The Electronic Documents of Illinois provides permanent public access to official publications of the State of Illinois which have been deposited in electronic form.
Streamflow frequency estimates for two major watersheds, the Mackinaw and Vermilion River watersheds in the Illinois River Basin, were prepared for use with the Illinois Streamflow Assessment Model (ILSAM). ILSAM is a water resource planning and management tool that produces statistical estimates of flow quantity at both gaged and ungaged sites on Illinois streams.
The Illinois Teacher Salary Study is conducted annually. Pursuant to Section 2-3.103 of the Illinois School Code, this publication contains information on teacher salary policies, salaries paid, and fringe benefits. Data in this report are presented in two sections. Section I contains tables with statewide summaries. Section II includes data for each district.
In continuation of the efforts made by the Illinois State Water Survey to develop a detailed hydrologic and water quality simulation model of the entire Illinois River Basin, a hydrologic simulation model was developed for the Vermilion River Watershed (one of the major tributaries of the Illinois River) to simulate streamflows using available climatic data. The model was developed using Hydrologic Simulation Program FORTRAN (HSPF, version 12) under the BASINS (Better Assessment Science Integrating Point and Nonpoint Sources, version 3.0), a multipurpose environmental analysis system developed by the U.S. Environmental Protection Agency (USEPA).
Watershed modeling applications for the Fox and Iroquois River watersheds in Illinois were used to evaluate the response in simulated streamflow to various climate scenarios. The climate scenarios applied to both watersheds are based on simulations from two global climate models, the Japan and Hadley models, which respectively represent comparatively dry and wet scenarios of future climatic conditions.
Watershed scale hydrologic simulation models HSPF (Hydrologic Simulation Program FORTRAN) and SWAT (Soil and Water Assessment Tool) were used to model the hydrology of the 2150 square mile Iroquois River watershed (IRW) located in the east central Illinois.