The Shifting Impact of Recurrent Flooding on Transportation Accessibility: A Case Study of Affected Populations in The Hampton Roads Region
arxiv(2024)
摘要
Accelerated sea level rise has resulted in recurrent flooding in coastal
regions, increasingly impacting both transportation systems and local
populations. Using the Hampton Roads region in Virginia as a case study, this
study a. identifies hotspots with frequent, significant accessibility reduction
for work and nonwork travel utilizing crowdsourced WAZE flood report data
during the month of August over 5 years: 2018 to 2022; and b. examines the
shifts in social vulnerability in populations residing in these hotspots over
the 5 year period using 2016 and 2021 American Community Survey data. Results
show that approximately 12 percent and 3 percent of the population of the
region reside in hotspots experiencing significant recurrent flooding-induced
accessibility reduction for work and nonwork trips. Social vulnerability
analysis revealed that populations with greater socioeconomic and
transportation vulnerabilities are more susceptible to recurrent flooding
induced accessibility impacts in terms of both extent and frequency.
Furthermore, a comparison of social vulnerability indices between 2016 and 2021
shows an increasing trend of social vulnerability for highly impacted zones,
with low income, disabled, and households with young children having restricted
ability to relocate from these zones. The findings reinforce the necessity for
spatially and temporally disaggregated studies of climate event impacts.
Furthermore, the longer term population trends highlight the importance of
dynamic assessment of climate event impacts at different time scales.
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