Phase 1: Land-use analysis of flash flood risk factors

Phase 1:  Land-use analysis of flash flood risk factors (click for full-sized maps)

Thumbnail of flash flood risk map NLCD
Full Extent: Developed areas derived from NLCD 2011 Land Cover
Thumbnail of flash flood risk map NLCD and LSRs
Full Extent: Developed areas derived from NLCD 2011 Land Cover and Local Storm Reports (LSRs) 2003-2016

 

Close-up views by area: NLCD   Close-up views by area: NLCD and LSRs
thumb of Chicago area
Chicago		 thumb of Madison area
Madison		 thumb of Milwaukee area
Milwaukee		 thumb of Rockford area
Rockford		   thumb of Chicago area with LSRs
Chicago		 thumb of Madison area with LSRs
Madison		 thumb of Milwaukee area with LSRs
Milwaukee		 thumb of Rockford area with LSRs
Rockford
thumb of LOT area
CWA LOT		   thumb of MKX area
CWA MKX		     thumb of LOT area with LSRs
CWA LOT		   thumb of MKX area with LSRs
CWA MKX		  

About the data

The source data for the AFFPI developed areas dataset is the National Land Cover Database 2011 (NLCD 2011), which is provided at a 30-meter resolution.  After extracting the data within our study extent, it was reclassified to three categories:  open water, developed (low, medium or high density developed), and less developed/open space (all other values).  Next, the reclassified dataset was resampled to match the project’s 1-kilometer resolution.  Last, a majority filter was run in order to smooth the final dataset.