Observed and urbanization-adjusted annual maximum peak discharge and associated urban fraction and precipitation values at USGS streamgage:
05551050 NORTON CREEK NEAR WAYNE, 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
1957 1 7 0 0.081 2.267 890 1310 0.000
1962 1 -- 0 0.107 0.289 48 105 0.842
1963 1 -- 0 0.112 1.223 33 82 0.928
1964 1 -- 0 0.118 0.683 25 68 0.956
1965 1 2 0 0.124 0.134 43 96 0.881
1966 1 -- 0 0.129 1.366 115 200 0.356
1967 1 -- 0 0.135 1.167 617 876 0.000
1968 1 -- 0 0.141 1.487 85 155 0.587
1969 1 -- 0 0.146 1.274 69 132 0.715
1970 1 -- 0 0.152 1.417 214 334 0.071
1971 1 -- 0 0.155 0.357 122 205 0.334
1972 1 -- 0 0.158 0.562 97 170 0.499
1973 1 -- 0 0.161 1.372 106 183 0.436
1974 1 -- 0 0.164 1.197 102 177 0.467
1975 1 -- 0 0.167 0.036 88 156 0.583
1976 1 -- 0 0.169 1.099 142 228 0.244
1977 1 -- 0 0.172 0.854 35 80 0.932
1978 1 -- 0 0.175 1.357 78 140 0.665
1979 1 -- 0 0.178 0.332 194 300 0.103