Observed and urbanization-adjusted annual maximum peak discharge and associated urban fraction and precipitation values at USGS streamgage:
05536460 TINLEY CREEK NEAR OAK FOREST, 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 2 0 0.210 1.427 386 674 0.418
1962 1 -- 0 0.230 0.270 261 484 0.710
1963 1 -- 0 0.250 1.512 430 709 0.371
1964 1 4 0 0.270 0.983 109 252 0.958
1965 1 -- 0 0.290 0.881 337 557 0.595
1966 1 -- 0 0.310 1.378 783 1130 0.085
1967 1 -- 0 0.330 1.145 488 733 0.340
1968 1 -- 0 0.350 1.449 447 671 0.423
1969 1 2 0 0.370 0.419 210 357 0.881
1970 1 -- 0 0.390 1.093 999 1320 0.049
1971 1 -- 0 0.420 0.311 197 322 0.917
1972 1 -- 0 0.449 1.226 501 675 0.418
1973 1 -- 0 0.478 1.330 715 897 0.184
1974 1 -- 0 0.508 1.196 569 714 0.364
1975 1 -- 0 0.537 1.021 575 701 0.382
1976 1 -- 0 0.566 0.924 352 434 0.783
1977 1 -- 0 0.596 1.427 266 327 0.913
1978 1 2 0 0.625 1.093 853 934 0.167
1979 1 2 0 0.654 0.863 260 293 0.938