Observed and urbanization-adjusted annual maximum peak discharge and associated urban fraction and precipitation values at USGS streamgage:
05551060 NORTON CREEK NEAR ST. CHARLES, 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
1957 1 7 0 0.108 2.267 204 380 0.174
1962 1 -- 0 0.138 0.289 84 194 0.756
1963 1 -- 0 0.145 1.223 54 147 0.901
1964 1 -- 0 0.151 0.683 42 126 0.940
1965 1 -- 0 0.158 0.134 75 177 0.812
1966 1 -- 0 0.165 1.366 210 372 0.185
1967 1 -- 0 0.172 1.167 954 1430 0.000
1968 1 -- 0 0.179 1.487 150 288 0.406
1969 1 -- 0 0.186 1.274 124 245 0.556
1970 1 -- 0 0.193 1.417 264 449 0.100
1971 1 -- 0 0.200 0.357 157 293 0.390
1972 1 -- 0 0.208 0.562 152 284 0.420
1973 1 -- 0 0.216 1.372 134 254 0.522
1974 1 -- 0 0.223 1.197 98 200 0.734
1975 1 -- 0 0.231 0.036 152 278 0.439
1976 1 -- 0 0.239 1.099 142 261 0.497
1977 1 -- 0 0.247 0.633 47 122 0.947
1978 1 -- 0 0.254 1.357 101 199 0.739
1979 1 -- 0 0.262 0.712 149 266 0.480