Observed and urbanization-adjusted annual maximum peak discharge and associated urban fraction and precipitation values at USGS streamgage:
05535070 SKOKIE RIVER NEAR HIGHLAND PARK, 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
1967 1 -- 0 0.573 1.379 410 590 0.420
1968 1 E 0 0.589 0.636 388 553 0.484
1969 1 -- 0 0.606 2.176 500 673 0.275
1970 1 -- 0 0.623 1.886 368 510 0.562
1971 1 -- 0 0.629 0.339 344 478 0.625
1972 1 -- 0 0.636 1.716 570 735 0.204
1973 1 -- 0 0.642 0.685 422 566 0.462
1974 1 -- 0 0.649 1.068 440 584 0.431
1975 1 -- 0 0.655 0.599 381 509 0.564
1976 1 D 0 0.661 1.704 512 655 0.299
1977 1 E 0 0.668 1.085 164 255 0.957
1978 1 -- 0 0.674 1.655 326 437 0.712
1979 1 -- 0 0.681 0.985 388 504 0.573
1980 1 -- 0 0.687 0.916 263 360 0.845
1981 1 -- 0 0.691 0.827 351 456 0.671
1982 1 -- 0 0.695 2.508 716 869 0.124
1983 1 -- 0 0.699 2.581 724 875 0.121
1984 1 -- 0 0.703 2.126 381 484 0.612
1985 1 -- 0 0.707 0.825 524 643 0.321
1986 1 -- 0 0.711 1.474 584 705 0.236
1987 1 -- 0 0.715 4.184 895 1060 0.057
1988 1 -- 0 0.719 0.505 337 428 0.728
1989 1 -- 0 0.723 2.002 298 383 0.807
1990 1 -- 0 0.727 1.460 503 610 0.385
1991 1 -- 0 0.733 1.904 477 578 0.441
1992 1 E 0 0.738 1.832 281 358 0.848
1993 1 C 0 0.744 0.777 372 454 0.677
1994 1 C 0 0.750 1.057 665 770 0.182
1995 1 C 0 0.755 2.002 589 683 0.260
1996 1 C 0 0.761 1.618 745 851 0.134
1997 1 CE 0 0.767 2.785 894 1010 0.067
1998 1 C 0 0.773 0.999 300 363 0.839
1999 1 C 0 0.778 2.038 880 986 0.073
2000 1 C 0 0.784 1.549 634 713 0.227
2001 1 C 0 0.796 2.687 762 844 0.138
2002 1 C 0 0.809 3.055 1230 1330 0.025
2003 1 C 0 0.821 0.865 454 502 0.577
2004 1 C 0 0.833 1.128 536 581 0.436
2005 1 CE 0 0.846 0.785 553 591 0.419
2006 1 C 0 0.858 0.873 499 528 0.530
2007 1 C 0 0.871 1.752 745 771 0.182
2008 1 C 0 0.883 2.977 1150 1170 0.039
2009 1 C 0 0.895 0.638 857 867 0.126