Observed and urbanization-adjusted annual maximum peak discharge and associated urban fraction and precipitation values at USGS streamgage:
05536105 NB CHICAGO RIVER AT ALBANY AVENUE AT CHICAGO, IL

Observed annual peak-flood magnitudes were adjusted to 2010 land-use conditions on the basis of panel data regression model with fixed effect analysis. The symbols presented in the figure are: "observed annual peaks", "adjusted annual peaks", and "fraction of urbanization in the watershed"

Legend for Graph

Water year Segment Discharge code Cumulative reservoir storage (acre-feet) Urban fraction Precipitation (inches) Observed peak discharge (ft3/s) Adjusted peak discharge (ft3/s) Exceedance probability
1990 1 -- 3846 0.746 1.972 1890 2050 0.155
1991 1 -- 3846 0.749 2.304 1540 1680 0.280
1992 1 CD 4921 0.752 2.155 965 1070 0.715
1993 1 C 4921 0.755 1.085 1290 1410 0.461
1994 1 C 4921 0.758 0.629 1400 1520 0.386
1995 1 CE 4921 0.761 1.227 1370 1480 0.411
1996 1 C 4921 0.764 0.856 1280 1380 0.478
1997 1 C 4921 0.767 2.792 2360 2500 0.072
1998 1 CE 4921 0.770 1.164 954 1040 0.739
2000 1 CE 4921 0.776 1.072 963 1040 0.737
2001 1 C 4921 0.782 0.845 1620 1710 0.264
2002 1 C 4921 0.788 3.184 1800 1880 0.197
2003 1 CE 4921 0.793 1.386 1130 1190 0.621
2004 1 CE 4921 0.799 1.122 1030 1080 0.711
2005 1 CE 4921 0.805 0.697 1200 1240 0.578
2006 1 C 4921 0.811 0.765 1060 1090 0.702
2007 1 C 4921 0.817 1.553 2110 2140 0.135
2008 1 C 4921 0.823 4.296 3580 3610 0.019
2009 1 C 4921 0.829 2.213 2420 2430 0.081