Observed and urbanization-adjusted annual maximum peak discharge and associated urban fraction and precipitation values at USGS streamgage:
05529500 MC DONALD CREEK NEAR MOUNT PROSPECT, 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
1953 1 E 0 0.381 0.694 27 65 0.982
1954 1 -- 0 0.421 1.496 103 144 0.638
1955 1 -- 0 0.460 3.333 146 184 0.394
1956 1 E 0 0.500 1.244 45 78 0.961
1957 1 -- 0 0.540 2.423 430 435 0.018
1958 1 E 0 0.580 0.216 42 67 0.980
1959 1 E 0 0.620 0.371 76 97 0.918
1960 1 -- 0 0.659 0.384 261 253 0.140
1961 1 -- 0 0.684 1.492 194 190 0.350
1962 1 -- 0 0.708 0.233 154 152 0.585
1963 1 E 0 0.732 1.128 44 54 1.000
1964 1 -- 0 0.756 0.783 74 79 0.959
1965 1 -- 0 0.780 0.501 93 93 0.932
1966 1 -- 0 0.804 1.319 175 154 0.570
1967 1 D 0 0.829 1.478 618 501 0.013
1968 1 -- 0 0.853 1.166 134 114 0.827
1969 1 -- 0 0.877 1.288 239 192 0.339
1970 1 D 0 0.901 1.323 434 336 0.045
1971 1 2E 0 0.906 0.383 260 202 0.280
1972 1 -- 0 0.911 0.683 664 507 0.013
1973 1 -- 0 0.916 1.380 396 303 0.068
1974 1 -- 0 0.921 0.520 291 222 0.206
1975 1 -- 0 0.927 0.960 276 210 0.245
1976 1 D 0 0.932 0.965 305 231 0.186
1977 1 E 0 0.937 0.725 86 66 0.980
1978 1 -- 0 0.942 1.190 204 153 0.574
1979 1 -- 0 0.947 0.898 246 184 0.396
1980 1 E 0 0.952 0.745 144 107 0.869
1981 1 E 0 0.953 0.927 247 183 0.398
1982 1 -- 0 0.953 1.935 484 358 0.037
1983 1 -- 0 0.954 1.505 548 406 0.023
1984 1 E 0 0.954 0.677 148 110 0.853
1985 1 E 0 0.955 1.247 346 256 0.136
1986 1 -- 0 0.955 0.786 403 298 0.072
1987 1 -- 0 0.956 2.799 806 596 0.007
1988 1 E 0 0.956 0.738 146 108 0.864
1989 1 E 0 0.957 1.526 232 171 0.468
1990 0 E 540 0.957 1.669 208 179 0.424
1991 2 E 540 0.957 2.012 121 121 0.790
1992 2 CE 540 0.957 1.805 115 115 0.824
1993 2 CE 540 0.957 1.142 160 160 0.534
1994 2 CE 540 0.957 1.414 180 180 0.417
1995 2 CE 540 0.957 0.913 202 202 0.278
1996 2 C 540 0.957 0.925 194 194 0.322
1997 2 CE 540 0.957 2.375 322 322 0.051
1998 2 CE 540 0.957 1.624 111 111 0.846
1999 2 C 540 0.957 1.424 286 286 0.086
2000 2 CE 540 0.957 1.924 153 153 0.576
2001 2 CE 540 0.957 2.745 206 206 0.260
2002 2 C 540 0.957 0.310 345 345 0.042
2003 2 CE 540 0.957 1.597 135 135 0.707
2004 2 CE 540 0.957 0.120 171 171 0.470
2005 2 C 540 0.957 0.580 141 141 0.662
2006 2 CE 540 0.957 0.508 90 90 0.939
2007 2 C 540 0.957 1.904 220 220 0.213
2008 2 CE 540 0.957 4.253 474 474 0.015
2009 2 C 540 0.957 1.039 252 252 0.143