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21:		Title:	Groundwater availability in Champaign County
		Volume/Number:	1976
		Issuing Agency:
		Description:	An estimated 23.3 million gallons of water is pumped from the aquifers of Champaign County each day to satisfy industrial, municipal, domestic, and rural needs. A much larger quantity of water, perhaps as much as 90 million gallons a day (mgd), could probably be withdrawn without overdevelopment. Maps and tables indicating the probable maximum depths of wells, water levels, chemical quality, and general groundwater conditions for each water-bearing unit at specific locations are presented to serve as a guide in the development and utilization of the groundwater resources of Champaign County.
		Date Created:	5 20 2005
		Agency ID:	C-124
		ISL ID:	000000000742 Original UID: 999999993781 FIRST WORD: Groundwater

22:		Title:	Public ground-water supplies in Illinois
		Volume/Number:	1925
		Issuing Agency:
		Description:	GENTLEMEN : Herewith I submit a report on the ground water resources of the State of Illinois and recommend that it be published as Bulletin No. 21. Since the Directors' report includes a statement of the general activities of all divisions, it has seemed advisable to discontinue the publication of an annual report of this division and to prepare instead summaries of our various investigations as they are completed. This policy was adopted with the publication of Bulletin No. 18 in May of 1922, and has been followed since that date. A portion of this material has appeared in abstract form in annual reports published prior to 1920. That material was too meager and scattered to be of practical value. In the present collected form we believe this data will be of very considerable value to the State of Illinois. Respectfully submitted, A. M. BUSWELL, Chief.
		Date Created:	9 24 2004
		Agency ID:	B-21
		ISL ID:	000000000758 Original UID: 999999992021 FIRST WORD: Public

23:		Title:	Solar energy information and data for Illinois
		Volume/Number:	1978
		Issuing Agency:
		Description:	In the spirit of the State's solar energy focus, and to serve the needs of the publicand those involved in the design and implementation of solar energy systems, we decided to present the readily available weather and climatic data relating to 1) solar energy and 2) the demands for energy. This report is essentially a solar data compendium for Illinois. It contains a minimum of text and consists mainly of tables and graphs, largely assembled from a wide variety of publications (many not easily found).
		Date Created:	9 24 2004
		Agency ID:	C-133
		ISL ID:	000000000759 Original UID: 999999993789 FIRST WORD: Solar

24:		Title:	Verification of the potential yield and chemical quality of the shallow dolomite aquifer in DuPage County, Illinois
		Volume/Number:	1981
		Issuing Agency:
		Description:	Because of its responsibility for allocating the Lake Michigan water which Illinois is permitted to divert from the Great Lakes Basin, the Illinois Division of Water Resources must consider alternative sources of water available to the Chicago metropolitan region. In early 1979, the Division contracted with the Illinois State Water Survey to study the shallow dolomite aquifer in DuPage County, an important alternative source, to verify its potential yield. The plan of the investigation was to analyze the effects of continually increasing pumpage, and to identify areas of existing and potential problems and areas where additional pumpage can be developed. In the summer of 1979, as part of this study, a detailed data collection program in the shallow dolomite was conducted over a 700-square-mile area, shown in figure 1. The area centered on DuPage County but also included parts of west and northwest Cook County, east Kane County, northeast Kendall County, and north Will County. It was bounded on the west by the Fox River and on the east and southeast by the Des Plaines River. Data obtained included pumpage from major water users and more than 1200 water level measurements. In addition, 282 water samples were collected for subsequent analysis.
		Date Created:	5 18 2005
		Agency ID:	C-149
		ISL ID:	000000000760 Original UID: 999999993807 FIRST WORD: Verification

25:		Title:	Detecting drought conditions in Illinois
		Volume/Number:	1987
		Issuing Agency:
		Description:	A major study of Illinois droughts was conducted to develop a basis for quantitative assessments of drought conditions in Illinois. Such information should aid decision making related to local and state actions to ameliorate the effects of future droughts. Those who must deal directly with aspects of drought need to know 1) whether a drought is developing, 2) how severe the drought is at any given time, and 3) how long the drought will last. This report provides information to help address those questions. The report draws upon relevant results of in-depth studies of most critical aspects of drought, including the ways drought is reflected in the major components of the hydrologic cycle. Procedures are given for assessing drought presence and severity in terms of precipitation conditions, soil moisture conditions, shallow groundwater levels, and streamflows. Routine monitoring of these four conditions, coupled with the use of relationships developed in the drought study, serves to detect the onset of droughts in Illinois. Methods for determining the end of drought are not perfect, but the report discusses means by which the termination of drought can be estimated.
		Date Created:	9 24 2004
		Agency ID:	C-169
		ISL ID:	000000000761 Original UID: 999999993827 FIRST WORD: Detecting

26:		Title:	Frequency distributions of heavy rainstorms in Illinois
		Volume/Number:	1989
		Issuing Agency:
		Description:	This publication represents a condensed version of an extensive report on the distributions of heavy rainstorms in Illinois, based on data for 61 precipitation stations operated during 1901-1983. Shown are annual frequency distributions of point rainfall for periods ranging from 5 minutes to 10 days and for recurrence intervals varying from 2 months to 100 years. Results are presented in two forms: mean relations for ten regions of approximately homogeneous precipitation climate, and statewide isohyetal maps based on the 61-station data The report also discusses the results of a special investigation pertaining to Chicago and the surrounding six counties subject to urban influences on the precipitation distribution. The final section of the report provides information on the urban influences on the two Illinois counties adjacent to St. Louis.
		Date Created:	9 24 2004
		Agency ID:	C-172
		ISL ID:	000000000762 Original UID: 999999993832 FIRST WORD: Frequency

27:		Title:	Time distributions of heavy rainstorms in Illinois
		Volume/Number:	1990
		Issuing Agency:
		Description:	This document provides the best available in formation on the time-distribution characteristics of heavy rainstorms at a point and on small basins in Illinois and the Midwest. It is recommended for use in conjunction with Illinois State Water Survey Bulletin 70 and Circular 172 for runoff computations related to the design and operation of runoff control structures. It is also useful for post-storm assessment of individual storm events in weather modification operations. Information is presented in the form of families of curves derived for groups of storms categorized according to whether the greatest percentage of total storm rainfall occurred in the first, second, third, or fourth quarter of the storm period. The time distributions are expressed as cumulative percentages of storm rainfall and storm duration to enable comparisons between storms. The individual curves for each storm type provide estimates of the time-distribution characteristics at probability levels ranging from 10% to 90% of the total storm occurrences. Explanations are provided of how to use the results in design problems.
		Date Created:	9 24 2004
		Agency ID:	C-173
		ISL ID:	000000000763 Original UID: 999999993833 FIRST WORD: Time

28:		Title:	100 - year rainstorms in the Midwest: design characteristics
		Volume/Number:	1993
		Issuing Agency:
		Description:	This document provides pertinent information on the spatial distribution characteristics of extremely heavy rainstorm events in Illinois and the Midwest. Relations were developed for those storms in which maximum rainfall at the center equaled or exceeded the point maximum experienced on the average of once in 100 years or longer. The study was limited to this group of storms because of existing needs for information on these extreme storm events in the design and operation of water control structures in small basins. It is recommended for use in conjunction with Illinois State Water Survey Bulletin 70, Bulletin 71 (Midwestern Climate Center Research Report 92-03), and Water Survey Circular 173 for runoff computations related to the design and operation of runoff control structures in small basins subject to extreme rainfall events. Area-depth relations were derived from information obtained through operation of several dense raingage networks, detailed field surveys and analyses of severe rainstorms in Illinois, analyses of heavy rainstorms in a six-basin hydroclimatic study, and exceptional storms recorded by the climate network of the National Weather Service in Illinois. Using data and information from these sources, curves defining spatial distributions for storms of various areal extent were derived. Results are presented in a form readily adaptable for use by hydrologists or other interested users.
		Date Created:	9 24 2004
		Agency ID:	C-176
		ISL ID:	000000000764 Original UID: 999999993836 FIRST WORD: 100

29:		Title:	Illinois Climate Network: site descriptions, instrumentation, and data management
		Volume/Number:	1994
		Issuing Agency:
		Description:	The Illinois Climate Network (ICN) consists of 19 automated weather stations operated by the Illinois State Water Survey. Stations are located on the University of Illinois Agricultural Experiment Station Farms, the Southern Illinois University Agronomy Experiment Farms, and on community college campuses around the state. The ICN is part of the Water and Atmospheric Resources Monitoring (WARM) Network, which also collects information on soil moisture, groundwater, surface water, and suspended stream sediments. The ICN data have been used for agricultural purposes, such as for irrigation scheduling and to evaluate the progress of insect and crop development during spring and summer. The Illinois Department of Agriculture frequently requests the wind data when evaluating spray drift complaints. The ICN data are also used to assess the potential for using solar radiation and wind as alternative energy sources in Illinois. At each station a 10 meter tower equipped with weather instruments records hourly average air temperature, relative humidity, solar radiation, wind speed and direction, barometric pressure, and soil temperatures at 10 and 20 centimeters. Detailed descriptions of station sites are presented, including areal photographs of a 1,000 meter radius of each station. Hourly wind speed mean and variances were used to estimate the effect of obstructions around the weather towers on wind flow at each tower. Total hourly precipitation and hourly standard deviations of each weather variable are also recorded. The barometric pressure, including hourly maximum and minimum pressures and the time of the maxima and minima, have been recorded since early 1992. Daily data that are saved include maximum and minimum air temperature, maximum and minimum relative humidity, maximum and minimum soil temperatures, maximum wind gusts and direction, and their times of occurrence. The data are automatically retrieved from the stations once each day between midnight and 4:00 a.m. At least three times a week, a database management technician checks the data for quality control, and then the data are made available to the public on the Midwestern Climate Center's Midwestern Climate Information System.
		Date Created:	9 24 2004
		Agency ID:	C-178
		ISL ID:	000000000765 Original UID: 999999993838 FIRST WORD: Illinois

30:		Title:	Water-level trends and pumpage in the deep bedrock aquifers in the Chicago region, 1991 - 1995
		Volume/Number:	1997
		Issuing Agency:
		Description:	The deep bedrock aquifer system in northeastern Illinois is encountered at depths ranging from about 200 feet in areas of central northern Illinois to an average of about 1,000 feet below land surface at Chicago. The aquifers have a collective thickness of 300 to 1,300 feet in the Chicago region, averaging 700 feet. They are composed chiefly of sandstones and dolomites, although most of the water is derived from the sandstone units. Pumpage from deep bedrock wells for public and self-supplied industrial supplies in the Chicago region increased from 200,000 gallons per day (gpd) in 1864 to a peak withdrawal of 182.9 million gallons per day (mgd) in 1979. Between 1991 and 1994, pumpage decreased from 112.7 mgd to 67.1 mgd, mostly due to a shift to Lake Michigan water, particularly in DuPage County. As a result, water levels in deep wells rose between 1991 and 1995, particularly in southern Lake, eastern DuPage, and western Cook Counties. Average annual water-level rises during the four-year period varied from one foot in Kendall County to 38 feet in DuPage County and averaged about 14 feet. This marked the first time that average water-level changes were upward in all eight counties of the Chicago area since detailed record-keeping began in the 1950s.
		Date Created:	9 24 2004
		Agency ID:	C-182
		ISL ID:	000000000766 Original UID: 999999993845 FIRST WORD: Water

31:		Title:	Preliminary report on the ground-water resources of the Havana region in west central Illinois
		Volume/Number:	1965
		Issuing Agency:
		Description:	A large undeveloped ground-water reservoir underlies an area along the Illinois and Sangamon Rivers in west-central Illinois. The area is called the Havana region in this report.This report is based on data collected during the investigation and additional data on file at the Illinois State Water Survey and the Illinois State Geological Survey and in published reports. It presents geologic and hydrologic information, the geologic history of the area, present hydrologic conditions, and effects of possible future development on the ground-water resources of the region. Special emphasis is placed on the extensive unconsolidated sand and gravel deposits, which are the principal aquifers in the region, and their potential yield is evaluated. The geology and hydrology of the bedrock formations are discussed only briefly as these formations contain limited quantities of ground water, and it is of relatively poor quality. Data on water levels, pumpage, well construction features, water temperature, mineral quality of water, well-production and aquifer tests, and other hydrologic information were collected by the State Water Survey. Well logs, drilling samples, geophysical logs, and other geologic information were collected by the State Geological Survey.
		Date Created:	9 24 2004
		Agency ID:	COOP-3
		ISL ID:	000000000767 Original UID: 999999993850 FIRST WORD: Preliminary

32:		Title:	Fox Chain of Lakes investigation and water quality management plan
		Volume/Number:	1977
		Issuing Agency:
		Description:	This report is a cooperative project of the Illinois State Water Survey and StateGeological Survey. Part 1, prepared by the Geological Survey, discusses the geologic history and character of bottom sediments. Parts 2 and 3 were prepared by the Water Survey. Part 2 presents the hydraulic and hydrologic conditions of the Chain. Part 3 discusses the water quality and sources of nutrients and the living organisms. Part 3 also evaluates remedial measures found effective in other locations and proposes a reliable water managementprogram.
		Date Created:	9 24 2004
		Agency ID:	COOP-5
		ISL ID:	000000000768 Original UID: 999999993852 FIRST WORD: Fox

33:		Title:	An initial evaluation of the impact of pesticides on groundwater in Illinois: report to the Illinois legislature
		Volume/Number:	1990
		Issuing Agency:
		Description:	In this report, the Illinois State Geological Survey (ISGS) and the Illinois State Water Survey (ISWS) have responded to the mandate of the Illinois Groundwater Protection Act that the Illinois Department of Energy and Natural Resources (IDENR) evaluate the impact of pesticides upon groundwater. This preliminary evaluation summarizes data on the extent of groundwater contamination by pesticides, identifies agricultural practices that may contribute to groundwater contamination, and presents recommendations to minimize contamination.
		Date Created:	5 20 2005
		Agency ID:	COOP-12
		ISL ID:	000000000769 Original UID: 999999993859 FIRST WORD: An

34:		Title:	Considerations in water use planning for the Fox River
		Volume/Number:	1995
		Issuing Agency:
		Description:	The objectives of this study were to 1) identify locations along the Fox River wherereductions in the flow rate and/or river water quality are likely to degrade any use of water along the river, 2) assess the prevailing water quality and ecology of a critical reach of the river, e.g., from one dam to the other, and 3) estimate and evaluate water supply and water quality conditions at present and in the future.
		Date Created:	9 24 2004
		Agency ID:	CR-586
		ISL ID:	000000000790 Original UID: 999999992166 FIRST WORD: Considerations

35:		Title:	Groundwater discharge to Illinois streams
		Volume/Number:	1980
		Issuing Agency:
		Description:	Driven by the force of gravity, water continually moves between the land surface and the subsurface environments. Our knowledge of this process is limited by the large number of interdependent factors involved. A better understanding of these factors and their effects is needed if we are to effectively manage our water resources in a comprehensive manner.This study addresses the problem by quantifying the groundwater contributionto streamflow over a large range of discharges for 78 watersheds in Illinois.Quantification is the first step toward understanding the dynamics of thiscomplex phenomenon.
		Date Created:	9 24 2004
		Agency ID:	CR-246
		ISL ID:	000000000791 Original UID: 999999993278 FIRST WORD: Groundwater

36:		Title:	The effects of Illinois River traffic on water and sediment input to a side channel
		Volume/Number:	1981
		Issuing Agency:
		Description:	The effects of river traffic on water and sediment inputs into a side channel were studied in an 18-month research project. McEver's Island, located in the Illinois River, was selected as the study site. The objectives of the research project were: 1) to collect data on factors such as suspended sediment load, water discharge, and types of sediment at a reach of a side channel which directly connects with the main river; and 2) to attempt to estimate the rate of movement of the sediment and water into a side channel in different river stages.Observations indicated that the wave height, velocity, and suspendedsediment concentration showed some significant changes during the passagesof barges. The amounts of water and sediment inputs into side channelsare relatively small compared with the background main channel dischargesand sediment loads.
		Date Created:	9 24 2004
		Agency ID:	CR-270
		ISL ID:	000000000792 Original UID: 999999993284 FIRST WORD: The

37:		Title:	Peoria Lake sediment investigation
		Volume/Number:	1985
		Issuing Agency:
		Description:	Realizing the importance of Peoria Lake and the seriousness of the sedimentation problem of the lake, the Illinois State Water Survey initiatedthe Peoria Lake Sediment Investigation under the sponsorship of the U.S. ArmyCorps of Engineers, Rock Island District.The main objectives of the study were to:- Determine the sedimentation rate of the lake- Identify the sources of sediment to the lake and their relativequantities- Develop a sediment budget- Investigate the quality of the sediment in the lake- Investigate a range of alternative solutions to the sedimentationproblem of the lake and make recommendationsThis project will address alternative solutions to the problem of sedimentation in Peoria Lake.
		Date Created:	9 24 2004
		Agency ID:	CR-371
		ISL ID:	000000000793 Original UID: 999999993408 FIRST WORD: Peoria

38:		Title:	Effect of Stratton Dam operation on flood control along the Fox River and Fox Chain of Lakes
		Volume/Number:	1992
		Issuing Agency:
		Description:	The purpose of this study was to use models to simulate the effect of the Stratton Dam operation, and possible structural modifications such as the addition of Foster gates, on flood stages and discharges in the Fox River and the Fox Chain of Lakes. The hydraulics and hydrology of Stratton Dam, the Fox River, and the Chain of Lakes were simulated for a wide range of historical flooding conditions and potential operation schemes. Responses for many different major flood conditions were analyzed, but two particular aspects of flood control were given special attention: 1) increasing outflow from the lakes in anticipation of a major flood, and 2) facilitating the flow release of the lakes by adding Foster gates at Stratton Dam and downstream at Algonquin Dam. This information will provide the IDOT-DWR with information for implementing possible modifications to the Stratton Dam operation during flood conditions.
		Date Created:	9 24 2004
		Agency ID:	CR-533
		ISL ID:	000000000794 Original UID: 999999993570 FIRST WORD: Effect

39:		Title:	Retention of zinc, cadmium, copper, and lead by geologic materials
		Volume/Number:	1982
		Issuing Agency:
		Description:	The vertical and horizontal migration patterns of zinc, cadmium, copper, and lead through the soil and shallow aquifer systems at two secondary zinc smelters were defined by use of soil coring and monitoring well techniques. The vertical migration of the same elements at a third zinc smelter also was defined. The migration of metals at the three smelters has been limited by attenuation processes to relatively shallow depths in the soil profile. Cation exchange and precipitation of insoluable metal compounds, resulting from pH changes in the infiltrating solution, were determined to be the principal mechanisms controlling the movement of the metals through the soil. Increased metal contents in the shallow groundwater systems have been confined to the imnediate plant sites. Soil coring was found to be an effective investigative tool but was not suitable by itself for routine monitoring of waste disposal activities. It should be used to gather preliminary information to aid in determining the proper horizontal and vertical locations for monitoring wells. The analyses of water samples collected in this project generally did not yield a stable, reproducible pattern of results. This indicates the need to develop techniques to obtain representative water samples. The failure of some well seals in a highly polluted environment also indicates the need for additional research into monitoring well construction.
		Date Created:	1 9 2006
		Agency ID:	COOP-9
		ISL ID:	000000000795 Original UID: 999999993856 FIRST WORD: Retention

40:		Title:	Geology, hydrology, and water quality of the Cambrian and Ordovician systems in northern Illinois
		Volume/Number:	1985
		Issuing Agency:
		Description:	Cambrian and Ordovician strata provide much of the groundwater supplyfor approximately 250 municipalities and 150 industries in the northern halfof Illinois. This report represents the cooperative effort of the IllinoisState Water Survey, Illinois State Geological Survey, and U.S. GeologicalSurvey to provide a current hydrogeologic evaluation of this water resource.
		Date Created:	9 24 2004
		Agency ID:	COOP-10
		ISL ID:	000000000796 Original UID: 999999993857 FIRST WORD: Geology,

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