Observed and urbanization-adjusted annual maximum peak discharge and associated urban fraction and precipitation values at USGS streamgage:
05536335 MIDLOTHIAN CREEK NEAR TINLEY 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
1954 1 -- 0 0.270 1.654 204 379 0.355
1955 1 -- 0 0.294 3.267 481 759 0.032
1956 1 -- 0 0.319 1.372 160 300 0.585
1957 1 -- 0 0.343 2.411 479 732 0.037
1958 1 2 0 0.368 1.397 145 267 0.693
1959 1 2 0 0.392 1.258 195 330 0.493
1960 1 2 0 0.417 0.049 180 301 0.581
1961 1 -- 0 0.428 1.450 282 427 0.237
1962 1 -- 0 0.440 0.300 191 309 0.555
1963 1 -- 0 0.452 1.513 162 268 0.689
1964 1 -- 0 0.464 0.989 65 139 0.965
1965 1 -- 0 0.476 0.890 165 266 0.697
1966 1 -- 0 0.488 1.315 332 469 0.178
1967 1 -- 0 0.499 1.146 205 310 0.552
1968 1 -- 0 0.511 1.462 253 368 0.386
1969 1 -- 0 0.523 0.930 166 255 0.730
1970 1 -- 0 0.535 1.100 298 410 0.270
1971 1 -- 0 0.561 0.309 189 273 0.674
1972 1 -- 0 0.587 1.234 232 317 0.532
1973 1 2 0 0.613 1.310 580 712 0.040
1974 1 -- 0 0.639 1.240 234 303 0.575
1975 1 -- 0 0.665 0.665 279 347 0.447
1976 1 -- 0 0.691 0.915 201 251 0.745
1977 1 -- 0 0.717 1.399 188 229 0.805
1978 1 -- 0 0.743 1.114 280 320 0.522
1979 1 -- 0 0.769 0.847 273 304 0.571