Table 1 Hydrology variables that were significantly altered (P < 0.05) from Indicators of Hydrologic Alteration analysis (Richter et al. 1996) using daily discharge from the Valley City, Illinois, USGS gaging station on the lower Illinois River. We used discharge data from 1939 to 2015 to create hydrology variables, which were then regressed with year to detect significantly altered variables

From: Conservation potential of North American large rivers: the Wabash River compared with the Ohio and Illinois rivers