 1% Flood Zone in New
York City: 1.3 million
23% of Total Population Living under the Flood
Elevation is Hispanic vs 18% of Total NYC
60% of Total Households Living under the Flood
Elevation are renters vs 47% of Total NYC
New York City Population
Under 1% Flood Elevation
Legend
2012 Total Population by Census Block
0 - 1,000
1,001 - 2,000
2,001 - 2,500
2,501 - 5,000
5,001 - 11,095
24. Source: New York City Population
Projections by Age/Sex & Borough Briefing Booklet, 2006
Gehry Towers
76 stories, 903
apartments
At 1,000,000 new
residents
~438 towers
At 800,000 new residents
~263 towers
97 Orchard Street
6 stories, 20
apartments
At 1,000,000 new
residents
~19,608 buildings
At 800,000 new
residents
~15,686 buildings
More People on Less Land
By 2030, New York City is projected to grow by 1,000,000 people
25. Source: PlanNYC. Coastal
Protection,
A Stronger, More Resilient New
York, p.45
2050: 72 square miles of New York City
is in a 100 year floodplain
1983: 33 square miles of New York City
Is in a 100 year floodplain
New York City
Floodplains in the Future
26. New York City
1% Floodplains in the Future
2020s
Source: NYC OpenData
27. New York City
1% Floodplains in the Future
2050s
Source: NYC OpenData
28. New York City
1% Floodplains in the Future
2080s
Source: NYC OpenData