Observed and urbanization-adjusted annual maximum peak discharge and associated urban fraction and precipitation values at USGS streamgage:
05531050 SALT CREEK NEAR WOOD DALE, 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
1955 1 7 0 0.263 3.529 610 1010 0.255
1957 1 7 0 0.305 0.041 287 547 0.795
1960 1 7 0 0.368 0.386 583 903 0.364
1961 1 -- 0 0.393 1.559 465 729 0.567
1962 1 -- 0 0.417 0.232 565 844 0.430
1963 1 -- 0 0.441 1.362 305 498 0.846
1964 1 -- 0 0.465 0.710 307 487 0.857
1965 1 -- 0 0.490 0.132 456 652 0.667
1966 1 -- 0 0.514 1.224 575 779 0.505
1967 1 -- 0 0.538 1.406 1160 1440 0.078
1968 1 -- 0 0.562 1.977 363 498 0.846
1969 1 -- 0 0.587 1.594 508 646 0.676
1970 1 -- 0 0.611 1.687 654 794 0.489
1971 1 -- 0 0.624 0.372 714 850 0.424
1972 1 -- 0 0.637 1.299 1510 1710 0.043
1973 1 -- 0 0.650 1.239 619 722 0.575
1974 1 -- 0 0.663 1.041 648 744 0.548
1975 1 -- 0 0.676 0.894 848 946 0.313
1976 1 -- 0 0.689 1.188 1110 1210 0.152
1977 0 -- 4001 0.702 0.950 365 -- --
1978 0 -- 4001 0.715 1.458 1180 -- --
1979 0 -- 4001 0.728 0.676 1740 -- --