Open-File Report 2012–1243
AbstractThe State of Illinois’ annual withdrawl from Lake Michigan is limited by a U.S. Supreme Court decree. The U.S. Geological Survey (USGS) is responsible for monitoring flows in the Chicago area waterway system (CAWS) as part of the Lake Michigan Diversion Accounting (LMDA) overseen by the U.S. Army Corps of Engineers, Chicago District. Every five years, the USGS streamgage practices in the CAWS are reviewed by a committee of practicing engineers and academics to ensure that the best engineering practices are implemented in accordance with the U.S. Supreme Court decree and as part of LMDA. This report provides a perspective on the role of the USGS in LMDA from 1984 to 2010 including the responses to the review committees. Six technical review committees have been convened by the U.S. Corps of Engineers to evaluate the key components of LMDA especially the USGS streamgages within the CAWS. Any changes in streamgaging practices at CAWS gaging stations require detailed analysis to ensure the change will not adversely affect the ability of the USGS to accurately monitor flows. |
First posted March 4, 2013 For additional information contact: Part or all of this report is presented in Portable Document Format (PDF); the latest version of Adobe Reader or similar software is required to view it. Download the latest version of Adobe Reader, free of charge. |
Johnson, K.K., Duncker, J.J., and Jackson, P.R., 2012, The role of the U.S. Geological Survey in Lake Michigan Diversion Accounting in Illinois, 1984–2010: U.S. Geological Survey Open-File Report 2012–1243, 73 p., available at http://pubs.usgs.gov/of/2012/1243.
Abstract
Introduction
A History of Lake Michigan Diversion Accounting
Rating-Curve Development, by Station
Conclusion
References Cited
Appendix 1. 1967 U.S. Supreme Court Decree
Appendix 2. 1980 U.S. Supreme Court Decree
Appendix 3. Water Resources Development Act (WRDA) 1986 (Public Law (PL) 99-662) Section 1142
Appendix 4. Station Descriptions
Appendix 5. Quality-Assurance Plans
Appendix 6. Perl Script for Averaging the Three Velocity Paths