Environmental setting of the upper Illinois River basin and implications for water quality

Water-Resources Investigations Report 98-4268
By: , and 



The upper Illinois River Basin (UIRB) is the 10,949 square mile drainage area upstream from Ottawa, Illinois, on the Illinois River. The UIRB is one of 13 studies that began in 1996 as part of the U.S. Geological Survey?s National Water- Quality Assessment program. A compilation of environmental data from Federal, State, and local agencies provides a description of the environmental setting of the UIRB. Environmental data include natural factors such as bedrock geology, physiography and surficial geology, soils, vegetation, climate, and ecoregions; and human factors such as land use, urbanization trends, and population change. Characterization of the environmental setting is useful for understanding the physical, chemical, and biological characteristics of surface and ground water in the UIRB and the possible implications of that environmental setting for water quality. Some of the possible implications identified include depletion of dissolved oxygen because of high concentrations of organic matter in wastewater, increased flooding because of suburbanization, elevated arsenic concentrations in ground water because of weathering of shale bedrock, and decreasing ground-water levels because of heavy pumping of water from the bedrock aquifers.

Additional publication details

Publication type Report
Publication Subtype USGS Numbered Series
Title Environmental setting of the upper Illinois River basin and implications for water quality
Series title Water-Resources Investigations Report
Series number 98-4268
DOI 10.3133/wri984268
Edition -
Year Published 1999
Language ENGLISH
Publisher U.S. Dept. of the Interior, U.S. Geological Survey ; Branch of Information Services [distributor],
Description vii, 67 p. :ill. (some col.), maps (some col.) ;28 cm.