Green Roofs - Living Architecture Monitor - Summer 2020 - 30

stormwater, we estimated the amount of sewage discharge attributable to distinct areas based on data from Open Sewer Atlas NYC.
We also incorporated the Heat Vulnerability Index (Figure 1),
developed by the NYC Department of Health and Mental Hygiene,
which represents how vulnerable communities are to health consequences of heat waves based on demographic and environmental factors. Lastly, we used the Social Vulnerability Index, developed by the
Center for Disease Control and Prevention, which generally reflects
resilience of communities to external stresses.
We scored each factor in a standardized way, and combined
them with equal weight into a single metric. Weights of different
variables could be adjusted based on various considerations; we
even explored omitting the Heat and Social Vulnerability Indices.
While combining these different factors, we considered
how geographic scale influences the results. The tax abatement

names Community Districts (CDs) - local administrative areas
represented by boards of citizens - as the unit for prioritization. As a smaller alternative, we examined Neighborhood
Tabulation Areas (NTAs), which are aggregations of census
tracts that encompass 15,000 people in each. These were developed for planning purposes, but also serve as a practical scale
for analyses such as this.
RESULTS AND TAKEAWAYS
We present a selection of maps to illustrate what prioritization
could look like according to specific combinations of variables
at both CD and NTA scales (Figure 2). Adding heat and social
vulnerability as metrics shifts the areas of greatest need to include more of southern Bronx, northern Manhattan, and eastern
Brooklyn. These areas are generally recognized as including

Figure 2. Maps showing distribution of existing green roofs in NYC (panel a), and potential prioritization schemes for green roofs (panels b, c, and
d). Panel b depicts a prioritization at the scale of community districts based on lack of greenspace and an estimate of combined sewer system
challenges; panel d adds metrics of Heat and Social Vulnerability; and panel c represents a prioritization with all four of these metrics at a smaller
geographic unit, Neighborhood Tabulation Areas. See text for more details on methods.

LIVING ARCHITECTURE MONITOR / SUMMER 2020 / 30

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Green Roofs - Living Architecture Monitor - Summer 2020

Table of Contents for the Digital Edition of Green Roofs - Living Architecture Monitor - Summer 2020

Table of Contents
Green Roofs - Living Architecture Monitor - Summer 2020 - IP
Green Roofs - Living Architecture Monitor - Summer 2020 - Cover1
Green Roofs - Living Architecture Monitor - Summer 2020 - Cover2
Green Roofs - Living Architecture Monitor - Summer 2020 - Table of Contents
Green Roofs - Living Architecture Monitor - Summer 2020 - A
Green Roofs - Living Architecture Monitor - Summer 2020 - 1
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Green Roofs - Living Architecture Monitor - Summer 2020 - Cover3
Green Roofs - Living Architecture Monitor - Summer 2020 - Cover4
Green Roofs - Living Architecture Monitor - Summer 2020 - M1
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https://www.nxtbook.com/dawson/greenroofs/lam_2020Fall
https://www.nxtbook.com/dawson/greenroofs/lam_2020Summer
https://www.nxtbook.com/dawson/greenroofs/lam_2020Spring
https://www.nxtbook.com/dawson/greenroofs/lam_2019Winter
https://www.nxtbook.com/dawson/greenroofs/lam_2019Fall
https://www.nxtbook.com/dawson/greenroofs/lam_2019Summer
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https://www.nxtbook.com/dawson/greenroofs/lam_2018Fall
https://www.nxtbook.com/dawson/greenroofs/lam_2018summer
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https://www.nxtbook.com/dawson/greenroofs/lam_2017winter
https://www.nxtbook.com/dawson/greenroofs/lam_2017fall
https://www.nxtbook.com/dawson/greenroofs/lam_2017summer
https://www.nxtbook.com/dawson/greenroofs/lam_2017Spring
https://www.nxtbook.com/dawson/greenroofs/lam_2016winter
https://www.nxtbook.com/dawson/greenroofs/lam_2016fall
https://www.nxtbook.com/dawson/greenroofs/lam_2016summer
https://www.nxtbook.com/dawson/greenroofs/lam_2016spring
https://www.nxtbook.com/dawson/greenroofs/lam_2015Winter
https://www.nxtbook.com/dawson/greenroofs/lam_2015fall
https://www.nxtbook.com/dawson/greenroofs/lam_2015summer
https://www.nxtbook.com/dawson/greenroofs/lam_2015spring
https://www.nxtbook.com/dawson/greenroofs/lam_2014winter
https://www.nxtbook.com/dawson/greenroofs/lam_2014fall
https://www.nxtbook.com/dawson/greenroofs/lam_2014summer
https://www.nxtbook.com/dawson/greenroofs/lam_2014spring
https://www.nxtbook.com/dawson/greenroofs/lam_2013winter
https://www.nxtbook.com/dawson/greenroofs/lam_2013fall
https://www.nxtbook.com/dawson/greenroofs/lam_2013summer
https://www.nxtbook.com/dawson/greenroofs/lam_2013spring
https://www.nxtbook.com/dawson/greenroofs/lam_2012fall
https://www.nxtbook.com/dawson/greenroofs/lam_2012summer
https://www.nxtbook.com/dawson/greenroofs/lam_2012spring
https://www.nxtbook.com/dawson/greenroofs/lam_2012winter
https://www.nxtbook.com/dawson/greenroofs/lam_2011fall
https://www.nxtbook.com/dawson/greenroofs/lam_2011summer
https://www.nxtbook.com/dawson/greenroofs/lam_2011spring
https://www.nxtbook.com/dawson/greenroofs/lam_2011winter
https://www.nxtbook.com/dawson/greenroofs/lam_2010fall
https://www.nxtbook.com/dawson/greenroofs/lam_2010summer
https://www.nxtbook.com/dawson/greenroofs/lam_2010spring
https://www.nxtbook.com/dawson/greenroofs/lam_2010winter
https://www.nxtbook.com/dawson/greenroofs/lam_2009fall
https://www.nxtbook.com/dawson/greenroofs/lam_2009summer
https://www.nxtbook.com/dawson/greenroofs/lam_2009spring
https://www.nxtbook.com/dawson/greenroofs/lam_2009winter
https://www.nxtbook.com/dawson/greenroofs/lam_2008fall
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