Observed and urbanization-adjusted annual maximum peak discharge and associated urban fraction and precipitation values at USGS streamgage:
05535000 SKOKIE RIVER AT LAKE FOREST, 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
1952 1 -- 0 0.211 2.300 321 570 0.072
1953 1 E 0 0.225 0.802 92 218 0.797
1954 1 -- 0 0.239 1.530 257 456 0.161
1955 1 -- 0 0.252 0.673 194 364 0.333
1956 1 E 0 0.266 1.418 155 303 0.512
1957 1 E 0 0.280 1.186 201 365 0.327
1958 1 E 0 0.294 0.123 98 214 0.810
1959 1 E 0 0.308 1.801 313 517 0.104
1960 1 -- 0 0.321 0.486 250 416 0.208
1961 1 -- 0 0.341 1.146 155 283 0.580
1962 1 -- 0 0.360 0.211 194 335 0.418
1963 1 E 0 0.379 1.436 161 282 0.585
1964 1 -- 0 0.399 3.027 151 263 0.647
1965 1 -- 0 0.418 0.684 130 232 0.756
1966 1 D 0 0.437 0.583 176 287 0.567
1967 1 -- 0 0.457 1.445 295 430 0.190
1968 1 E 0 0.476 0.380 80 157 0.940
1969 1 -- 0 0.495 2.769 315 443 0.177
1970 1 -- 0 0.515 2.261 249 358 0.348
1971 1 E 0 0.522 0.312 223 325 0.449
1972 1 -- 0 0.529 1.130 367 497 0.123
1973 1 -- 0 0.536 1.572 302 411 0.218
1974 1 -- 0 0.544 1.424 272 374 0.297
1975 1 -- 0 0.551 1.381 185 268 0.632
1976 1 -- 0 0.558 2.181 315 419 0.205
1977 1 E 0 0.565 1.343 70 125 0.970
1978 1 -- 0 0.573 1.976 169 244 0.719
1979 1 -- 0 0.580 1.534 274 366 0.322
1980 1 -- 0 0.587 0.775 175 247 0.708
1981 1 -- 0 0.593 1.636 201 275 0.605
1982 1 -- 0 0.599 3.317 435 550 0.082
1983 1 -- 0 0.604 2.449 394 498 0.122
1984 1 -- 0 0.610 0.482 195 264 0.646
1985 1 -- 0 0.616 0.962 265 345 0.388
1986 1 -- 0 0.621 2.993 492 606 0.057
1987 1 -- 0 0.627 1.158 259 335 0.419
1988 1 -- 0 0.633 0.810 221 288 0.564
1989 1 E 0 0.638 1.290 102 152 0.946
1990 1 -- 0 0.644 2.040 272 344 0.392
1991 1 -- 0 0.653 1.825 276 345 0.387
1992 1 C 0 0.661 2.721 138 187 0.884
1993 1 CD 0 0.670 1.791 294 359 0.343
1994 1 C 0 0.679 1.031 318 381 0.279
1995 1 C 0 0.687 1.633 305 365 0.324
1996 1 C 0 0.696 1.896 460 534 0.092
1997 1 CE 0 0.705 2.522 496 570 0.071
1998 1 C 0 0.713 2.071 246 292 0.551
1999 1 C 0 0.722 1.955 472 536 0.091
2000 1 C 0 0.730 1.928 429 484 0.136
2001 1 C 0 0.744 2.950 392 438 0.184
2002 1 C 0 0.757 3.010 580 634 0.047
2003 1 C 0 0.770 0.757 238 266 0.639
2004 1 C 0 0.783 0.967 267 292 0.549
2005 1 CE 0 0.797 0.693 208 227 0.770
2006 1 C 0 0.810 0.888 277 294 0.543
2007 1 C 0 0.823 1.173 355 370 0.307
2008 1 C 0 0.836 2.837 464 475 0.145
2009 1 C 0 0.850 0.760 412 417 0.211