Observed and urbanization-adjusted annual maximum peak discharge and associated urban fraction and precipitation values at USGS streamgage:
05437950 KISHWAUKEE RIVER NEAR HUNTLEY, 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
1965 1 -- 0 0.077 0.061 105 174 0.645
1966 1 -- 0 0.080 0.512 150 236 0.397
1967 1 -- 0 0.082 0.920 154 241 0.382
1968 1 -- 0 0.085 1.296 89 152 0.741
1969 1 -- 0 0.088 1.366 125 200 0.537
1970 1 -- 0 0.091 1.559 124 198 0.546
1971 1 -- 0 0.096 0.427 139 218 0.465
1972 1 -- 0 0.102 0.696 192 283 0.254
1973 1 -- 0 0.108 1.560 136 211 0.490
1974 1 -- 0 0.113 1.139 120 188 0.591
1975 1 -- 0 0.119 0.033 91 149 0.752
1976 1 -- 0 0.124 1.295 172 254 0.339
1977 1 -- 0 0.130 0.821 70 120 0.854
1978 1 -- 0 0.136 1.463 144 216 0.471