Observed and urbanization-adjusted annual maximum peak discharge and associated urban fraction and precipitation values at USGS streamgage:
05528470 BUFFALO CREEK AT LONG GROVE, 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 0.192 1.220 102 335 0.879
1962 1 -- 0 0.207 0.262 204 496 0.548
1963 1 4B 0 0.222 0.087 55 239 0.967
1964 1 2 0 0.237 0.672 118 348 0.854
1965 1 -- 0 0.252 0.087 152 397 0.764
1966 1 -- 0 0.267 0.483 204 472 0.603
1967 1 -- 0 0.282 1.278 340 666 0.235
1968 1 -- 0 0.297 1.475 126 344 0.861
1969 1 -- 0 0.312 1.430 221 481 0.581
1970 1 -- 0 0.327 1.618 403 740 0.170
1971 1 -- 0 0.359 0.413 227 472 0.602
1972 1 -- 0 0.390 1.242 539 914 0.079
1973 1 -- 0 0.422 1.379 387 664 0.238
1974 1 -- 0 0.454 0.664 264 487 0.568
1975 1 -- 0 0.485 0.901 296 519 0.503
1976 1 -- 0 0.517 1.307 426 667 0.235