Social and Heat Vulnerability Indices in Phoenix, Arizona
Author(s):
- Mary Wright, Arizona State University
- Lance Watkins, Arizona State University
- David Hondula, Arizona State University
- Liza Kurtz, Arizona State University
- Paul Chakalian, Arizona State University
- Sharon Harlan, Northeastern University
- Juan Declet-Barreto, Union of Concerned Scientists
Abstract:
Vulnerability indices and maps are commonly employed by researchers and practitioners to assess hazard risk by combining variables that are theoretically or empirically associated with hazard outcomes and spatially visualizing those combined variables. For this dataset, we followed established methods to produce two vulnerability indices for 358 census tracts in the City of Phoenix, Arizona for the year 2016: the all-hazards Social Vulnerability Index (SoVI) and a specific hazards Heat Vulnerability Index (HVI). For SoVI, we compiled 27 social variables from the 2012-2016 American Community Survey (ACS); for HVI, we compiled seven social variables from the 2012-2016 ACS, one variable regarding residential air conditioning prevalence from the Maricopa County Assessor’s Office, and two variables related to vegetation density from Landsat 8 remote sensing imagery. Lastly, we conducted principal components analysis on each of the indices respective variables and then summed the resulting component scores for each census tract to produce the index values which we then spatially joined to the Phoenix census tracts.
Keywords:
Temporal Coverage:
2012-01-01 to 2016-12-31Geographic Coverage:
Geographic Description: census tracts that are within or intersect with the City of Phoenix, Arizona boundaryBounding Coordinates:
Longitude:-112.36 to -111.92
Latitude:34.05 to 33.29
Contact:
Information Manager, Central Arizona–Phoenix LTER,Arizona State University,Global Institute of Sustainability,Tempe
caplter.data@asu.edu
Methods used in producing this dataset: Show
Data Files (5) :
Tabular: 665_HVI_PCAloadings_Phoenix_2016_a07b9cae32084199ddcc07bd5787c608.csv
Description: contains varimax rotated component loadings for three component PCA solution of HVI variables for Phoenix census tracts. Also contains eigenvalues and cumulative variance of each component
Column | Description | Type | Units |
---|---|---|---|
Variable | Variables used to calculate HVI, including eigenvalues and cumulative variance from PCA results |
string | |
RC1 | Rotated component loadings for component 1 (eigenvalues and cumulative variance in bottom rows) |
float | dimensionless |
RC3 | Rotated component loadings for component 2 (eigenvalues and cumulative variance in bottom rows) |
float | dimensionless |
RC2 | Rotated component loadings for component 3 (eigenvalues and cumulative variance in bottom rows) |
float | dimensionless |
Tabular: 665_HVI_Phoenix_tracts_2016_6333b3c59a427ee93eeb218fd75b2015.csv
Description: values of variables used to calculate the Heat Vulnerability Index (HVI) for Phoenix, Arizona in 2016 by census tract. Also includes rotated component scores of PCA three component solution and final HVI value for each census tract
Column | Description | Type | Units |
---|---|---|---|
GEOID | unique ID for U.S. Census tracts |
string | |
TOTAL_POPULATION | total population of individuals in census tract |
float | number |
Qminority | Ethnic minority |
float | dimensionless |
Qhisplati_imm | Latino immigrant |
float | dimensionless |
Qpoverty | Below federal poverty line |
float | dimensionless |
QnoDiploma | No high school diploma |
float | dimensionless |
Qsenior | More than 64 years of age |
float | dimensionless |
QseniorAlone | More than 64 years of age and living alone |
float | dimensionless |
Qalone | Living alone |
float | dimensionless |
noAC | No central air conditioning |
float | dimensionless |
ndvi_mean | Normalized Difference Vegetation Index mean |
float | dimensionless |
ndvi_sd | Normalized Difference Vegetation Index standard deviation |
float | dimensionless |
RC1 | Rotated component score for component 1 |
float | dimensionless |
RC3 | Rotated component score for component 3 |
float | dimensionless |
RC2 | Rotated component score for component 2 |
float | dimensionless |
HVI | Heat Vulnerability Index value |
float | dimensionless |
Tabular: 665_SOVI_PCAloadings_Phoenix_2016_cba64a20117b5baab5b044976cf76aeb.csv
Description: contains varimax rotated component loadings for six component PCA solution of SoVI variables for Phoenix census tracts. Also contains eigenvalues and cumulative variance of each component
Column | Description | Type | Units |
---|---|---|---|
Variable | Variables used to calculate SoVI, including eigenvalues and cumulative variance from PCA results |
string | |
RC1 | Rotated component loadings for component 1 (eigenvalues and cumulative variance in bottom rows) |
float | dimensionless |
RC2 | Rotated component loadings for component 2 (eigenvalues and cumulative variance in bottom rows) |
float | dimensionless |
RC3 | Rotated component loadings for component 3 (eigenvalues and cumulative variance in bottom rows) |
float | dimensionless |
RC4 | Rotated component loadings for component 4 (eigenvalues and cumulative variance in bottom rows) |
float | dimensionless |
RC5 | Rotated component loadings for component 5 (eigenvalues and cumulative variance in bottom rows) |
float | dimensionless |
RC6 | Rotated component loadings for component 5 (eigenvalues and cumulative variance in bottom rows) |
float | dimensionless |
Tabular: 665_SOVI_Phoenix_tracts_2016_b7131d39acc3c84f1286485388ef9503.csv
Description: values of variables used to calculate the Social Vulnerability Index (SoVI) for Phoenix, Arizona in 2016 by census tract. Also includes rotated component scores of PCA six component solution and final SoVI value for each census tract.
Column | Description | Type | Units |
---|---|---|---|
GEOID | unique ID for U.S. Census tracts |
string | |
TOTAL_POPULATION | total population of individuals in census tract |
float | number |
MDGRENT | Median gross rent for renter-occupied housing units |
float | dollar |
MEDAGE | Median age |
float | number |
MHSEVAL | Median dollar value of owner-occupied housing units |
float | dollar |
PERCAP | Per capita income |
float | dollar |
PPUNIT | Average number of people per household |
float | number |
QAGEDEP | % Population under 5 years or age 65 and over |
float | dimensionless |
QASIAN | % Asian population |
float | dimensionless |
QBLACK | % African American (Black) population |
float | dimensionless |
QCVLUN | % Civilian labor force unemployed |
float | dimensionless |
QED12LES | % Population over 25 with less than 12 years of education |
float | dimensionless |
QESL | % Population speaking English as a second language with limited English proficiency |
float | dimensionless |
QEXTRCT | % Employment in extractive industries (fishing, farming, mining, etc.) |
float | dimensionless |
QFAM | % Children living in married couple families |
float | dimensionless |
QFEMALE | % Female |
float | dimensionless |
QFEMLBR | % Female participation in the labor force |
float | dimensionless |
QFHH | % Families with female-headed households with no spouse present |
float | dimensionless |
QHISP | % Hispanic population |
float | dimensionless |
QMOHO | % Population living in mobile homes |
float | dimensionless |
QNATAM | % Native American population |
float | dimensionless |
QNOAUTO | % Housing units with no car available |
float | dimensionless |
Qdisab | % Population with disability |
float | dimensionless |
QPOVTY | % Persons living in poverty |
float | dimensionless |
QRENTER | % Renter-occupied housing units |
float | dimensionless |
QRICH200 | % Families earning more than $200,000 per year |
float | dimensionless |
QSERV | % Employment in service occupations |
float | dimensionless |
QSSBEN | % Households receiving Social Security benefits |
float | dimensionless |
QUNOCCH | % Unoccupied housing units |
float | dimensionless |
RC1 | Rotated component score for component 1 |
float | dimensionless |
RC2 | Rotated component score for component 2 |
float | dimensionless |
RC3 | Rotated component score for component 3 |
float | dimensionless |
RC4 | Rotated component score for component 4 |
float | dimensionless |
RC5 | Rotated component score for component 5 |
float | dimensionless |
RC6 | Rotated component score for component 6 |
float | dimensionless |
SOVI | Social Vulnerability Index value |
float | dimensionless |
File: 665_SOVI_HVI_Phoenix_tracts_2016_GIS_aab154320c93fef54eac8fb8913b2902.kml
Description: two vulnerability indices for 358 census tracts in the City of Phoenix, Arizona for the year 2016: (1) the all-hazards Social Vulnerability Index (SoVI) and (2) a specific hazards Heat Vulnerability Index (HVI)