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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 2014 Westcott, Nancy, 2015  Illinois State Water Survey, Champaign, IL,  ISWS CR 2015-01    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 Water Year 2014 (October 2013–September 2014). The data analyses include: 1) monthly and Water Year 2014 amounts at all sites, 2) Water Year 2014 amounts in comparison to patterns from network Water Years 1990–2013, and 3) the 24-year network precipitation average for Water Years 1990–2014. Also included are raingage site descriptions, instructions for raingage technicians, documentation of raingage maintenance, and documentation of high storm totals.

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