Time of concentration and storage coefficient values for Illinois streams

Water-Resources Investigations Report 82-13
Prepared in cooperation with the Illinois Department of Transportation Division of Water Resources
By: , and 



Values of time of concentration and storage coefficient, two unit hydrograph parameters, are presented for 194 and 120 basins in Illinois. Tabulated values consist of those computed by previous investigators as well as those computed for 98 basins as part of this investigation. These additional values were computed by calibration of the U.S. Army Corps of Engineers Flood Hydrograph Package (HEC-1). The significance of differences in method used by each investigator to compute these unit hydrography parameters was evaluated by statistical comparison of four sets of time of concentration values and three sets of storage coefficient values. Because no difference due to method was identified, it is concluded that all of the values tabulated in this report can be used in any application for which time of concentration and storage coefficient are required.

Study Area

Publication type Report
Publication Subtype USGS Numbered Series
Title Time of concentration and storage coefficient values for Illinois streams
Series title Water-Resources Investigations Report
Series number 82-13
DOI 10.3133/wri8213
Year Published 1982
Language English
Publisher U.S. Geological Survey, Water Resources Division,
Publisher location Urbana, IL
Description v, 35 p.
Country United States
State Illinois
Online Only (Y/N) N
Additional Online Files (Y/N) N
Google Analytic Metrics Metrics page
Additional publication details