Observed and urbanization-adjusted annual maximum peak discharge and associated urban fraction and precipitation values at USGS streamgage:
05529900 WELLER CREEK AT MOUNT PROSPECT, 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 0.926 0.936 444 468 0.627
1962 1 4B 0 0.929 0.372 210 227 0.973
1963 1 -- 0 0.932 1.552 195 210 0.981
1964 1 2 0 0.935 0.455 235 250 0.962
1965 1 -- 0 0.939 0.685 291 306 0.928
1966 1 -- 0 0.942 1.150 821 842 0.123
1967 1 -- 0 0.945 1.540 1160 1180 0.033
1968 1 -- 0 0.949 1.296 627 640 0.290
1969 1 -- 40 0.952 0.835 418 427 0.720
1970 1 -- 40 0.955 1.256 919 931 0.080
1971 1 2 40 0.956 0.372 680 689 0.229
1972 1 -- 40 0.957 1.065 1190 1200 0.031
1973 1 2 140 0.957 0.809 840 849 0.119
1974 1 -- 140 0.958 1.017 444 450 0.670
1975 1 -- 140 0.959 1.008 571 578 0.418
1976 1 -- 140 0.959 0.829 392 397 0.776
1977 1 -- 140 0.960 1.273 266 270 0.953
1979 0 -- 270 0.962 0.877 287 -- --