Observed and urbanization-adjusted annual maximum peak discharge and associated urban fraction and precipitation values at USGS streamgage:
05526500 TERRY CREEK NEAR CUSTER 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
1950 1 -- 0 0.000 1.112 162 173 0.483
1951 1 -- 0 0.000 0.407 152 162 0.530
1952 1 -- 0 0.000 1.236 125 134 0.656
1953 1 -- 0 0.000 1.205 150 160 0.540
1954 1 -- 0 0.000 1.867 112 120 0.715
1955 1 -- 0 0.000 2.252 71 77 0.877
1956 1 -- 0 0.000 0.436 154 164 0.520
1957 1 -- 0 0.001 3.636 545 569 0.021
1958 1 -- 0 0.001 1.195 285 300 0.152
1959 1 2 0 0.001 0.883 140 149 0.592
1960 1 -- 0 0.001 0.974 155 165 0.515
1961 1 -- 0 0.001 1.177 101 109 0.763
1962 1 -- 0 0.001 0.268 81 88 0.840
1963 1 2 0 0.001 0.220 110 118 0.724
1964 1 -- 0 0.001 1.179 20 22 0.990
1965 1 -- 0 0.001 1.038 90 97 0.806
1966 1 -- 0 0.001 1.481 162 172 0.483
1967 1 -- 0 0.001 0.529 140 149 0.593
1968 1 -- 0 0.001 2.135 230 243 0.258
1969 1 -- 0 0.001 0.435 93 100 0.794
1970 1 -- 0 0.001 1.872 1710 1770 0.000
1971 1 -- 0 0.002 0.371 97 104 0.779
1972 1 -- 0 0.002 0.888 132 141 0.628
1973 1 -- 0 0.003 0.822 269 283 0.176
1974 1 -- 0 0.003 0.610 469 490 0.035
1975 1 -- 0 0.003 1.426 237 250 0.242