Observed and urbanization-adjusted annual maximum peak discharge and associated urban fraction and precipitation values at USGS streamgage:
05530700 SILVER CREEK AT MELROSE PARK, 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 0.651 3.353 547 682 0.145
1961 1 -- 0 0.776 2.004 589 656 0.164
1962 1 -- 0 0.781 1.978 262 306 0.821
1963 1 -- 0 0.787 1.588 309 353 0.721
1964 1 -- 0 0.792 1.898 524 576 0.238
1965 1 -- 0 0.798 0.495 586 639 0.177
1966 1 -- 0 0.804 1.894 356 395 0.613
1967 1 -- 0 0.809 2.070 372 409 0.579
1968 1 2 0 0.815 2.086 600 644 0.173
1969 1 -- 0 0.820 0.807 560 599 0.211
1970 1 -- 0 0.826 1.039 317 345 0.738
1971 1 -- 0 0.828 1.205 378 407 0.584
1972 1 -- 0 0.830 1.292 752 795 0.080
1973 1 -- 0 0.832 0.482 459 490 0.408
1974 1 -- 0 0.834 0.756 347 372 0.674
1975 1 -- 0 0.837 1.385 499 528 0.317
1976 1 -- 0 0.839 1.693 308 330 0.769
1977 1 -- 0 0.841 0.349 434 459 0.471
1978 1 -- 0 0.843 1.899 496 522 0.332
1979 1 -- 0 0.845 1.135 511 536 0.300
1980 1 -- 0 0.847 0.676 450 473 0.443