Fig. 2From: Conservation potential of North American large rivers: the Wabash River compared with the Ohio and Illinois rivers3-day minimum flow by year calculated by Indicators of Hydrologic Alteration software (Richter et al. 1996) for the Montezuma USGS gaging station on the Wabash River (top), fall rate by year for the Valley City USGS gaging station on the Illinois River (middle), and fall rate by year for the Louisville USGS gaging station on the Ohio River (bottom)Back to article page