Observed and urbanization-adjusted annual maximum peak discharge and associated urban fraction and precipitation values at USGS streamgage:
05536620 MILL CREEK NEAR PALOS 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
1961 1 -- 0 0.293 1.419 208 270 0.098
1962 1 -- 0 0.306 0.281 101 139 0.563
1963 1 -- 0 0.319 1.531 100 136 0.583
1964 1 -- 0 0.331 0.734 54 80 0.891
1965 1 -- 0 0.344 0.884 118 154 0.473
1966 1 -- 0 0.357 1.424 330 395 0.027
1967 1 -- 0 0.370 1.152 203 247 0.138
1968 1 2 0 0.382 1.422 134 167 0.405
1969 1 -- 0 0.395 0.408 69 90 0.842
1970 1 -- 0 0.408 1.091 181 214 0.205
1971 1 -- 0 0.418 0.903 38 52 0.963
1972 1 -- 0 0.429 1.213 157 184 0.318
1973 1 -- 0 0.439 0.845 163 189 0.296
1974 1 -- 0 0.450 1.142 110 129 0.625
1975 1 -- 0 0.460 1.072 122 141 0.553
1976 1 -- 0 0.471 0.889 99 114 0.716
1977 1 -- 0 0.481 1.447 80 92 0.832