Observed and urbanization-adjusted annual maximum peak discharge and associated urban fraction and precipitation values at USGS streamgage:
05533300 WARDS CREEK NEAR WOODRIDGE, 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
1962 1 -- 0 0.306 0.420 60 116 0.289
1963 1 2 0 0.344 1.400 20 56 0.922
1964 1 -- 0 0.382 1.510 35 74 0.745
1965 1 -- 0 0.421 0.980 55 100 0.449
1966 1 -- 0 0.459 4.121 151 225 0.026
1967 1 -- 0 0.497 1.180 109 166 0.084
1968 1 -- 0 0.536 3.071 48 81 0.665
1969 1 -- 0 0.574 1.741 73 110 0.348
1970 1 -- 0 0.612 1.300 95 132 0.186
1971 1 -- 0 0.627 0.560 70 102 0.438
1972 1 -- 0 0.642 3.301 87 119 0.257
1973 1 -- 0 0.656 2.171 94 126 0.214
1974 1 -- 0 0.671 1.611 102 134 0.179
1975 1 -- 0 0.686 2.301 146 186 0.053
1976 1 -- 0 0.701 4.381 101 130 0.196