Observed and urbanization-adjusted annual maximum peak discharge and associated urban fraction and precipitation values at USGS streamgage:
05535700 WF OF NB CHICAGO RIVER AT GLENVIEW, 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
1960 1 -- 0 0.455 0.330 713 1040 0.227
1961 1 -- 0 0.474 1.571 647 952 0.309
1962 1 -- 0 0.493 0.222 491 744 0.557
1963 1 -- 0 0.511 0.944 397 616 0.730
1964 1 -- 0 0.530 2.137 432 646 0.691
1965 1 -- 0 0.549 0.384 319 500 0.862
1966 1 -- 0 0.568 1.506 678 916 0.351
1967 1 -- 0 0.587 1.933 1140 1450 0.075
1968 1 -- 0 0.606 1.693 527 707 0.606
1969 1 -- 0 0.624 1.303 905 1120 0.184
1970 1 -- 0 0.643 1.298 638 809 0.478
1971 1 -- 0 0.654 0.418 472 612 0.735
1972 1 -- 0 0.664 2.114 1000 1190 0.155
1973 1 -- 0 0.674 0.712 733 890 0.383
1974 1 -- 0 0.685 0.564 666 807 0.482
1975 1 -- 0 0.695 1.161 761 902 0.368
1976 1 -- 0 0.706 1.411 937 1080 0.205
1977 1 -- 0 0.716 1.169 224 297 0.978