Changes in channel geometry and volume determined for two reaches of the Kankakee River in Illinois

Changes in channel geometry and volume determined for two reaches of the Kankakee River in Illinois

The upstream reaches of the Kankakee River in Indiana have been straightened to facilitate agriculture; the downstream reaches of the river in Illinois have not been altered. Concerns about the adjustments of the river in response to these disturbances have led to studies of sedimentation along the Kankakee River in Illinois. The U.S. Geological Survey (USGS), in cooperation with the Kankakee County Soil and Water Conservation District, began a study in 1992 to determine sedimentation characteristics of the Kankakee River in Illinois. Some of the adjustments of the Kankakee River to land-use changes and channelization in the upstream drainage area are documented in a recently released report by the USGS.

Changes in channel geometry and volume were determined by comparing measurements of cross-section geometry over time in two reaches of the Kankakee River. Data used for the study included cross-section measurements made by two State of Illinois agencies from 1959 to 1980 and measurements made by the USGS in 1994. Data analysis indicated a net aggradation of 133,600 cubic yards (yd3) of sediment in the Momence Wetlands reach near Momence, Ill., from 1980 to 1994. A net aggradation of about 298,600 yd3 of sediment was indicated for the Six-Mile Pool, a pooled reach of the river upstream from a dam near Kankakee, from 1978 to 1994.

The report, titled "Changes in Cross-Section Geometry and Channel Volume in Two Reaches of the Kankakee River in Illinois, 1959-94," by Paul J. Terrio and John E. Nazimek, is published as U.S. Geological Survey Water-Resources Investigations Report 96-4261. Copies are available for inspection at the U.S. Geological Survey, 221 N. Broadway Ave., Urbana, Ill., and at large public and university libraries nationwide. Paper and microfiche copies can be purchased at cost from the U.S. Geological Survey, Branch of Information Services, Box 25286, MS 517, Federal Center, Denver, CO 80225-0046 (phone number is (303) 202-4700). Orders must include check or money order payable to the U.S. Department of the Interior--U.S. Geological Survey and must specify report number WRIR 96-4261.