Organization | • | Illinois State Water Survey | [X] |
| | 281: | | Title: | | | | | Volume/Number: | 2005 | | | | Issuing Agency: | | | | | Description: | Prompted by concerns for their county's water resources, Kane County officials funded a multifaceted project to be conducted by the Illinois State Water Survey (ISWS) and Illinois State Geological Survey (ISGS). The project, initiated in May 2002 and scheduled to conclude in May 2007, will provide baseline water-resources data, analyses, and tools for future analyses of water resources available to the county. This report presents and discusses groundwater data and analyses performed as a part of the ongoing investigations in Kane County. Shallow aquifers considered include the unconsolidated sand-and-gravel aquifers and the uppermost bedrock (i.e., the shallow bedrock aquifer). Deeper bedrock aquifers, including the productive Ancell Group and Ironton-Galesville sandstones, are not within the scope of this study, but are discussed in other ISWS reports. The study area includes Kane County and adjacent townships covering a total area of 1260 square miles. A network of 1010 private, public, industrial, and commercial wells was assembled during the inventory phase (May 2002 -August 2003). During the synoptic phase (September -October 2003), water-level measurements were collected from those wells. Waterlevel data were used to construct potentiometric maps for four shallow aquifers: the unnamed tongue below the Batestown Member, the Ashmore Tongue, the aggregated Glasford Formation sands, and the shallow bedrock. Using only groundwater data to constrain the potentiometric surfaces of individual aquifers, the potentiometric surfaces still closely correlated with perennial stream configurations and land-surface topography. The Fox River and Marengo Ridge are the most influential features that determine regional groundwater flow patterns in the county. Groundwater flow west of the Fox River is predominantly to the south and east. East of the Fox River, flow is to the south and west. The interim potentiometric maps can be used to characterize regional groundwater flow, identify areas of groundwater recharge and discharge, determine regional effects of groundwater withdrawals, and provide a baseline for comparison with future groundwater conditions. The maps will be useful in developing a conceptual model of groundwater flow and mathematical groundwater flow models for a wide range of analyses, including aquifer development scenarios. In 2003, 46 high-capacity wells accounted for 6.3 billion gallons or 97 percent of the total reported groundwater withdrawals of 6.5 billion gallons from the shallow aquifers in Kane County. If unreported withdrawals also are estimated, total withdrawals in 2003 may have been as much as 6.9 billion gallons. Groundwater withdrawals appear to have locally influenced the head surfaces, particularly in east-central and southeastern Kane County. Areas of relatively low head in the shallow bedrock aquifer may reflect large withdrawals from the aquifer, hydraulically connected units, and/or areas of significant discharge to the Fox River. A preliminary analysis of aquifer connections was based on potentiometric surfaces. Areas of potential aquifer connection were identified solely on similarity of measured heads. However, to refine this analysis, aquifer connections need to be evaluated further, taking into account aquifer concurrence and predicted thicknesses of intervening clay-rich geologic deposits. Nomenclature previously used to describe the aquifers of Kane County needs to be reevaluated to address vertical and horizontal aquifer continuity. That reevaluation will require additional geological modeling to more fully characterize and differentiate hydrostratigraphic units of importance such as sands in the Tiskilwa and Glasford Formations. Interim potentiometric maps presented in this report are subject to change as the conceptual hydrostratigraphy evolves. If the interim maps require changes, final versions will be released in the final report on groundwater investigations in 2007. | | | | Date Created: | 5 12 2005 | | | | Agency ID: | CR-2005-04 | | | | ISL ID: | 000000000883 Original UID: 999999994453 FIRST WORD: Kane | |
| 282: | | Title: | | | | | Volume/Number: | 1960 | | | | Issuing Agency: | | | | | Description: | Most if not all of the so called artesian aquifers in Illinois are actually leaky artesian aquifers. If the permeability of the confining bed is very low, vertical leakage may be difficult to measure within the average period (8 to 24 hours) of pumping tests. However, since the cone of depression created by pumping a well tapping a leaky artesian aquifer continues to expand until discharge is balanced by the amount of induced leakage, it does not follow that vertical leakage is of small importance over extended periods of time. As the cone of depression grows in extent and depth, the area of leakage and the vertical hydraulic gradient become large. Accordingly then, with long periods of pumping, contribution by leakage through a confining bed may be appreciable even though the vertical permeability is very low. If a source is available to replenish continuously the confining bed, the cone of depression developed by a well pumping for long extended periods will be influenced by the vertical permeability of the confining bed in addition to the hydraulic properties and geohydrologic boundaries of the main aquifer. Any long-range forecast of well or aquifer yield must include the important effects of leakage through the confining bed. The vertical permeability of a confining bed often can be determined from the results of pumping tests as described in this publication. | | | | Date Created: | 9 24 2004 | | | | Agency ID: | RI-39 | | | | ISL ID: | 000000000918 Original UID: 999999993903 FIRST WORD: Leaky | |
| 283: | | Title: | | | | | Volume/Number: | 1999 | | | | Issuing Agency: | | | | | Description: | An analysis of long-term records of corn yields, water resource conditions, and seasonal weather conditions in Illinois found major temporal shifts and important spatial variations in the types of seasonal weather conditions that have positive and negative impacts on yields and water conditions. Nineteen different types of corn-weather seasons (May-August) occurred during 1901-1997, of which nine types accounted for most of the high corn yields (highest 20 of the 97 values) and eight types produced most low yields (lowest 20 values). An assessment of the years with either high or low yields revealed three findings about the distributions of the corn-weather seasons creating these extremes: 1) some types were uniformly distributed throughout the century; 2) others were unevenly distributed over time, some occurring only in the century's early decades and others only in the last few decades; and 3) certain types varied greatly regionally. Yield responses to certain seasonal types varied over time. The findings helped establish that changes in farming practices, corn varieties, and agricultural technology all affect how a given type of growing season affects corn yields. Sizable regional differences in yield outcomes from a given set of weather conditions, a result of varying soil and climate differences across Illinois, further revealed how impacts of similar seasonal weather conditions can vary spatially. These two conclusions revealed the importance of using weather effects in defining seasonal extremes. In general, the statewide results showed that the types of seasons creating high yields predominated during 1901-1910 and 1961-1997, and most seasons creating low yields were concentrated in 1911-1920, 1931-1940, and 1951-1960. Major seasonal weather effects on Illinois' water resources (surface water supplies, ground-water supplies, and water quality) were found to occur in the spring and summer seasons. Two conditions caused these effects in each season: either above normal temperatures and below normal precipitation, or above normal temperatures and precipitation. Spring impacts on water resources were typically mixed, some negative and some positive, whereas impacts from summer season extremes had largely negative impacts on water supplies and water quality. More impacts, positive and negative, occurred in southern Illinois than elsewhere, and most of the seasons having negative impacts on water resources occurred in Illinois during 1911-1960. Comparison of the 1901-1997 temporal distributions of yield extremes (high and low) and the negative summer water resource impacts with the temporal distributions of cyclone passages and the incidence of El Nio Southern Oscillation conditions that affect spring and summer weather conditions revealed a generally good relationship. Periods with many seasons creating numerous negative impacts on corn yields and water resources occurred in several decades (1911-1920, 1931-1940, and 1951-1960) when the number of cyclones was low and most incidences of La Nia conditions that create warm temperatures and negative impacts prevailed. Conversely, when seasonal weather conditions were generally beneficial (1901-1910, 1961-1970, and 1981-1997), Illinois had relatively large numbers of cyclone passages and most El Nio-related cool and wet summers occurred. Consideration needs to be given to the shifting temporal responses to various kinds of seasonal weather conditions during the 20th century to determine how future climatic conditions may affect Illinois' agriculture and water resources. Furthermore, some influential seasonal weather types appeared sporadically, some only during the early decades of the century and others only in the latter decades. Thus, data from the past 97 years reveal that efforts to project impacts of future climate conditions on agriculture and water resources may be difficult and subject to considerable error. | | | | Date Created: | 9 24 2004 | | | | Agency ID: | RR-127 | | | | ISL ID: | 000000000948 Original UID: 999999994058 FIRST WORD: Long | |
| 284: | | Title: | | | | | Volume/Number: | | | | | Issuing Agency: | | | | | Description: | This web page provides general information on the Mahomet aquifer, groundwater quality, and the human demands on it. | | | | Date Created: | 01 12 2007 | | | | Agency ID: | | | | | ISL ID: | 000000003002 Original UID: 2869 FIRST WORD: Mahomet | |
| 285: | | Title: | | | | | Volume/Number: | 2001 | | | | Issuing Agency: | | | | | Description: | One of the main concerns was the ability to specify proper stage hydrographs at the downstream boundary of the Lower Illinois River for hydraulic design and analysis. We found that a unique stage-discharge rating relationship does not exist at the lower boundary of the Lower Illinois River at Grafton because of backwater effects from the Upper Mississippi River. Management options and results for managed storage and emergency activities need to be analyzed under more comprehensive design of flooding conditions. To improve the capability of UNET for modeling backwater effects for the Lower Illinois River, an extended model including Pool 26 of the Upper Mississippi River was developed. The downstream stations of the model are at the tail of Lock and Dam 25 and the Mel Price Lock and Dam pool, where stage readings are available. The model was calibrated with a 1979 flood and verified with a 1983 flood. Discharge and stage frequency analysis have also been performed for stations at Troy on Cuivre River, Lock and Dam 25 tail, Lock and Dam 26 pool, and Mel Price Lock and Dam on the Mississippi River. | | | | Date Created: | 9 24 2004 | | | | Agency ID: | CR-2001-10 | | | | ISL ID: | 000000000840 Original UID: 999999994323 FIRST WORD: Management | |
| 286: | | Title: | | | | | Volume/Number: | 2001 | | | | Issuing Agency: | | | | | Description: | This report documents the structure and the use of a windows-based interface developed by the Illinois State Water Survey for the Office of Water Resources, Illinois Department of Natural Resources. The current version of the interface program is able to download historic, real-time, and forecasted stage and flow data from the U.S. Geological Survey, U.S. Army Corps of Engineers, and the National Weather Service websites interactively. These data are used to update existing Data Storage System (DSS) database or to create new ones; to run the UNET model for historic, design, real-time, and forecasted flood events in the Lower Illinois River; and to post-process model outputs from DSS files in tabular and graphical formats.. This interface program uses the original UNET generic geometry and boundary condition files to maintain the same level of accuracy as the UNET model, but it also allows the user to change some of the parameters, such as, the simulation time interval, time windows, and numerical Corant number, and etc., in the BC file. The real-time simulation of a flood event simulates the flood stage profiles using forecasted stage and real-time flow data downloaded from related websites. With the primary focus on simulations of levee failures, the interface program lets the users modify parameters to simulate simple levee failures through the simple spillway approach for two types of complicated embankment failures, overtopping and piping. A new simulation can be performed using the modified levee information. The change of water surface elevation induced by modifying the levees can be compared with another simulation graphically and also in table format. Stage profiles from all the simulations can be plotted together with the levee heights on both sides of the channel along the Lower Illinois River to provide a visual view of the locations of overtopping. Overtopping locations and magnitudes will be tabulated should they occur. | | | | Date Created: | 9 24 2004 | | | | Agency ID: | CR-2001-16 | | | | ISL ID: | 000000000857 Original UID: 999999994333 FIRST WORD: Management | |
| 287: | | Title: | | | | | Volume/Number: | 2001 | | | | Issuing Agency: | | | | | Description: | Brochure describing the research and services available from the Midwestern Regional Climate Center (MRCC) help to better explain climate and its impacts on the Midwest, provide practical solutions to specific climate problems, and allow us to develop issues-based climate information for the Midwest. Our data and information focus primarily on applications to climate-sensitive sectors and scientific research. In addition to providing on-line access to the interactive, subscription-based Midwestern Climate Information System (MICIS), the MRCC web site provides climate statistics for the Midwest and links to climate resources around the country. | | | | Date Created: | 9 24 2004 | | | | Agency ID: | IEM-2001-01 | | | | ISL ID: | 000000000894 Original UID: 999999994318 FIRST WORD: Midwestern | |
| 288: | | Title: | | | | | Volume/Number: | | | | | Issuing Agency: | | | | | Description: | The objective of the Illinois State Water Survey work was to develop a simple model to evaluate the suitability of many crops for Illinois conditions, but also with application for other geographic regions. | | | | Date Created: | 01 21 2004 | | | | Agency ID: | | | | | ISL ID: | 000000001912 Original UID: 1780 FIRST WORD: Model | |
| 289: | | Title: | | | | | Volume/Number: | 2005 | | | | Issuing Agency: | | | | | Description: | This publication provides an Introduction to the Mercury Deposition Network (MDN), which is the mercury wet-deposition monitoring arm of the National Atmospheric Deposition Program (NADP). The NADP is a cooperative monitoring program comprised of federal and state agencies, academic institutions, Native American tribal governments, and private organizations. The work of MDN is descibed, as is the danger of mercury to humans. Readers are encouraged to join MDN. | | | | Date Created: | 12 22 2005 | | | | Agency ID: | IEM-2005-03 | | | | ISL ID: | 000000000954 Original UID: 999999994475 FIRST WORD: Monitoring | |
| 290: | | Title: | | | | | Volume/Number: | 1908 | | | | Issuing Agency: | | | | | Description: | For more than ten years the State Water Survey has been making analyses of the various waters used by the people of the State. The work has been carried on in accordance with an Act of the Fortieth General Assembly entitled An Act to establish a chemical survey of the waters of the State of Illinois." This report contains data concerning the source of the water supplies and the quality of the water of cities which according to the census of 1900 had more than 1,000 inhabitants. The data concerning the supplies was obtained by correspondence with water works officials or city officers. Three series of letters were sent out and a direct-report, more or less complete, has been received from all but fourteen of the cities having more than 1,000 inhabitants. In a few instances data have been taken from previous works which treat of the municipal water supplies of Illinois. In nearly every case we have confirmed the data thus taken. There are also included analytical data which have been obtained by the survey since its foundation in 1897 to the end of 1906. | | | | Date Created: | 9 24 2004 | | | | Agency ID: | B-5 | | | | ISL ID: | 000000000724 Original UID: 999999992005 FIRST WORD: Municipal | |
| 291: | | Title: | | | | | Volume/Number: | | | | | Issuing Agency: | | | | | Description: | This web page provides general information on the Cambrian-Ordovician aquifer in northeastern Illinois, groundwater quality, diversion of water from Lake Michigan, and the human impact on the aquifer. | | | | Date Created: | 09 21 2006 | | | | Agency ID: | | | | | ISL ID: | 000000003003 Original UID: 2870 FIRST WORD: Northeastern | |
| 292: | | Title: | | | | | Volume/Number: | 2000 | | | | Issuing Agency: | | | | | Description: | The Illinois State Water Survey (ISWS), under contract to the Imperial Valley Water Authority (IVWA), has operated a network of rain gauges in Mason and Tazewell Counties since August 1992. The ISWS also established a network of ground-water observation wells in the Mason-Tazewell area in 1994. These networks are located in the most heavily irrigated region of the state. The region's major source of water for irrigation, municipal, and domestic water supplies is ground water pumped from thick sand and gravel deposits associated with the confluence of two major ancient river valleys, the Mississippi and the Mahomet-Teays. Relatively recent extreme weather events (e.g., the drought of 1988 and the great flood of 1993) resulted in large fluctuations in ground-water levels in the Imperial Valley area. The purpose of the rain gauge network and the ground-water observation well network is to collect long-term data to determine the rate of ground-water drawdown in dry periods and during the growing season, and the rate at which the aquifer recharges. This report presents data accumulated from the rain gauge and observation well networks since their inception through August and November 1999, respectively. Precipitation is recorded for each storm that traverses the Imperial Valley, and ground-water levels at the 13 observation wells are measured the first of each month. The database from these networks consists of seven years of precipitation data and five years of ground-water observations. At the beginning of the ground-water observations in late 1994, the water levels were at their highest in the five years of observation. These high ground-water levels were the result of the very wet 1992-1995 period when annual precipitation was above the 30-year normals at both Havana and Mason City. From September 1995-August 1997 precipitation in the region was below the 30-year normal. The 1997-1998 observation year had rainfall above the 30-year normal. Ground-water levels in the observation wells mirrored these rainfall patterns, showing a general downward trend during the dry years and a recovery in the wet 1997-1998 year. Seasonal increases in the ground-water levels were observed at most wells during the late spring and early summer, followed by decreases in August-November ground-water levels. Analysis indicates that the ground-water levels are affected by both the precipitation in the Imperial Valley area and the Illinois River stages. The observation wells closest to the Illinois River show an increase in water levels whenever the river stage is high. Generally, the water levels in the wells correlate best with precipitation and Illinois River stages one to two months before the water levels are measured, i.e., the June ground-water levels are most highly correlated with the Illinois River stage or precipitation that occurs in either April or May. The analyses conducted indicate the need for continued operation of both networks due to inconsistencies associated with ground-water levels, precipitation, and the Illinois River stage. For instance, the Mason-Tazwell observation well number 2 (MTOW-2) is located near the center of Mason County well away from the Illinois River, but it has an equal correlation with the Illinois River stage and the precipitation in the area. Additional analysis needs to be undertaken to explain this unusual finding. | | | | Date Created: | 9 24 2004 | | | | Agency ID: | CR-2000-12 | | | | ISL ID: | 000000000830 Original UID: 999999994307 FIRST WORD: Operation | |
| 293: | | Title: | | | | | Volume/Number: | 2001 | | | | Issuing Agency: | | | | | Description: | The Illinois State Water Survey (ISWS), under contract to the Imperial Valley Water Authority (IVWA), has operated a network of rain gauges in Mason and Tazewell Counties since August 1992. The ISWS also established a network of groundwater observation wells in the Mason-Tazewell area in 1994. These networks are located in the most heavily irrigated region of the state. The region's major source of water for irrigation, municipal, and domestic water supplies is groundwater pumped from thick sand-and-gravel deposits associated with the confluence of two major ancient river valleys, the Mississippi and the Mahomet-Teays. Relatively recent extreme weather events (e.g., the drought of 1988 and the great flood of 1993) resulted in large fluctuations in groundwater levels in the Imperial Valley area. The purpose of the rain gauge network and the groundwater observation well network is to collect long-term data to determine the rate of groundwater drawdown in dry periods and during the growing season, and the rate at which the aquifer recharges. This report presents data accumulated from the rain gauge and observation well networks since their inception through August 2000. Precipitation is recorded continuously at 20 rain gauges for each storm that traverses the Imperial Valley. Groundwater levels at the 13 observation wells are measured the first of each month. The database from these networks consists of eight years of precipitation data and six years of groundwater observations. At the beginning of groundwater observations in late 1994, the water levels were at their highest in the six years of observation. These high groundwater levels were the result of the very wet 1992-1995 period when annual precipitation was above the 30-year normals at both Havana and Mason City. From September 1995-August 1997, precipitation in the region was well below the 30-year normal followed by the 1997-1998 and 1998-1999 observation years with rainfall totals that were slightly above and slightly below normal, respectively. Groundwater levels in the observation wells reflected the multi-year rainfall patterns, showing a general downward trend during the dry years, a recovery in the wet 1997-1998 year, and a leveling off in 1998-1999. Precipitation in the region during observation year 1999-2000 was well below normal, mirroring the quite low totals observed during the dry years of 1995-1997. In response, groundwater levels fell to levels similar to those experienced in 1996-1997. Analysis indicates that groundwater levels are affected by both the precipitation in the Imperial Valley area and, for wells close to the Illinois River, by river stage. Generally, water levels in wells follow antecedent precipitation and Illinois River stage by one to two months, i.e., June groundwater levels are most highly correlated with the Illinois River stage or precipitation that occurs in April or May. The analyses conducted indicate the need for continued operation of both networks due to inconsistencies associated with groundwater levels, precipitation, and the Illinois River stage. For instance, although observation well number 2 (MTOW-2) is located near the center of Mason County, well away from the Illinois River, it has an equal correlation with the Illinois River stage and area precipitation. Additional data collection and analyses are needed to determine the reasons for this and other data disparities. | | | | Date Created: | 9 24 2004 | | | | Agency ID: | CR-2001-15 | | | | ISL ID: | 000000000856 Original UID: 999999994332 FIRST WORD: Operation | |
| 294: | | Title: | | | | | Volume/Number: | 2002 | | | | Issuing Agency: | | | | | Description: | The Illinois State Water Survey (ISWS), under contract to the Imperial Valley Water Authority (IVWA), has operated a network of rain gauges in Mason and Tazewell Counties since August 1992. The ISWS also established a network of groundwater observation wells in the Mason-Tazewell area in 1994. These networks are located in the most heavily irrigated region of the state. The region's major source of water for irrigation and municipal, industrial, and domestic water supplies is groundwater pumped from thick sand-and-gravel deposits associated with the confluence of two major ancient river valleys, the Mississippi and the Mahomet-Teays. Recent extreme weather events (e.g., the drought of 1988 and the great flood of 1993) resulted in large fluctuations in groundwater levels in the Imperial Valley area. The rain gauge network and the groundwater observation well network collect long-term data to determine the rate of groundwater level decline in dry periods and during the growing season, and the rate of groundwater level recovery during recharge periods. This report presents data accumulated from the rain gauge and observation well networks since their inception through August 2001. Precipitation is recorded continuously at 20 rain gauges for each storm that traverses the Imperial Valley. Groundwater levels at the 13 observation wells are measured the first of each month. The database from these networks consists of nine years of precipitation data and seven years of groundwater observations. At the beginning of groundwater observations in late 1994, the water levels were at their highest in the seven years of observation. These high groundwater levels were the result of the very wet 1992-1995 period when annual precipitation was above the 30-year normals at both Havana and Mason City. From September 1995-August 1997, precipitation in the region was well below the 30-year normal followed by the 1997-1998 and 1998-1999 observation years with rainfall totals slightly above and slightly below normal, respectively. Groundwater levels in the observation wells reflected the multi-year rainfall patterns, showing a general downward trend during dry years, a recovery in wet 1997-1998, and a leveling off in near-normal 1998-1999, followed by declines in dry 1999-2000. Despite a dry July, near-normal precipitation in 2001 brought a return to more typical seasonal hydrographs. This report includes new regression analyses of data collected through August 2001, similar to regression analyses first conducted on data collected through August 1998. The analyses indicate that groundwater levels are affected by precipitation in the Imperial Valley area and, for wells close to the Illinois River, by river stage. Generally, water levels in wells follow antecedent precipitation and Illinois River stage by one to two months; e.g., a high correlation between June groundwater levels and the Illinois River stage or precipitation that occurs in April or May. However, additional data collected since 1998 did not improve the results of the regression analyses. In fact, coefficients of determination for many regressions worsened. This suggests that regressions of observed groundwater levels versus river stage and precipitation are not adequately describing all the variables affecting groundwater levels. Using the data collected to verify, test, and improve the existing Imperial Valley groundwater flow model is highly recommended. Continued data collection also is recommended to create long-term data sets of precipitation and groundwater levels for use in modeling analyses. Collection of additional groundwater level and irrigation pumpage data also is highly recommended. | | | | Date Created: | 9 24 2004 | | | | Agency ID: | CR-2002-07 | | | | ISL ID: | 000000000869 Original UID: 999999994345 FIRST WORD: Operation | |
| 295: | | Title: | | | | | Volume/Number: | 2005 | | | | Issuing Agency: | | | | | Description: | The Illinois State Water Survey (ISWS), under contract to the Imperial Valley Water Authority (IVWA), has operated a network of rain gauges in Mason and Tazewell Counties since August 1992. The ISWS also established a network of groundwater observation wells in the Mason-Tazewell area in 1994 that is monitored by the IVWA. The purpose of the rain gauge network and the groundwater observation well network is to collect long-term data to determine the impact of groundwater withdrawals in dry periods and during the growing season, and the rate at which the aquifer recharges. This report presents data accumulated from both networks since their inception through August 2003. Precipitation is recorded continuously at 20 rain gauges. Groundwater levels are measured the first of each month at 13 observation wells. The database from these networks consists of 11 years of precipitation data and nine years of groundwater observations. For the period September 2002-August 2003, the network received an average of 30.06 inches of precipitation, 5.84 inches lower than the network 10-year 1992-2002 average precipitation. Precipitation was below average in the fall, winter, and spring, but above average during the summer of 2003. In 2002-2003, groundwater levels in many wells tended to follow the now-familiar pattern of rising water levels in early spring and peaks in mid-summer before evapotranspiration demands cause water levels to decline. However, the extremely low precipitation that occurred from the period September 2002 through May 2003 (9.23 inches below the 11-year normal) caused a weak recovery before the irrigation season started. Several wells (MTOW-4, -10, -11, and -13) experienced essentially no water-level recovery during this reporting period. Water levels in MTOW-13, in particular, fell throughout the year. That well is located in northeastern Mason County, the area of lowest precipitation. Total irrigation for the June-September period was estimated to be 46 billion gallons (bg), the fourth highest total since monitoring began in 1995 and ranked just after the 47 bg in both 2001 and 2002. This can be attributed, in part, to the growth of irrigation systems in the Imperial Valley, which now has 1,867 systems. To improve our understanding of the relationship between groundwater, stream discharge, and irrigation, an irrigation test site was initiated in April 2003. Nine observation wells were installed in close proximity to an irrigated field that abuts Crane Creek. Transducers with data loggers were installed in two wells in June 2003 to monitor groundwater levels and in Crane Creek to monitor stream stage. Preliminary data are presented. | | | | Date Created: | 9 15 2005 | | | | Agency ID: | CR-2005-06 | | | | ISL ID: | 000000000911 Original UID: 999999994457 FIRST WORD: Operation | |
| 296: | | Title: | | | | | Volume/Number: | 2002 | | | | Issuing Agency: | | | | | Description: | A dense raingage network has operated in Cook County since the fall of 1989, to provide accurate precipitation 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, a comparison of rainfall amounts obtained via analog chart and data logger, and an analysis of precipitation for Water Year 2001 (October 2000 - September 2001). The data analyses include 1) monthly and Water Year 2001 amounts at all sites, 2) Water Year 2001 amounts in comparison to patterns from network Water Years 1990-2000, and 3) the 12-year network precipitation average for Water Years 1990-2001. Also included are raingage site descriptions, instructions for raingage technicians, documentation of raingage maintenance, and documentation of high storm totals. | | | | Date Created: | 9 24 2004 | | | | Agency ID: | CR-2002-03 | | | | ISL ID: | 000000000860 Original UID: 999999994340 FIRST WORD: Operation, | |
| 297: | | Title: | | | | | Volume/Number: | 2005 | | | | Issuing Agency: | | | | | Description: | This water quality monitoring plan describes the monitoring recommended to provide data needed to improve calibration of the watershed loading (HSPF) and receiving stream (QUAL2) models for the Fox River watershed. Various monitoring schemes were considered in light of available resources. Data gaps identified in the Phase I report as well as preliminary model simulations also were considered in preparing this monitoring plan. Because available resources are a limiting factor, closing data gaps is the primary objective of the proposed monitoring plan. Should additional funds become available, specific additional data collection scenarios would enhance the reliability of the models. These recommendations are written to be incorporated by the Fox River Study Group, Inc. (FRSG) into the request for proposals (RFP) to conduct the monitoring. The proposed monitoring requires installation and operation of the following: (1) 9 hourly precipitation stations, (2) 11 stream flow gages, (3) 29 ambient water quality monitoring sites, and (4) 16 stations with continuous operation during selected low flow periods. In addition, active combined sewer overflows shall be sampled, five sediment oxygen demand tests shall be performed on the Fox River mainstem, and bed substrate from ten sites shall be analyzed. Preliminary site locations are identified. | | | | Date Created: | 12 21 2005 | | | | Agency ID: | CR-2005-13 | | | | ISL ID: | 000000000940 Original UID: 999999994470 FIRST WORD: Overview | |
| 298: | | Title: | | | | | 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 | |
| 299: | | Title: | | | | | Volume/Number: | 2005 | | | | Issuing Agency: | | | | | Description: | The Consumers Illinois Water Company applied for and received a grant to conduct a diagnostic-feasibility study on Lake Vermilion commencing in May 2000. Lake Vermilion is a 878-acre public lake that serves as the public water-supply source for the City of Danville and surrounding communities in Vermilion County, Illinois. The lake is located in the Second Principle Meridian, Township 20N, Range 11W, Section 31 one mile northwest of the City of Danville. Lake Vermilion has a maximum depth of 21.8 feet, a mean depth of 9.1 feet, a shoreline length of 14.3 miles, and an average retention time of 0.042 years. The Lake Vermilion watershed, including the lake surface area, is 190,720 acres or 298 square miles. The main inflow tributarary is the North Fork of the Vermilion River. The diagnostic study was designed to delineate the existing lake conditions, to examine the causes of degradation, if any, and to identify and quantity the sources of plant nutrients and any other pollutants flowing into the lake. On the basis of the findings of the diagnostic study, water quality goals will be established for the lake and a restoration feasibility study will be conducted by Cochran and Wilken, Inc. of Springfield. Under the feasibility study, alternative management techniques will be evaluated in relation to the established management goals. | | | | Date Created: | 4 19 2006 | | | | Agency ID: | CR-2005-10 | | | | ISL ID: | 000000000953 Original UID: 999999994458 FIRST WORD: Phase | |
| 300: | | Title: | | | | | Volume/Number: | 2000 | | | | Issuing Agency: | | | | | Description: | The Champaign County Forest Preserve District (CCFPD) applied for and received a grant to conduct a diagnostic-feasibility study on Homer Lake commencing in April 1997. Homer Lake is an 83-acre public lake within the Salt Fork River Forest Preserve in Champaign County, Illinois. The lake is located in the Second Principle Meridian, Township 19N, Range 14W, Section 31; it is 3 miles northwest of the town of Homer. Homer Lake has a maximum depth of 19 feet, a mean depth of 7.4 feet, a shoreline length of .3 miles, and an average retention time of 0.097 years. The Homer Lake watershed, including the lake surface area, is 9,280 acres. The two inflow tributaries are Conkey Branch and the west branch (unnamed). The diagnostic study was designed to delineate the existing lake conditions, to examine the cases of degradation, if any, and to identify and quantity the sources of plant nutrients and any other pollutants flowing into the lake. On the basis of the findings of the diagnostic study, water quality goals were established for the lake. Alternative management techniques were then evaluated in relation to the established goals. | | | | Date Created: | 9 24 2004 | | | | Agency ID: | CR-2000-13 | | | | ISL ID: | 000000000828 Original UID: 999999994305 FIRST WORD: Phase | |
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