Observed and urbanization-adjusted annual maximum peak discharge and associated urban fraction and precipitation values at USGS streamgage:
05536270 NORTH CREEK NEAR LANSING, 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
1948 1 5 0 0.125 1.849 730 1060 0.049
1949 1 5 0 0.129 0.768 531 794 0.132
1950 1 5 0 0.134 1.151 575 852 0.101
1951 1 5 0 0.145 2.026 649 943 0.072
1952 1 5 0 0.156 0.021 435 646 0.238
1953 1 5 0 0.168 0.615 531 768 0.147
1954 1 5 0 0.179 0.916 623 884 0.090
1955 1 5 0 0.190 3.324 692 965 0.068
1956 1 5 0 0.201 1.423 348 520 0.420
1957 1 5E 0 0.213 2.393 515 717 0.178
1958 1 5 0 0.224 1.101 269 405 0.631
1959 1 5 0 0.235 0.612 328 477 0.492
1960 1 5E 0 0.246 1.053 285 416 0.611
1961 1 5 0 0.256 1.493 305 438 0.568
1962 1 5E 0 0.265 0.242 185 285 0.841
1963 1 5E 0 0.274 1.492 295 417 0.610
1964 1 5E 0 0.283 0.991 121 199 0.941
1965 1 5E 0 0.292 0.896 234 336 0.761
1966 1 5 0 0.302 1.631 540 693 0.193
1967 1 5 0 0.311 1.149 240 337 0.760
1968 1 5 0 0.320 2.114 374 493 0.464
1969 1 5E 0 0.329 0.945 142 213 0.931
1970 1 5E 0 0.338 1.472 244 331 0.769
1971 1 5E 0 0.350 0.924 220 299 0.822
1972 1 5 0 0.361 1.088 266 348 0.741
1973 1 5 0 0.373 0.887 390 486 0.478
1974 1 5 0 0.384 1.296 328 409 0.625
1975 1 5 0 0.396 1.120 340 417 0.609
1976 1 5 0 0.407 1.556 497 586 0.314
1977 1 5E 0 0.418 1.017 238 294 0.828
1978 1 5 0 0.430 1.158 249 302 0.816
1979 1 5 0 0.441 0.803 505 576 0.329