Observed and urbanization-adjusted annual maximum peak discharge and associated urban fraction and precipitation values at USGS streamgage:
05530940 SALT CREEK AT PALATINE, 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
1961 1 -- 0 0.377 1.273 215 363 0.192
1962 1 -- 0 0.403 0.269 177 309 0.341
1963 1 -- 0 0.428 2.012 171 296 0.390
1964 1 -- 0 0.454 0.901 106 201 0.764
1965 1 -- 0 0.479 0.010 151 255 0.539
1966 1 -- 0 0.505 1.231 173 280 0.449
1967 1 -- 0 0.530 1.229 482 661 0.021
1968 1 -- 0 0.555 4.153 180 276 0.463
1969 1 -- 0 0.581 2.462 184 274 0.469
1970 1 -- 0 0.606 2.872 275 375 0.179
1971 1 -- 0 0.631 0.386 183 260 0.523
1972 1 -- 0 0.656 1.751 513 641 0.025
1973 1 -- 0 0.680 2.202 356 450 0.095
1974 1 -- 0 0.705 1.131 210 273 0.475
1975 1 -- 0 0.730 1.851 205 260 0.521
1976 1 -- 0 0.754 1.891 148 191 0.801
1978 1 -- 0 0.804 2.202 249 289 0.417
1979 1 -- 0 0.828 0.380 148 174 0.857
1980 1 -- 0 0.853 0.951 122 142 0.940