Observed and urbanization-adjusted annual maximum peak discharge and associated urban fraction and precipitation values at USGS streamgage:
05540060 KRESS CREEK AT WEST CHICAGO, 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
1961 1 -- 0 0.189 1.297 192 255 0.687
1962 1 -- 0 0.199 0.289 175 234 0.745
1963 1 -- 0 0.208 1.225 131 182 0.862
1964 1 -- 0 0.218 1.654 637 726 0.050
1965 1 -- 0 0.228 0.134 159 209 0.803
1966 1 -- 0 0.237 1.367 356 416 0.287
1967 1 -- 0 0.247 1.168 426 485 0.186
1968 1 -- 0 0.256 1.488 203 249 0.704
1969 1 -- 0 0.266 0.100 150 191 0.844
1970 1 -- 0 0.275 1.418 200 241 0.726
1971 1 -- 0 0.280 0.358 215 255 0.687
1972 1 -- 0 0.284 1.577 278 320 0.507
1973 1 -- 0 0.289 0.753 288 329 0.483
1974 1 -- 0 0.294 1.199 282 321 0.504
1975 1 -- 0 0.298 0.901 361 400 0.320
1976 1 -- 0 0.303 1.100 389 425 0.271
1977 1 -- 0 0.307 1.152 194 226 0.763
1978 1 -- 0 0.312 0.901 407 439 0.246
1979 1 -- 0 0.316 0.878 418 448 0.232
1980 1 -- 0 0.321 0.906 267 297 0.573
1986 1 -- 0 0.331 0.832 425 449 0.231
1987 1 -- 0 0.333 2.139 573 599 0.095
1988 1 -- 0 0.334 0.865 181 206 0.810
1989 1 -- 0 0.336 2.011 180 205 0.813
1990 1 -- 0 0.337 1.366 326 351 0.428
1991 1 -- 0 0.343 0.950 374 396 0.328
1992 0 E 90 0.348 0.407 134 162 0.902
1993 0 -- 540 0.354 1.561 349 398 0.324
1994 2 -- 540 0.359 0.570 369 432 0.257
1995 2 -- 540 0.365 0.972 286 340 0.455
1996 2 -- 540 0.370 2.691 1980 2190 0.000
1997 2 -- 540 0.376 2.231 579 659 0.069
1998 2 -- 540 0.381 1.881 238 281 0.616
1999 2 C 540 0.387 1.401 241 283 0.612
2000 2 CE 540 0.392 1.762 225 263 0.664
2001 2 C 540 0.405 0.741 283 323 0.500
2002 2 C 540 0.419 2.512 446 491 0.181
2003 2 C 540 0.432 2.122 195 220 0.777
2004 2 CD 540 0.445 0.841 160 180 0.868
2005 2 CE 540 0.458 0.741 184 201 0.821
2006 2 CE 540 0.471 2.342 149 162 0.902
2007 2 C 540 0.484 1.971 307 321 0.506
2008 2 C 540 0.497 6.025 2100 2140 0.000
2009 2 C 540 0.510 1.541 448 454 0.225