Observed and urbanization-adjusted annual maximum peak discharge and associated urban fraction and precipitation values at USGS streamgage:
05535400 WF OF NB CHICAGO RIVER AT DEERFIELD, 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
1961 1 -- 0 0.423 1.783 324 573 0.474
1962 1 -- 0 0.440 0.248 290 514 0.582
1963 1 -- 0 0.458 1.121 247 449 0.712
1964 1 -- 0 0.476 1.792 376 616 0.400
1965 1 -- 0 0.494 0.498 208 385 0.826
1966 1 -- 0 0.512 1.315 324 526 0.557
1967 1 -- 0 0.530 1.492 571 829 0.155
1968 1 -- 0 0.548 1.174 355 550 0.515
1969 1 -- 0 0.565 1.286 418 621 0.391
1970 1 -- 0 0.583 1.330 370 550 0.514
1971 1 -- 0 0.595 0.387 272 424 0.759
1972 1 -- 0 0.607 0.690 531 725 0.229
1973 1 -- 0 0.619 1.387 477 658 0.321
1974 1 -- 0 0.631 1.035 364 517 0.575
1975 1 -- 0 0.644 0.963 367 514 0.580
1976 1 -- 0 0.656 0.960 455 615 0.403