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Urban Flood Susceptibility Index, Northeastern Illinois [CMAP (Chicago Metropolitan Agency for Planning) Data Hub] {2017}

Chicago Metropolitan Agency for Planning · 2017 Full Details

Full Details

Title
Urban Flood Susceptibility Index, Northeastern Illinois [CMAP (Chicago Metropolitan Agency for Planning) Data Hub] {2017}
Description
CMAP developed theStormwater and Flooding Strategy Paperwhich informs recommendations made in theON TO 2050 comprehensive planto address urban and riverine flooding. The paper presents strategies to reduce flooding impact throughout the region by integrating stormwater management into transportation and land use planning, alongside analysis of damages from past flooding events.To help direct these strategies, CMAP developed urban and riverine Flooding Susceptibility Indexes (FSIs) to identify priority areas across the region for flooding mitigation activities. GIS datasets representing flood susceptibility factors were used to construct the indexes by assessing each factor's influence using a GIS-based frequency ratio approach. The approach, inputs, and results are described in greater detail in the technical appendix of the strategy paper. The values in the raster attribute tables represent low (1) to high (10) flood susceptibility.The inputs are listed below, alongside their sources:Flood locations from FEMA, several counties, and the City of ChicagoTopographic Wetness Index (TWI), Urban Only CMAP derived from 5-ft resolution Digital Elevation Model (DEM)Combined sewer service area, received from MWRD and municipalitiesElevation differential between property and nearest FEMA Base Flood Elevation (BFE), Urban onlyPercent Impervious Cover from 2011 National Land Cover DatasetAge of first development from USGS 1974-2012 land use trends dataset, using developed land classesPrecipitation variation, precipitation amounts (inches) for the 10-year, 2- hour storm from NOAA Atlas 14
Creator
Chicago Metropolitan Agency for Planning
Temporal Coverage
2017
Date Issued
2023-06-08
Access Rights
Public
Format
File
Language
English
Date Added
August 28, 2025

Location

Links

Cite and Reference

  • Citation
    Chicago Metropolitan Agency for Planning (2023). Urban Flood Susceptibility Index, Northeastern Illinois [CMAP (Chicago Metropolitan Agency for Planning) Data Hub] {2017}. . https://datahub.cmap.illinois.gov/maps/CMAPGIS::urban-flood-susceptibility-index-northeastern-illinois-2017 (web service)
  • BTAA Geoportal Link

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