This annual Water-Data Report for Illinois contains current water year
(Oct. 1, 2004, to Sept. 30, 2005) and historical data of discharge, stage, water
quality and biology of streams; stage of lakes and reservoirs; levels and
quality of ground water; and records of precipitation, air temperature, dew
point, solar radiation, and wind speed. The current year's (2005) data
provided in this report include (1) discharge for 182 surface-water gaging
stations and for 9 crest-stage partial-record stations; (2) stage for 33 surface-water gaging stations;
(3) water-quality
records for 10 surface-water stations; (4) sediment-discharge records for 14 surface-water stations; (5) water-level records for
98 ground-water wells; (6) water-quality records for 17 ground-water wells; (7) precipitation records for
48 rain gages; (8) records of air temperature, dew point, solar radiation
and wind speed for 1 meteorological station; and (9) biological records for 6 sample sites. Also included are miscellaneous data collected at various
sites not in the systematic data-collection network.
Data were collected and compiled as a part of the National Water Information
System (NWIS) maintained by the U.S. Geological Survey in cooperation with
Federal, State, and local agencies.
This series of Water-Data Reports for Illinois began with the 1961 water year with a report that contained only data relating to the quantities of surface water. For the 1964 water year, a similar report was introduced that contained only data relating to water quality. Beginning with the 1965 water year, the report format was changed to include data on quantities of surface water, quality of surface water and ground water, and ground-water levels. Because of the increase in hydrologic data collected in Illinois, a two-volume format was published for water years 1978 to 1997. Greater requests for hydrologic data in electronic format and the addition of meteorological and biological data to the report have shown a need to provide data in an electronic report. Beginning in 1998, hydrologic data were published on the Web and on compact disc.
Prior to introduction of this series and for 10 water years (1961-70) concurrent with it, water-resources data for Illinois were published in USGS Water-Supply Papers. Data on stream discharge and stage and on lake or reservoir content and stage, through September 1960, were published annually under the title "Surface-Water Supply of the United States, Parts 3A, 4, and 5." For the 1961-70 water years, the data were published in two 5-year reports. Data on chemical quality, temperature, and suspended sediment for the 1941-70 water years were published annually under the title "Quality of Surface Waters of the United States," and water levels for the 1935-74 water years were published under the title "Ground-Water Levels in the United States." The above mentioned Water-Supply Papers may be found in the libraries of major cities of the United States and may be purchased from U.S. Geological Survey, Information Services, Denver Federal Center, Box 25286, Denver, CO 80225-0286.
Publications similar to this report are published annually by the USGS for all States. These USGS reports have an identification number consisting of the two-letter State abbreviation, the last two digits of the water year, and the volume number (when applicable). For example, Volume 1 of Illinois' 1997 report is identified as "U.S. Geological Survey Water-Data Report IL-97-1." For archiving and general distribution, the reports for 1961 to current are identified as Water-Data Reports. These Water-Data Reports are for sale in paper copy or microfiche by the National Technical Information Service, U.S. Department of Commerce, Springfield, VA 22161.
Additional information for ordering specific reports may be obtained from the USGS Illinois Water Science Center at the address given in the section titled "Access to USGS Water Data" or by telephone at (217) 344-0037.
Water-resources data, including those provided in water-data reports, also
are available through the World Wide Web on the Internet. The Universal Resource
Locator (URL) to the USGS Illinois Water Science Center's home page is http://il.water.usgs.gov/.
Table of Contents |
Introduction |
Station Description |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |