Observed and urbanization-adjusted annual maximum peak discharge and associated urban fraction and precipitation values at USGS streamgage:
05529300 MC DONALD CREEK NEAR WHEELING, 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
1955 1 7 0 0.382 3.446 372 565 0.012
1957 1 7 0 0.448 2.696 698 978 0.000
1961 1 -- 0 0.581 1.545 138 206 0.393
1962 1 -- 0 0.616 0.225 80 128 0.826
1963 1 -- 0 0.651 1.127 39 72 0.982
1964 1 -- 0 0.685 1.775 76 115 0.892
1965 1 -- 0 0.720 0.500 76 110 0.911
1966 1 -- 0 0.755 1.140 125 159 0.654
1967 1 -- 0 0.790 1.483 389 442 0.026
1968 1 -- 0 0.824 1.175 184 211 0.363
1969 1 -- 0 0.859 1.289 181 201 0.421
1970 1 -- 0 0.894 1.318 326 343 0.065
1971 1 -- 0 0.900 0.382 169 180 0.531
1972 1 -- 0 0.906 1.056 485 503 0.017
1973 1 -- 0 0.912 0.781 221 230 0.262
1974 1 -- 0 0.917 1.036 244 252 0.197
1975 1 -- 0 0.923 0.963 271 279 0.149
1976 1 -- 0 0.929 0.961 257 263 0.178
1977 1 -- 0 0.935 1.198 51 53 1.000
1978 1 -- 0 0.941 1.483 178 181 0.526
1979 1 -- 0 0.947 0.896 222 223 0.289