Characterizing Uncertainty in the Intersection of Social Vulnerability and Flood Risk

Authors: Katherine Nelson*, Kansas State University
Topics: Hazards and Vulnerability, Quantitative Methods
Keywords: social vulnerability, flood risk
Session Type: Virtual Paper
Day: 4/8/2021
Start / End Time: 8:00 AM / 9:15 AM
Room: Virtual 26
Presentation File: No File Uploaded

Recognizing the differential impacts of flooding on different populations, social vulnerability mapping is now commonly employed to identify where flood risks intersect with vulnerable populations. However, the findings of analyses examining these intersections between flooding and social vulnerability vary greatly across types of social vulnerability index, types of flood model, and spatial scales of analysis. This work attempts to quantify the scale-based uncertainty associated with characterization of the social vulnerability of populations subject to flood risk. First, we explore how measures of social vulnerability, created using the same information and techniques, vary and alter our understanding of vulnerability across and within areas when the spatial resolution and extent of the data are changed. Second, we examine how different spatial coincidence methods change our representation of socially vulnerable populations at flood-risk. Finally, we describe the uncertainty associated with the intersection of these two facets and discuss the implications for vulnerability planning and assessment.

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