Observed and urbanization-adjusted annual maximum peak discharge and associated urban fraction and precipitation values at USGS streamgage:
05536235 DEER CREEK NEAR CHICAGO HEIGHTS, 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
1948 1 5 600 0.142 1.939 663 1070 0.185
1949 1 5E 600 0.147 0.884 376 673 0.571
1950 1 5 600 0.152 1.525 438 762 0.459
1951 1 5 600 0.162 2.744 467 797 0.419
1952 1 5 600 0.172 1.154 419 720 0.508
1953 1 5 600 0.181 1.618 435 737 0.488
1954 1 5 600 0.191 1.503 417 704 0.529
1955 1 5 600 0.201 3.802 637 982 0.237
1956 1 5 600 0.210 1.345 467 762 0.459
1957 1 5 600 0.220 2.481 1380 1930 0.024
1958 1 5 600 0.230 1.557 471 754 0.469
1959 1 5 600 0.239 1.382 850 1240 0.119
1960 1 5 600 0.249 1.392 430 683 0.557
1961 1 5 600 0.255 1.846 510 788 0.430
1962 1 5E 600 0.261 0.231 250 439 0.852
1963 1 5E 600 0.268 1.654 149 300 0.952
1964 1 5E 600 0.274 1.098 141 284 0.957
1965 1 5 600 0.280 0.851 443 680 0.562
1966 1 5 600 0.286 1.930 898 1250 0.114
1967 1 5 600 0.293 1.253 459 692 0.545
1968 1 5 600 0.299 1.944 874 1210 0.130
1969 1 5 600 0.305 0.600 558 812 0.403
1970 1 5 600 0.311 1.381 447 664 0.584
1971 1 5 600 0.317 0.245 289 463 0.829
1972 1 5E 600 0.322 1.258 342 527 0.759
1973 1 5 600 0.327 1.009 722 986 0.234
1974 1 5 600 0.332 1.563 610 854 0.357
1975 1 5 600 0.338 1.428 542 768 0.453
1976 1 5 600 0.343 1.669 607 843 0.369
1977 1 5E 600 0.348 1.236 425 612 0.648
1978 1 5 600 0.353 0.417 454 645 0.608
1979 1 5 600 0.358 0.676 533 741 0.485
1980 1 5E 600 0.364 0.934 616 837 0.375
1981 1 5 600 0.366 2.119 848 1110 0.170
1982 1 5 600 0.368 0.564 704 933 0.278
1983 1 5 600 0.370 2.390 848 1100 0.172
1984 1 5 600 0.373 1.044 623 839 0.374
1985 1 5 600 0.375 0.993 727 953 0.260
1986 1 5 600 0.377 1.338 630 843 0.369
1987 1 5 600 0.379 1.512 409 575 0.700
1988 1 5 600 0.381 0.796 428 596 0.671
1989 1 5E 600 0.384 1.819 739 959 0.254
1990 1 5 600 0.386 0.891 446 614 0.647
1991 1 5 600 0.390 2.410 809 1040 0.200
1992 1 5C 600 0.394 0.417 470 638 0.617
1993 1 5C 600 0.397 1.851 830 1050 0.192
1994 1 5C 600 0.401 1.009 707 910 0.298
1995 1 5C 600 0.405 1.131 478 640 0.614
1996 1 5C 600 0.409 3.559 824 1040 0.200
1997 1 5C 600 0.413 2.093 803 1010 0.219
1998 1 5C 600 0.416 1.963 632 816 0.399
1999 1 5C 600 0.420 0.617 587 760 0.463
2000 1 5C 600 0.424 0.823 678 861 0.349
2001 1 5C 600 0.447 0.635 645 806 0.410
2002 1 5C 600 0.470 1.568 755 908 0.299
2003 1 5C 600 0.493 1.436 597 716 0.516
2004 1 5C 600 0.516 1.784 413 497 0.792
2005 1 5C 600 0.539 1.120 674 765 0.457
2006 0 5C 862 0.562 1.671 873 -- --
2007 0 5C 862 0.585 1.551 1320 -- --
2008 0 5C 862 0.608 3.777 1320 -- --
2009 0 5C 862 0.630 1.744 509 -- --