Files in this item



application/pdfISWS-CR-2019-05.pdf (12MB)


application/pdfISWS-CR-2019-05-REVISED.pdf (7MB)
Revised Contract Report 2019-05: April 2019PDF


Title:Frequency Distributions of Heavy Precipitation in Illinois: Updated Bulletin 70
Author(s):Angel, James; Markus, Momcilo
climate change
Geographic Coverage:Illinois
Abstract:This study was designed to update the Illinois State Water Survey (ISWS) Bulletin 70,evaluating rainfall frequency relations in Illinois using current precipitation datasets. The studyprimarily used the National Oceanic and Atmospheric Administration (NOAA) daily precipitationdata from 1948 to 2017 to perform regional frequency analysis (RFA) using the L-momentsapproach. Additional information on precipitation relationships for less than 24 hours wereobtained from NOAA hourly precipitation data from 1948 to 2014 and Cook CountyPrecipitation Network (CCPN) data from 1989 to 2016. Precipitation frequency relations weredeveloped for storm durations from 1 to 240 hours and for recurrence intervals from 2 to 500years. The results are presented for the same 10 geographic sections as in Bulletin 70 (Figure 1) to maintain the continuity of hydrologic studies and compatibility with regulations.
Issue Date:2019-03
Publisher:Illinois State Water Survey
Series/Report:ISWS Contract Report CR-2019-05
Genre:Report (Grant or Annual)
Publication Status:published or submitted for publication
Peer Reviewed:is peer reviewed
Sponsor:Illinois Department of Commerce and Economic Opportunity
Rights Information:Copyright ... University of Illinois Board of Trustees. All rights reserved. This document is a product of the Illinois State Water Survey, and has been selected and made available by the Illinois State Water Survey and the University Library, University of Illinois at Urbana-Champaign. It is intended for research and educational use, and proper attribution is requested.
Date Available in IDEALS:2019-03-13

This item appears in the following Collection(s)

Item Statistics