Geo-Spatial Analysis of Built-Environment Exposure to Flooding: Iowa Case Study

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Authors

Yazeed Alabbad, Ibrahim Demir

Abstract

Flooding is the most frequent type of natural disaster, inducing devastating damages at large and small spatial scales. Flood exposure analysis is a critical part of flood risk assessment. While most studies analyze the exposure elements separately, it is crucial to perform a multi-parameter exposure analysis and consider different types of flood zones to gain a comprehensive understanding of the impact and make informed mitigation decisions. This research analyzes the population, properties, and road networks exposed to the 100, 200, and 500-year flood events at the county level in the State of Iowa using geospatial analytics. We also proposed a flood exposure index at the county level using fuzzy overlay analysis to help find the most impacted county. During flooding, results indicate that the county-level percentage of displaced population, impacted properties, and road length can reach up to 46%, 41%, and 40%, respectively. We found that the most exposed buildings and roads are laid in residential areas. Also, 25% of the counties are designated as very high-exposure areas. This study can help many stakeholders identify vulnerable areas and ensure equitable distribution of investments and resources toward flood mitigation projects.

DOI

https://doi.org/10.31223/X5C08V

Subjects

Civil and Environmental Engineering, Civil Engineering, Engineering, Risk Analysis

Keywords

flood exposure, geospatial analysis, floods, fuzzy overlay analysis, Geospatial Analysis, floods, fuzzy overlay analysis

Dates

Published: 2023-03-15 17:18

Last Updated: 2023-03-15 17:18

License

CC BY Attribution 4.0 International

Additional Metadata

Conflict of interest statement:
None

Data Availability (Reason not available):
all data used during the study are shared in the manuscript.