Organization | • | Illinois State Water Survey | [X] |
| | 301: | | Title: | | | | | Volume/Number: | 1992 | | | | Issuing Agency: | | | | | Description: | In the Illinois Groundwater Protection Act of 1987 (PA 85-863), the state legislature mandated that the Illinois Department of Energy and Natural Resources (DENR) conduct an "ongoing program of basic and applied research relating to groundwater," including an evaluation of pesticide impacts upon groundwater. "Such evaluation shall include the general location and extent of any contamination of groundwaters resulting from pesticide use. . . . Priority shall begven to those areas of the State where pesticides are utilized most intensively." In response to this mandate, the Illinois State Water Survey (ISWS) and the Illinois State Geological Survey (ISGS), divisions of DENR, developed a plan to assess the occurrence of agricultural chemicals in rural, private wells on a statewide basis (McKenna et al. 1989). In response to the concerns regarding the proposed statewide survey, a separate pilot study was designed, based on the recommended statewide survey, to produce tangible, documented results of well-water sampling and to demonstrate the validity of the survey design.The legislative mandate addressed the pesticide impacts on groundwater. The proposed statewide plan and the pilot study will focus on groundwater drawn from rural, private wells. This approach will maximize data acquisition on the potential for exposure of the rural residents of Illinois to agricultural chemicals (pesticides and nitrogen fertilizers) through drinking water; it will also minimize sample collection costs. Inferences drawn from this project are valid for groundwater drawn from rural, private wells and not from other sources. | | | | Date Created: | 9 24 2004 | | | | Agency ID: | COOP-14 | | | | ISL ID: | 000000000826 Original UID: 999999993861 FIRST WORD: Pilot | |
| 302: | | Title: | | | | | Volume/Number: | 2001 | | | | Issuing Agency: | | | | | Description: | Demand for water in Illinois is increasing, and water shortages in the Chicago metropolitan area have been projected. There are, however, limits to the availability of clean water at a reasonable cost. Limitsto water availability are imposed by a number of factors including droughts, legal requirements to maintain minimum flows in rivers and streams, water recharge rates, and a decree of the United States Supreme Court limiting withdrawal of water from Lake Michigan. In addition, the specter of regional climate change could pose the greatest threat to Illinois water supplies over the long term: some projections show the possibility of persistent floods, whereas other projections show persistent droughts. Additional sources of water do exist and can be tapped, but the cost of providing clean water increases with the necessity of water treatment, storage, and distribution, and the mitigation of impacts of new withdrawals on existing water supplies. Long lead times also are needed to construct major water projects. Unless the water supplies of Illinois are planned and managed in a comprehensive, regional, and visionary manner--based on the concept of renewable water supply capacity--water shortages could soon occur in some parts of the state. Water supply planning and management should be based on improved understanding and prediction of water supply and demand, and risk assessment. The goal of this plan is to provide a framework for Illinois State Water Survey (ISWS) water supply programs and to document those studies that ISWS, working with others, needs to conduct to provide Illinois with comprehensive technical data and information, models, and training for water supply planning and management. The following are the main tasks described in the plan: Collaborate with other organizations to coordinate and integrate relevant programs, set priorities, plan activities, conduct studies, and seek additional resources. Assemble, archive, digitize, analyze, and synthesize existing data. Determine areas of possible water shortages as a basis for setting priorities. Evaluate the quantity and quality of water resources throughout the state as they relate to water supply. Provide yield estimates for major aquifers and surface waters under variable and changing climatic conditions. Identify critical data gaps and conduct field studies to gather additional data and monitor the state's water resources. Evaluate opportunities for water conservation and reuse. Interpret and apply technical and economic data to assist and train water resource planners and managers. Develop and improve methods and models to evaluate water resources. Develop new quality-assured databases and an Internet-based decision support system to make data and models easily available for application by other agencies, professionals, and the general public. The rate and order of implementation of these studies will depend upon the level and sources of funds and priorities and upon collaborative efforts with other organizations. Existing resources are addressing many of these topics, but resources are limited so progress will be slow. A major infusion of new resources is needed for timely implementation of the studies described. | | | | Date Created: | 9 24 2004 | | | | Agency ID: | IEM-2001-03 | | | | ISL ID: | 000000000898 Original UID: 999999994331 FIRST WORD: Plan | |
| 303: | | Title: | | | | | Volume/Number: | 1973 | | | | Issuing Agency: | | | | | Description: | This circular presents basic information needed to plan and develop a domestic groundwater supply. A logical step-by-step planning summary is outlined. Accepted and recommended methods for a prospective owner of a domestic well to determine his water requirements and to gather meaningful information for planning his supply are presented. Also included are brief discussions on the occurrence, movement, availability, and quality of groundwater in Illinois, and the commonly used types of wells and pumps. | | | | Date Created: | 9 24 2004 | | | | Agency ID: | C-116 | | | | ISL ID: | 000000000739 Original UID: 999999993773 FIRST WORD: Planning | |
| 304: | | Title: | | | | | Volume/Number: | 2000 | | | | Issuing Agency: | | | | | Description: | The First Sino - U.S. Joint Workshop on Sediment was organized with strong support from both the United States and China, with the intention to strengthen information exchange and cooperation on research on emerging hydro-environmental problems. The Natural Science Foundation of China has established a national key research project, Study on Mechanisms of River Sedimentation, Disasters, and Control Strategies in China, and is interested in establishing a bilateral cooperation program with the United States on sediment transport and sediment-induced disasters. A joint workshop was considered to be an effective approach for scientists and engineers from both countries to exchange knowledge and experience, to explore research and educational needs, and to initiate future collaborations. In a three-day meeting in Beijing, China, followed by a five-day field study in the Loess Plateau along the middle reach of the Yellow River, the participants exchanged information on sediment-related topics and identified opportunities for future research and cooperation. A major emphasis of the workshop was to promote direct discussions, and the workshop sessions were structured accordingly. The format worked very well and resulted in ample exchange of experiences and needs for future studies. This report presents information from the workshop and summaries of discussions from the meeting in Beijing. | | | | Date Created: | 9 24 2004 | | | | Agency ID: | IEM-2000-01 | | | | ISL ID: | 000000000892 Original UID: 999999994075 FIRST WORD: Post | |
| 305: | | Title: | | | | | 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 | |
| 306: | | Title: | | | | | Volume/Number: | 2006 | | | | Issuing Agency: | | | | | Description: | Four aquifer systems and five watersheds in Illinois are identified as most in need of attention for water supply planning and management purposes. The aquifers and watersheds are identified on the basis of limited water supply availability and substantial population and economic growth. Improved water supply planning and management of these aquifers and watersheds will help ensure current and future water demands can be met and conflicts minimized. Aquifers and watersheds are listed in order of priority regarding the potential benefit and relative urgency of water supply planning. In addition to potential planning needs for these aquifers and watersheds at regional scales, there is a need to also evaluate the adequacy of individual community water supply systems scattered throughout southern and central Illinois that likely will be susceptible to water supply shortages during a major drought. The following aquifer systems are recommended as most in need of study and planning: the deep bedrock aquifer system of northeastern Illinois, the sand and gravel and shallow bedrock aquifers of northeastern Illinois, the Mahomet Aquifer of east-central Illinois, and the American Bottoms of southwestern Illinois (MetroEast area), and the following watersheds are recommended for study and planning: the Fox River watershed, the Kaskaskia River watershed, the Sangamon River watershed, the Kishwaukee River watershed, and the Kankakee River watershed. | | | | Date Created: | 8 1 2006 | | | | Agency ID: | IEM-2006-04 | | | | ISL ID: | 000000000944 Original UID: 999999994486 FIRST WORD: Prioritizing | |
| 307: | | Title: | | | | | 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 | |
| 308: | | Title: | | | | | Volume/Number: | 71 | | | | Issuing Agency: | | | | | Description: | This report presents the results and methodology of an intense study of rainfall frequency relationships throughout the Midwest (Illinois, Indiana, Iowa, Kentucky, Michigan, Minnesota, Missouri, Ohio, and Wisconsin). Using primarily 275 long-term daily reporting stations from the National Weather Service cooperative network supplemented by 134 daily reporting stations with shorter records, rainfall amounts have been determined for recurrence intervals from 2 months to 100 years and for durations of 5 minutes to 10 days. The results are presented as maps and as climate division averages in tabular form. Several special raingage networks were used to develop relationships between amounts for 24 hours and less. This report also examines the time distributions of heavy rainfall over time, and other storm characteristics such as storm orientation and movement. The assumption of spatially independent observations between stations also is discussed. | | | | Date Created: | 1992 | | | | Agency ID: | ISWS B-71 | | | | ISL ID: | 000000000719 Original UID: 774 FIRST WORD: Rainfall | |
| 309: | | Title: | | | | | Volume/Number: | 2002 | | | | Issuing Agency: | | | | | Description: | Fall application of nitrogen (N) fertilizer is a common practice in Illinois to help overcome the uncertainties of spring field work and to reduce the potential for delay in planting of spring crops. If, however, the N is applied while soil temperatures are above 50F, significant N losses can occur before the crop can take up the N. The lost N can pollute the state's water supplies, resulting in harm to the environment. The objective of this work was to provide agricultural community and public access to near real-time, 4-inch bare soil temperatures measured at 10:00 a.m. Central Standard Time (CST) each day. Hourly soil temperatures are measured at 18 automated weather stations in Illinois operated by the Illinois State Water Survey (ISWS). These stations make up the Illinois Climate Network (ICN). Measured weather variables include 4-inch sodded soil temperature, solar radiation, air temperature, relative humidity, barometric pressure, precipitation, and wind speed and direction. These data are collected, quality controlled, and placed on a Web site (http://www.sws.uiuc.edu/warm/soiltemp.asp) for public access. Daily maps of the 4-inch bare soil temperature are derived from a combination of actual 4-inch bare soil measurements at 8 ICN stations and computed bare soil temperature from 4-inch sodded soil temperature measurements from the remaining 10 sites. These maps allow users to see the general pattern of the 10:00 a.m. CST soil temperature from which they can estimate soil temperature at a given location. The other measured weather variables also are presented on the Web site in map format. Steven E. Hollinger and Robert W. Scott, Water and Atmosphere Resources Monitoring Program, Atmospheric Environment Section and Office of the Chief, Illinois State Water Survey, 2204 Griffith Drive, Champaign, Illinois 61820-7945 | | | | Date Created: | 9 24 2004 | | | | Agency ID: | CR-2002-06 | | | | ISL ID: | 000000000868 Original UID: 999999994344 FIRST WORD: Real | |
| 310: | | Title: | | | | | Volume/Number: | 2001 | | | | Issuing Agency: | | | | | Description: | As part of a study to estimate corn and soybean yields using satellite remote sensing techniques, biomass measurements, ground-level spectral measurements, and weather and energy flux measurements were taken at three locations in McLean County, Illinois. The locations were near Colfax, Lexington, and Stanford, Illinois. Plant samples and leaf area measurements were taken during the weeks of 12-17 June, 26-30 June, 10-14 July, 31 July-4 August, and 14-18 August 2000 in McLean County, Illinois. Corn plants were separated into leaf, stem, husk, and ear components, and soybean plants into leaf, stem, and pod components. The wet weights of the different plant parts were determined. To determine the plant dry biomass, the plant parts were dried in an oven until there was no weight change over two consecutive days. Leaf area for both corn and soybean canopies was measured using a LiCor-2000 instrument. Corn leaf area was also determined by manual measurements of leaf length and width. The smallest corn and soybean plants were at the Lexington location. The largest corn plants were at Colfax, and the largest soybean plants were at Stanford. The smaller plants at Lexington were a result of sandier soils containing less organic matter than the soils at either Stanford or Colfax. Although final yield was not measured as part of this sampling protocol, the size of the plants would indicate that Lexington should have the smallest corn and soybean yields, while the highest corn yields should have occurred at Colfax, and the highest soybean yields at Stanford. | | | | Date Created: | 9 24 2004 | | | | Agency ID: | CR-2001-13 | | | | ISL ID: | 000000000845 Original UID: 999999994328 FIRST WORD: Remote | |
| 311: | | Title: | | | | | 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 | |
| 312: | | Title: | | | | | Volume/Number: | 2001 | | | | Issuing Agency: | | | | | Description: | This is the third and final report on the Kankakee River in Illinois supported by the Conservation 2000 Program of the Illinois Department of Natural Resources. For this project, the Illinois State Water Survey mapped the bank erosion of the main stem of the Kankakee River from the Route 30 bridge in Indiana to the mouth of the Kankakee River with the Illinois River near Wilmington, collected about 100 bed and bank material samples, resurveyed all the previously surveyed river cross sections, surveyed four sand bars, and analyzed all historical and new data. This research has shown that of 223.6 river bank miles (includes both sides of the river), about 10.4 river bank miles have severe erosion, 39.4 river bank miles have moderate erosion, 70.8 river bank miles have minor erosion, and the remainder are either protected or stabilized or data are not available. The median diameter of the bed materials varied from 0.27 millimeters (mm) to 0.52 mm. The median diameter of bank materials varied from 0.07 mm to 0.41 mm. Analyses of the long-term flows from six gaging stations in Illinois showed an increasing trend in flows through the 1960s with no discernible increase since that time. Cross-sectional analyses of the river from the Kankakee Dam to the State Line Bridge did show some trends. The river reach from the Kankakee Dam to Aroma Park called Six-Mile Pool has lost 13.4 percent of its capacity due to sediment deposition since 1980. Similarly, Momence Wetland also has lost about 10.2 percent of its capacity since 1980. The section of the river between Aroma Park and Singleton Ditch showed both scour and sediment deposition. In general areas close to Aroma Park exhibited sediment deposition and the middle reach experienced scour. The recurring sand bar at the State Line Bridge area contains about 8,500 cubic yards of additional sediment in 1999 than were measured in 1980. The volumetric measurement of three additional sand bars showed some changes since 1980. The river is accumulating sediments within Six-Mile Pool and Momence Wetland. The middle reach is in semi-equilibrium with some sediment accumulation at several areas. Several management alternatives, both in-channel and watershed-based also are included to assist in the reduction of sedimentation problems of the Kankakee River. | | | | Date Created: | 9 24 2004 | | | | Agency ID: | CR-2001-09 | | | | ISL ID: | 000000000844 Original UID: 999999994327 FIRST WORD: River | |
| 313: | | Title: | | | | | Volume/Number: | 2001 | | | | Issuing Agency: | | | | | Description: | Brochure describes the Illinois State Water Survey (ISWS), which has been a leader in the study of water resources for more than a century. Founded in 1895, its original mission was to survey the waters of Illinois to trace the spread of waterborne disease, ensure health and safety of public water supplies, improve wastewater treatment, and help develop sanitary standards for drinking water. The mission and scope have expanded to include varied scientific research and service programs relating to water and atmospheric resources of interest to Illinois. | | | | Date Created: | 9 24 2004 | | | | Agency ID: | IEM-2001-02 | | | | ISL ID: | 000000000895 Original UID: 999999994319 FIRST WORD: Science | |
| 314: | | Title: | | | | | Volume/Number: | 2001 | | | | Issuing Agency: | | | | | Description: | This report documents the progress that has been made to date on the Conservation Reserve Enhancement Program (CREP) monitoring project. The Illinois Department of Natural Resources (IDNR) through the CREP provides support for this project. This monitoring program collects hydrologic, sediment, and nutrient data for selected watersheds within the Illinois River watershed to assist in the evaluation of the effectiveness of the program. The Illinois River CREP is a new initiative by the State of Illinois and the United States Department of Agriculture to implement conservation practices in the Illinois River watershed over a 15-year period that improve water quality and habitat for wildlife. Monitoring programs were established for sediment and nutrients for two pairs of watersheds within the Illinois River basin to collect hydrologic, sediment, and nutrient data during the implementation phase of the project. The two pairs of watersheds are the Court and Haw Creek watersheds (Spoon River basin) and the Panther-Cox Creek watershed (Sangamon River basin). This report details the location, equipment, and installation techniques used at the five monitoring stations and associated raingages that were installed as part of the data collection effort for this project. Samples of the data collection format and frequency are presented and described. Stage, nutrient concentration, and suspended sediment concentrations for data collected through June 2000 are also presented as appendices. | | | | Date Created: | 9 24 2004 | | | | Agency ID: | CR-2001-12 | | | | ISL ID: | 000000000846 Original UID: 999999994329 FIRST WORD: Sediment | |
| 315: | | Title: | | | | | Volume/Number: | 2003 | | | | Issuing Agency: | | | | | Description: | The Vermilion River and Little Vermilion River watersheds lie in seven counties in east-central Illinois and west-central Indiana. The drainage areas of the Vermilion River and Little Vermilion River at their confluences with the Wabash River are 1434 and 244 square miles, respectively. The Vermilion River meets the Wabash River at river mile 257.4 and has three tributaries: North Fork, Middle Fork, and Salt Fork. The Little Vermilion River is a direct tributary of the Wabash River at river mile 247.8. Lake Vermilion, a 660-acre impounded reservoir located on the North Fork Vermilion River, is the main municipal drinking water supply for the City of Danville, Illinois. The Little Vermilion River is the main tributary for the 63-acre Georgetown Reservoir, the municipal drinking water supply for the community of Georgetown, Illinois. Approximately 88 percent of the watersheds for both rivers are in agricultural production with approximately 5 percent in forest/woodlands and wetlands. The Illinois State Water Survey (ISWS) conducted a two-year watershed monitoring study of the Vermilion River and Little Vermilion River watersheds for the Vermilion River Ecosystem Partnership-Conservation 2000 Ecosystem Program. The purpose was to assist the partnership by establishing a baseline of hydrologic and water quality data to provide a better understanding of the cumulative impacts of future best management practices implemented in the watersheds. The ISWS established a streamgaging station on the Little Vermilion River near Sidell and monitored the hydrology, sediment, and nitrate-nitrogen (nitrate-N) there and at three U.S. Geological Survey (USGS) streamgaging sites in the Vermilion River watershed (Middle Fork Vermilion River above Oakwood, North Fork Vermilion River near Bismarck, and Vermilion River near Danville). Annual sediment loads for the three Vermilion River watershed stations were approximately three times higher than loads at the Little Vermilion station. The Middle Fork station had the highest sediment loads among the three Vermilion River stations for both project years. The North Fork station had the highest annual nitrate-N load for both monitoring years. In general, annual sediment and nitrate-N loads were lower during the first monitoring year, due to below average spring season runoff. Sampling for three pesticides (atrazine, alachlor, and metolachlor) was done on a weekly basis from June to October 2002. Atrazine was the only pesticide detected during this period. The highest level sampled was 20.93 micrograms per liter (and#956;g/L) and, and all others were below 2.65 and#956;g/L. | | | | Date Created: | 9 24 2004 | | | | Agency ID: | CR-2003-06 | | | | ISL ID: | 000000000873 Original UID: 999999994403 FIRST WORD: Sediment | |
| 316: | | Title: | | | | | Volume/Number: | 2002 | | | | Issuing Agency: | | | | | Description: | The Fox Chain of Lakes is a series of interconnected glacial lakes that are essentially located along the main stem of the Fox River. Originating in Wisconsin, the Fox River flows through northern Illinois before becoming a major tributary of the Illinois River. About 75 percent of the Fox River above the lowest section of the Fox Chain of Lakes lies in Wisconsin. The drainage area above the lowest point of the chain is about 1,184 square miles. The Fox Chain of Lakes has a surface area of more than 6,000 acres. Over the years, significant land-use changes have occurred on this watershed. These changes and the geographical location of the Fox River have resulted in extensive sediment deposition within these lakes. This is especially true for those lakes in the direct path of the Fox River. For example, Grass Lake and Nippersink Lake have lost most of their capacities to sediment deposition. The average depth of Grass Lake in 1975 was 2.7 feet, and the sediment is extremely soft. Within the present research activity, the original research conducted in 1974-1975 by the authors is being examined along with additional data collected by others within the last 25 years. These initial analyses indicated that both in-lake and off-lake sediment management techniques must be implemented to increase water depths within the lakes and decrease sediment loads. Among the in-lake management alternatives that should be considered are dredging and disposing of sediment outside the lake, discharging hydraulically dredged sediment into geotubes or some other type of containment facility within the lake, and creating artificial islands within the lake with dredged sediments. The watershed-based sediment management alternatives could include implementation of best management practices on the watershed, flow and sediment retention basins, side channel sediment traps, sediment management within the stream channel, and the implementation of a systemwide sediment management alternative. | | | | Date Created: | 9 24 2004 | | | | Agency ID: | CR-2002-04 | | | | ISL ID: | 000000000862 Original UID: 999999994342 FIRST WORD: Sediment | |
| 317: | | Title: | | | | | Volume/Number: | 2001 | | | | Issuing Agency: | | | | | Description: | Sedimentation detracts from the use of any water supply lake by reducing lake depth and volume, with a reduction of reserve water supply capacity and possible burying of intake structures. Sedimentation of a reservoir is a natural process that can be accelerated or slowed by human activities in the watershed. Silver Lake is Located in Madison County, one mile northwest of Highland, Illinois. The location of the dame is 38 degrees 46' 00" north latitude and 89 degrees 42' 05" west longitude in Section 30, T.4N., R.5W., Madison County, Illinois. The dam impounds the East Fork of Silver Creek, a tributary of Silver Creek in the Kaskaskia River basin. The watershed is a portion of Hydrologic Unit 07140204 as defined by the U.S. Geological Survey. Construction of the lake was completed in 1962. The Silver Lake watershed consists of the 47.1-square-mile area drained by the East Fork of Silver Creek above the dam site. Land use in the watershed of the lake is mainly agricultural. Average annual precipitation in the area is 38.98 inches as measured at Greenville (1961-1990), and the average runoff (1912-1998) is approximately 10.0 inches (Shoal Creek near Breese). Average annual lake evaporation rates are 35.2 inches per year at St. Louis, Missouri. The Illinois State Water Survey conducted sedimentation surveys of Silver Lake in 1981 and 1984. In 1981, cross sections were laid out at 14 lines across the lake and surveyed. Sedimentation surveys of Silver Lake in 1984 and 1999 repeated as closely as possible the series of survey lines established during the 1981 survey. Sedimentation has reduced the capacity of Silver Lake from 7,322 acre-feet or ac-ft (2,386 million gallons) in 1962 to 5,832 ac-ft (1,900 million gallons) in 1999. Sediment accumulation rates in the lake have averaged 40.3 ac-ft per year from 1962-1999. Annual sedimentation rates for three separate periods, 1962-1981, 1981-1984, and 1984-1999, were 51.2, 63.0, and 21.9 ac-ft, respectively. Density analyses of the sediment samples indicate that sediment in the northern (upstream) portions of the lake has greater unit weight than sediment in the southern end of the lake. In general, coarser sediments are expected to be deposited in the upstream portion of a lake where the entrainment velocity of the stream is reduced to the much slower velocities of a lake environment. These coarser sediments tend to be denser when settled and are subject to shallow drying and higher compaction rates as a result of more frequent drawdown exposure in the shallow water environment. As the remaining sediment load of the stream is transported through the lake, increasingly finer particle sizes and decreasing unit weight are observed. The sedimentation rate for Highland Silver Lake is similar to the rates for other Illinois lakes of similar size and character. The sedimentation for Silver Lake is in the low to average ranged compared to other Illinois lakes. | | | | Date Created: | 9 24 2004 | | | | Agency ID: | CR-2001-05 | | | | ISL ID: | 000000000835 Original UID: 999999994316 FIRST WORD: Sedimentation | |
| 318: | | Title: | | | | | Volume/Number: | 2001 | | | | Issuing Agency: | | | | | Description: | Sedimentation detracts from the use of any water supply lake by reducing lake depth and volume, with a reduction of reserve water supply capacity and possible burying of intake structures. Sedimentation of a reservoir is a natural process that can be accelerated or slowed by human activities in the watershed. Lake Decatur is located in Macon County, northeast of Decatur, Illinois. The location of the dam is 39 49 28" north latitude and 88 57 30" west longitude in Section 22, T.16N., R.2W., Macon County, Illinois. The dam impounds the Sangamon River in the Sangamon River basin. The watershed is a portion of Hydrologic Unit 07130006 as defined by the U.S. Geological Survey. The lake was constructed in 1922 with a spillway level of 610 feet above mean sea level (feet-msl). In 1956, a set of hydraulic gates was installed on the original spillway to allow variable lake levels from 610 feet-msl to 615 feet-msl. The portion of the lake surveyed for the present study was Basin 6 located above Rea's Bridge Road. This basin of the lake is the headwater area of the main body of the lake. Lake Decatur has been surveyed to document sedimentation conditions eight times since 1930. Five of these survey efforts (1936, 1946, 1956, 1966, and 1983) were sufficiently detailed to be termed full lake sedimentation surveys. The present survey is not considered to be a full lake sedimentation survey. Sedimentation has reduced the basin capacity from 2,797 acre-feet (ac-ft) in 1922 to 1,451 ac-ft in 2000. The 2000 basin capacity was 48.1 percent of the 1922 potential basin capacity. For water supply purposes, these volumes convert to capacities of 911 million gallons in 1922 and 473 million gallons in 2000. Sedimentation rate analyses indicate a decline in annual sediment deposition rates from 35.4 ac-ft for the period 1922-1936 to 8.3 ac-ft annually from 1983-2000. The long-term average annual deposition rate for 1922-2000 was 17.3 ac-ft. Density analyses of the sediment samples indicate that the unit weight of sediment in the northern (upstream) portions of the lake is greater than the unit weight of sediment in the southern end of the lake. In general, coarser sediments are expected to be deposited in the upstream portion of a lake where the entrainment velocity of the stream is reduced to the much slower velocities of a lake environment. These coarser sediments tend to be denser when settled and are subject to drying and higher compaction rates as a result of more frequent drawdown exposure in the shallow water environment. As the remaining sediment load of the stream is transported through the lake, increasingly finer particle sizes and decreasing unit weight are observed. | | | | Date Created: | 9 24 2004 | | | | Agency ID: | CR-2001-07 | | | | ISL ID: | 000000000838 Original UID: 999999994321 FIRST WORD: Sedimentation | |
| 319: | | Title: | | | | | Volume/Number: | 2002 | | | | Issuing Agency: | | | | | Description: | Sedimentation detracts from the use of any water-supply lake by reducing lake depth and volume, with a reduction of reserve water-supply capacity and possible burying of intake structures. Sedimentation of a reservoir is a natural process that can be accelerated or slowed by human activities in the watershed. Lake Decatur is located in Macon County, northeast of Decatur, Illinois. The location of the dam is 39 49' 28' north latitude and 88 57' 30' west longitude in Section 22, T.16N., R.2W., Macon County, Illinois. The dam impounds the Sangamon River in the Sangamon River basin. The watershed is a portion of Hydrologic Unit 07130006 as defined by the U.S. Geological Survey. The lake was constructed in 1922 with a spillway level of 610 feet above mean sea level (feet-msl). In 1956, a set of hydraulic gates was installed on the original spillway to allow variable lake levels from 610 feet-msl to 615 feet-msl. The portions of the lake surveyed for the present study were the Big and Sand Creek basins. These basins are the two major tributary stream basins formed to the south (Sand Creek) and east (Big Creek) of the main body of the lake. They receive the flow of Sand, Big, and Long Creeks. Lake Decatur has been surveyed to document sedimentation conditions nine times since 1930. Five of these survey efforts (1936, 1946, 1956, 1966, and 1983) were sufficiently detailed to be termed full lake sedimentation surveys. The survey discussed in detail in this report is not a full lake sedimentation survey. However, additional work included in the present study could be combined with the 2000 survey of Basin 6 of Lake Decatur to provide a complete baseline survey for future reference. Sedimentation has reduced Big Creek basin capacity from 2,754 acre-feet (ac-ft) in 1922 to 1,512 ac-ft in 2001. The 2001 basin capacity was 54.9 percent of the 1922 potential basin capacity. For water-supply purposes, these volumes convert to capacities of 897 million gallons in 1922 and 493 million gallons in 2001. Sedimentation rate analyses indicate a decline in annual sediment deposition rates from 28 ac-ft (1922-1946) to 9.9 ac-ft annually (1983-2001). The long-term average annual deposition rate was 15.7 ac-ft (1922-2001). Sedimentation has reduced the Sand Creek basin capacity from 610 acre-feet (ac-ft) in 1922 to 246 ac-ft in 2001. The 2001 basin capacity was 40.3 percent of the 1922 potential basin capacity. For water-supply purposes, these volumes convert to capacities of 199 million gallons in 1922 and 80 million gallons in 2001. Sedimentation rate analyses indicate a decline in annual sediment deposition rates from 8.4 ac-ft (1922-1946) to 2.3 ac-ft annually (1983-2001). The long-term average annual deposition rate was 4.6 ac-ft (1922-2001). | | | | Date Created: | 9 24 2004 | | | | Agency ID: | CR-2002-09 | | | | ISL ID: | 000000000870 Original UID: 999999994347 FIRST WORD: Sedimentation | |
| 320: | | Title: | | | | | Volume/Number: | 2003 | | | | Issuing Agency: | | | | | Description: | The Illinois State Water Survey (ISWS) conducted sedimentation surveys of Lake Paradise and Lake Mattoon during 2001 in support of an Illinois Clean Lakes Program diagnostic/feasibility study to provide information on the storage and sedimentation conditions of the lakes. Both lakes are owned and operated by the City of Mattoon, which withdraws water from Lake Paradise as the raw water source for distribution of finished water and generally uses withdrawals from Lake Mattoon to maintain a more stable water level in Lake Paradise. The village of Neoga also withdraws water from Lake Mattoon for treatment and distribution. Since June 2001, Reliant Energy has operated a peaker power plant that has withdrawn water from Lake Mattoon for cooling systems. Lake Paradise and Lake Mattoon are located on the main stem of the Little Wabash River, a tributary to the Wabash River. The watershed is a portion of Hydrologic Unit 05120114. The dam for Lake Paradise is about 4 miles southwest of the City of Mattoon at 39 24' 47" north latitude and 88 26' 23" west longitude in Section 8, Township 11N., Range 7E., Coles County. The dam for Lake Mattoon is about 12 miles southwest of the City of Mattoon at 39 20' 00" north latitude and 88 28' 56" west longitude in Section 1, Township 10N., Range 6E., Shelby County.Lake Paradise was surveyed in 1979 and Lake Mattoon in 1980 as part of a previous cooperative study by the ISWS, the Illinois Department of Transportation - Division of Water Resources (DoWR), the Illinois Water Resources Center, and several departments at the University of Illinois at Urbana-Champaign. Lake Paradise lost 835 acre-feet (ac-ft) of its capacity as a result of sedimentation between 1908 and 2001. Approximately 481 ac-ft of this loss has occurred since 1931, which gives an annual sedimentation rate of 9.9 ac-ft since 1931. If this rate of sedimentation continues, the volume of Paradise Lake will be approximately half of the potential 1908 volume in the year 2013 and will be filled completely by sediment in the year 2118. Lake Mattoon lost 1,705 ac-ft of its 1958 capacity as a result of sedimentation between 1958 and 2001, a sedimentation rate of 39.7 ac-ft per year since 1958.If this rate of sedimentation continues, the volume of Lake Mattoon will be approximately half of the 1958 capacity by 2124 and will be completely filled in the year 2291. The sedimentation rates for Lake Paradise and its watershed for the periods 1931-1979, 1979-2001, and 1931-2001 were stable and ranged from 9.5 to 10 ac-ft.The long-term average annual sediment yield from 1931-2001 was 9.85 ac-ft. These sedimentation rates correspond to a rate of loss of lake capacity of 0.51 percent per year (1931-2001). The sedimentation rates for Lake Mattoon and its watershed for the periods 1958-1980, 1980-2001, and 1958-2001 indicate a reduction in net sediment yield from 66.9 ac-ft per year for 1958-1980 to 10.7 ac-ft per year (1980-2001).The long-term average annual sediment yield was 39.5 ac-ft (1958-2001). These sedimentation rates correspond to rates of loss of lake capacity of 0.51 percent per year (1958-1980) and 0.08 percent per year (1980-2001).The long-term average sedimentation rate for the lake is 0.30 percent per year (1958-2001). | | | | Date Created: | 9 24 2004 | | | | Agency ID: | CR-2003-04 | | | | ISL ID: | 000000000881 Original UID: 999999994353 FIRST WORD: Sedimentation | |
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