Observed and urbanization-adjusted annual maximum peak discharge and associated urban fraction and precipitation values at USGS streamgage:
05536340 MIDLOTHIAN CREEK AT OAK FOREST, 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
1951 1 -- 0 0.209 1.322 375 283 0.138
1952 1 D 0 0.231 0.943 256 205 0.370
1953 1 -- 0 0.253 1.143 384 279 0.145
1954 1 E 0 0.275 1.648 248 193 0.428
1955 1 -- 0 0.296 3.274 569 383 0.047
1956 1 E 0 0.318 0.738 204 157 0.618
1957 1 -- 0 0.340 2.400 550 360 0.058
1958 1 E 0 0.362 1.396 168 130 0.767
1959 1 E 0 0.383 1.260 228 162 0.593
1960 1 E 0 0.405 0.049 210 148 0.669
1961 1 E 0 0.415 1.454 328 213 0.328
1962 1 D 0 0.426 0.300 210 145 0.686
1963 1 E 0 0.436 1.514 226 152 0.643
1964 1 E 0 0.446 0.493 128 98 0.911
1965 1 -- 0 0.456 0.892 192 131 0.763
1966 1 D 0 0.466 1.302 391 236 0.236
1967 1 -- 0 0.477 1.147 237 152 0.644
1968 1 -- 0 0.487 1.460 314 193 0.425
1969 1 -- 0 0.497 0.925 158 107 0.874
1970 1 -- 0 0.507 1.102 296 180 0.494
1971 1 -- 0 0.528 0.308 178 114 0.843
1972 1 -- 0 0.548 1.234 271 159 0.607
1973 1 -- 0 0.569 1.306 501 272 0.158
1974 0 5C 950 0.590 1.245 210 152 0.649
1975 2 5C 950 0.610 0.665 251 220 0.295
1976 2 5C 950 0.631 1.050 201 176 0.516
1977 2 5C 950 0.651 1.394 166 144 0.698
1978 2 5C 950 0.672 0.822 224 187 0.460
1979 2 5C 950 0.692 0.843 253 205 0.367
1980 2 5C 950 0.713 1.040 128 105 0.885
1981 2 5C 950 0.717 1.915 350 274 0.156
1982 2 5C 950 0.721 0.387 192 152 0.646
1983 2 5C 950 0.725 1.419 300 234 0.244
1984 2 5C 950 0.730 0.745 244 190 0.441
1985 2 5C 950 0.734 0.836 222 173 0.531
1986 2 5C 950 0.738 0.844 125 98 0.908
1987 2 5C 950 0.742 1.094 267 205 0.366
1988 0 5C 1566 0.747 0.606 131 118 0.827
1989 3 5C 1566 0.751 1.303 305 312 0.097
1990 3 5C 1566 0.755 2.495 261 266 0.170
1991 3 5C 1566 0.757 3.148 339 345 0.066
1992 3 5C 1566 0.759 4.067 183 186 0.461
1993 3 5C 1566 0.761 1.063 187 190 0.443
1994 3 5C 1566 0.763 1.672 152 154 0.633
1995 3 5C 1566 0.765 1.139 174 176 0.514
1996 3 5C 1566 0.767 3.482 382 385 0.045
1997 3 5C 1566 0.769 2.466 259 261 0.180
1998 3 5C 1566 0.771 1.572 214 215 0.315
1999 3 5C 1566 0.772 1.174 197 198 0.406
2000 3 5C 1566 0.774 3.777 298 298 0.116
2001 3 5C 1566 0.774 0.915 241 241 0.223
2002 3 5C 1566 0.775 2.696 260 260 0.181
2003 3 5C 1566 0.775 2.264 236 236 0.237
2004 3 5C 1566 0.775 2.196 295 295 0.121
2005 3 5C 1566 0.775 0.925 159 159 0.604
2006 3 5C 1566 0.775 2.927 217 217 0.305
2007 3 5C 1566 0.775 2.661 225 225 0.274
2008 3 5C 1566 0.775 4.522 325 325 0.082
2009 3 5C 1566 0.775 1.760 318 318 0.090