Observed and urbanization-adjusted annual maximum peak discharge and associated urban fraction and precipitation values at USGS streamgage:
05527870 MILL CREEK AT WEDGES CORNER, 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
1960 1 7 0 0.218 0.548 326 420 0.011
1962 1 -- 0 0.229 0.251 118 163 0.223
1963 1 -- 0 0.234 1.538 32 55 0.921
1964 1 4B 0 0.239 0.251 39 64 0.880
1965 1 -- 0 0.244 0.769 93 132 0.396
1966 1 -- 0 0.250 0.482 44 69 0.847
1967 1 -- 0 0.255 1.318 69 100 0.630
1968 1 -- 0 0.260 0.544 31 52 0.932
1969 1 -- 0 0.266 1.387 92 128 0.421
1970 1 -- 0 0.271 1.615 95 131 0.401
1971 1 -- 0 0.276 0.454 163 212 0.098
1972 1 -- 0 0.282 0.468 76 106 0.586
1973 1 -- 0 0.288 1.418 85 116 0.501
1974 1 -- 0 0.293 1.140 138 178 0.175
1975 1 -- 0 0.299 0.841 74 102 0.619
1976 1 -- 0 0.305 1.350 125 161 0.233