Observed and urbanization-adjusted annual maximum peak discharge and associated urban fraction and precipitation values at USGS streamgage:
05540500 DU PAGE RIVER AT SHOREWOOD, 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
1941 1 -- 1984 0.105 0.553 1730 3280 0.786
1942 1 -- 1984 0.109 1.126 4360 6350 0.211
1943 1 -- 1984 0.112 0.750 2640 4380 0.556
1944 1 -- 1984 0.116 1.456 2220 3840 0.670
1945 1 -- 1984 0.119 1.274 1820 3360 0.772
1946 1 -- 1984 0.122 0.394 3700 5610 0.323
1947 1 -- 1984 0.126 3.089 5200 7330 0.141
1948 1 -- 1984 0.129 2.356 11000 13900 0.015
1949 1 2 1984 0.133 0.761 4500 6400 0.206
1950 1 -- 1984 0.136 1.293 9070 11700 0.026
1951 1 D 1984 0.148 0.333 4230 6040 0.252
1952 1 -- 1984 0.159 1.313 2390 3900 0.657
1953 1 E 1984 0.171 1.606 5100 6930 0.167
1954 1 -- 1984 0.182 1.905 3830 5500 0.340
1955 1 -- 1984 0.194 4.073 12000 14400 0.014
1956 1 -- 1984 0.205 1.016 1880 3170 0.806
1957 1 -- 1984 0.217 3.181 6040 7800 0.113
1958 1 -- 1984 0.228 1.727 2880 4220 0.592
1959 1 -- 1984 0.240 1.374 4360 5780 0.291
1960 1 -- 1984 0.251 2.147 3460 4810 0.468
1961 1 -- 1984 0.264 1.469 4920 6220 0.228
1962 1 -- 1984 0.277 0.310 3960 5240 0.387
1963 1 E 1984 0.290 1.470 1300 2300 0.934
1964 1 E 1984 0.303 2.304 3330 4430 0.544
1965 1 2 1984 0.315 0.226 1750 2720 0.884
1966 1 -- 1984 0.328 1.782 6990 8130 0.096
1967 1 -- 1984 0.341 1.362 3160 4090 0.618
1968 1 -- 1984 0.354 2.195 1760 2620 0.898
1969 1 -- 1984 0.367 0.975 1890 2720 0.884
1970 1 -- 1984 0.380 1.400 2800 3590 0.727
1971 1 -- 3484 0.393 0.298 1940 2690 0.888
1972 0 -- 9312 0.407 2.518 6520 7990 0.103
1973 2 -- 9312 0.421 0.790 3110 4590 0.511
1974 2 -- 9312 0.435 1.077 5440 7370 0.140
1975 2 -- 9312 0.449 1.256 3840 5370 0.364
1976 2 -- 9312 0.463 1.032 4200 5700 0.301
1977 2 E 9542 0.477 1.533 1080 1870 0.963
1978 2 -- 9542 0.490 1.071 3450 4700 0.490
1979 2 -- 9542 0.504 0.284 6100 7740 0.118
1980 2 -- 9542 0.518 0.887 2140 3030 0.831
1981 2 -- 9542 0.524 2.065 5050 6350 0.215
1982 2 -- 9542 0.529 0.359 4600 5820 0.283
1983 2 -- 9542 0.535 2.185 8030 9770 0.049
1984 2 -- 9631 0.541 0.703 3620 4670 0.497
1985 2 -- 9706 0.546 1.058 5760 7060 0.161
1986 2 -- 9706 0.552 0.909 2700 3550 0.734
1987 2 -- 9706 0.557 2.146 4780 5870 0.274
1988 2 D 9706 0.563 1.082 3470 4380 0.555
1989 2 E 9706 0.569 1.392 2120 2840 0.865
1990 2 -- 10051 0.574 1.547 6220 7420 0.138
1991 2 -- 11467 0.581 1.644 4600 5570 0.325
1992 2 E 11709 0.587 1.328 2580 3280 0.786
1993 2 -- 12159 0.593 1.746 3610 4400 0.550
1994 2 C 12159 0.599 0.631 3330 4060 0.624
1995 2 C 12159 0.605 1.217 2730 3380 0.768
1996 2 C 12159 0.612 4.507 17300 19300 0.005
1997 2 C 12224 0.618 2.482 7100 8120 0.097
1998 2 C 12321 0.624 1.313 3470 4100 0.614
1999 2 C 12340 0.630 0.695 4680 5400 0.356
2000 2 C 13738 0.636 1.399 3740 4340 0.562
2001 2 C 14012 0.650 0.622 4240 4830 0.466
2002 2 C 14012 0.663 1.794 5010 5570 0.323
2003 2 C 15164 0.676 1.379 2070 2410 0.926
2004 2 C 15164 0.689 1.290 3840 4210 0.591
2005 2 CE 15164 0.702 1.104 3800 4100 0.614
2006 2 CE 15164 0.715 1.184 1870 2060 0.953
2007 2 C 15164 0.728 1.623 5310 5530 0.331
2008 2 C 15164 0.741 3.460 9440 9650 0.050
2009 2 C 15164 0.754 0.986 7310 7400 0.140