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Title:

GIS-based Method to Assess the Vulnerability of Disadvantaged Populations During Hurricane Evacuation from New Orleans

Accession Number:

01590047

Record Type:

Component

Abstract:

In this paper, the extent to which the potentially transit-dependent portion of the population are vulnerable to the effects of a hurricane are estimated. The vulnerability of an area is defined as a composite measure of the proportion of disadvantaged persons, distance to transit, and flooding potential of people within an area. Unlike past studies which have focused on the vulnerability of the population in relatively large geographic areas, this study estimates the vulnerability of the population in 30m×30m areas as defined in the National Land Cover Database. Population estimates from the national census at block level are disaggregated to the 30m×30m units using a modified dasymetric mapping method in ArcGIS. The modified mapping method assigns population to each small areal unit using weights estimated by regressing the area of each land use in a census block against the population in that block. The coefficients in the regression analysis are "weights" associating population with each land use, and are used to distribute the population in each census block to the small geographic units based on their land use. In a case study of New Orleans, the results show that some areas are not well served by the existing transit pick-up locations, as evidenced by the high vulnerability scores for certain areas. The method appears to be helpful in identifying vulnerable areas that, subsequently, could receive improved hurricane evacuation service in the future.

Supplemental Notes:

This paper was sponsored by TRB committee ABR30 Standing Committee on Emergency Evacuations.

Monograph Accession #:

01584066

Report/Paper Numbers:

16-1906

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Bian, Ruijie
Wilmot, Chester G

Pagination:

19p

Publication Date:

2016

Conference:

Transportation Research Board 95th Annual Meeting

Location: Washington DC, United States
Date: 2016-1-10 to 2016-1-14
Sponsors: Transportation Research Board

Media Type:

Digital/other

Features:

Figures; Maps; References; Tables

Identifier Terms:

National Land Cover Database

Geographic Terms:

New Orleans (Louisiana)

Subject Areas:

Data and Information Technology; Public Transportation; Security and Emergencies; Society; I72: Traffic and Transport Planning

Source Data:

Transportation Research Board Annual Meeting 2016 Paper #16-1906

Files:

TRIS, TRB, ATRI

Created Date:

Jan 12 2016 4:50PM