Observed and urbanization-adjusted annual maximum peak discharge and associated urban fraction and precipitation values at USGS streamgage:
05551620 BLACKBERRY CREEK NEAR KANEVILLE, 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 0.041 1.219 384 507 0.580
1962 1 -- 0 0.042 0.300 466 606 0.438
1963 1 -- 0 0.043 1.249 388 511 0.574
1965 1 -- 0 0.046 0.161 536 686 0.348
1966 1 -- 0 0.047 1.381 550 701 0.333
1967 1 -- 0 0.048 1.073 499 642 0.395
1969 1 -- 0 0.050 0.875 306 410 0.717
1970 1 -- 0 0.052 1.458 558 707 0.326
1971 1 -- 0 0.055 0.376 311 413 0.712
1972 1 -- 0 0.059 1.079 352 460 0.646
1973 1 -- 0 0.063 1.469 302 400 0.732
1974 1 -- 0 0.067 1.305 640 788 0.250
1975 1 -- 0 0.070 0.841 345 446 0.665
1976 1 -- 0 0.074 1.103 403 512 0.572
1977 1 -- 0 0.078 1.189 196 268 0.887
1978 1 -- 0 0.082 1.399 576 708 0.326
1979 1 -- 0 0.085 0.349 511 632 0.406