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Publication Abstract

Continued Operation of a 25-Raingage Network for Collection, Reduction, and Analysis of Precipitation Data for Lake Michigan Diversion Accounting Water Year 2016 Bauer, Erin, Nancy Westcott, 2017  Illinois State Water Survey, Champaign, IL,  ISWS CR 2017-03    Full Text Available

A dense raingage network has operated in Cook County since the fall of 1989 to provide accurate precipitation measurements for use in simulating runoff for Lake Michigan diversion accounting. This report describes the network design, the operations and maintenance procedures, the data reduction and quality control methodology, and an analysis of precipitation for WY 2016 (October 2015–September 2016). The data analyses include: 1) monthly and WY 2016 amounts at all sites, 2) WY 2016 amounts compared to patterns from network WYs 1990–2015, and 3) the 26-year network precipitation average for WYs 1990–2016. Also included are raingage site descriptions, instructions for raingage technicians, documentation of raingage maintenance, and documentation of high storm totals.

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