Observed and urbanization-adjusted annual maximum peak discharge and associated urban fraction and precipitation values at USGS streamgage:
05541750 MAZON RIVER TRIBUTARY NEAR GARDNER, 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
1959 1 -- 0 0.003 0.663 131 131 0.352
1960 1 -- 0 0.003 0.022 118 118 0.418
1961 1 -- 0 0.003 1.340 59 59 0.811
1962 1 -- 0 0.003 0.305 110 110 0.468
1963 1 -- 0 0.003 0.544 90 90 0.612
1964 1 -- 0 0.003 1.195 19 19 0.977
1965 1 -- 0 0.003 0.202 72 72 0.731
1966 1 -- 0 0.003 1.408 119 119 0.413
1967 1 -- 0 0.003 1.054 100 100 0.537
1968 1 -- 0 0.003 1.954 163 163 0.219
1969 1 -- 0 0.003 0.380 44 44 0.891
1970 1 -- 0 0.003 1.641 132 132 0.347
1971 1 -- 0 0.003 0.893 48 48 0.873
1972 1 -- 0 0.003 0.831 108 108 0.480
1973 1 2 0 0.003 0.977 77 77 0.697
1974 1 -- 0 0.003 1.045 143 143 0.298
1975 1 -- 0 0.003 0.647 125 125 0.381
1976 1 -- 0 0.003 0.549 119 119 0.413
1977 1 -- 0 0.003 1.403 125 125 0.381
1978 1 -- 0 0.003 0.864 122 122 0.396
1979 1 -- 0 0.003 1.254 173 173 0.189
1980 1 -- 0 0.003 0.556 170 170 0.196