Observed and urbanization-adjusted annual maximum peak discharge and associated urban fraction and precipitation values at USGS streamgage:
05531080 SPRING BROOK AT BLOOMINGDALE, 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 0.420 1.438 176 282 0.228
1962 1 -- 0 0.436 0.254 146 244 0.379
1963 1 -- 0 0.451 1.159 173 272 0.259
1964 1 4B 0 0.467 0.254 70 137 0.874
1965 1 4B 0 0.482 0.254 70 135 0.881
1966 1 -- 0 0.498 1.332 98 168 0.740
1967 1 -- 0 0.513 1.408 98 166 0.752
1968 1 -- 0 0.529 1.307 90 153 0.806
1969 1 -- 0 0.544 1.305 16 37 1.000
1970 1 -- 0 0.560 1.318 126 192 0.616
1971 1 -- 0 0.582 0.365 114 174 0.713
1972 1 -- 0 0.605 1.199 645 803 0.007
1973 1 -- 0 0.628 0.445 193 259 0.308
1974 1 -- 0 0.651 0.535 263 335 0.137
1975 1 -- 0 0.674 0.980 256 320 0.159
1976 1 -- 0 0.697 0.988 165 212 0.521
1977 1 -- 0 0.720 0.738 181 225 0.461
1978 1 -- 0 0.743 1.237 158 194 0.605
1979 1 -- 0 0.766 1.245 180 214 0.513