Observed and urbanization-adjusted annual maximum peak discharge and associated urban fraction and precipitation values at USGS streamgage:
05532500 DES PLAINES RIVER AT RIVERSIDE, 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
1940 1 -- 6772 0.145 0.401 2660 4220 0.623
1941 1 -- 6772 0.153 0.191 3580 5360 0.411
1942 1 -- 6772 0.160 0.729 3320 5010 0.473
1943 1 -- 6772 0.167 0.981 3820 5570 0.377
1944 1 -- 6772 0.175 1.102 4480 6250 0.275
1945 1 -- 6772 0.182 1.355 3670 5330 0.416
1946 1 -- 6772 0.190 0.545 3370 4930 0.486
1947 1 -- 6772 0.197 1.836 3780 5390 0.406
1948 1 -- 6772 0.204 1.840 6510 8500 0.105
1949 1 -- 6772 0.212 1.393 1890 3070 0.832
1950 1 D 6772 0.219 1.318 6340 8190 0.122
1951 1 -- 6772 0.232 0.191 3100 4400 0.589
1952 1 -- 6772 0.245 0.797 3620 4970 0.479
1953 1 -- 6772 0.257 0.624 1470 2450 0.918
1954 1 -- 6772 0.270 1.425 3980 5270 0.428
1955 1 -- 6772 0.283 2.892 6340 7750 0.147
1956 1 -- 6772 0.296 1.227 2460 3440 0.771
1957 1 -- 7142 0.308 1.845 5950 7130 0.184
1958 1 -- 7142 0.321 1.243 2100 2950 0.849
1959 1 -- 7142 0.334 1.180 1680 2460 0.916
1960 1 -- 7311 0.347 0.065 5500 6440 0.249
1961 1 -- 7311 0.355 1.945 4690 5600 0.373
1962 1 -- 7805 0.364 0.251 4230 5080 0.461
1963 1 -- 7805 0.373 1.287 2410 3110 0.826
1964 1 -- 8022 0.382 0.761 2500 3170 0.816
1965 1 -- 8022 0.391 0.311 3200 3860 0.695
1966 1 -- 8022 0.400 1.223 5210 5880 0.326
1967 1 -- 8022 0.409 1.481 4600 5240 0.433
1968 1 -- 8122 0.417 1.123 3600 4150 0.636
1969 1 -- 8162 0.426 0.871 4380 4920 0.489
1970 1 -- 8162 0.435 1.481 4890 5390 0.407
1971 1 -- 8162 0.443 0.436 3380 3830 0.702
1972 1 -- 9062 0.450 1.131 5460 5860 0.329
1973 1 -- 9162 0.457 1.345 4330 4710 0.527
1974 1 -- 9162 0.464 0.587 4290 4640 0.542
1975 1 -- 9162 0.472 0.794 4630 4940 0.485
1976 1 -- 9262 0.479 1.130 4830 5100 0.457
1977 0 -- 14182 0.486 1.114 2170 2590 0.902
1978 2 -- 14312 0.494 1.016 3380 3950 0.676
1979 2 -- 14402 0.501 0.776 5870 6530 0.239
1980 2 -- 14402 0.508 0.676 2960 3450 0.769
1981 2 -- 15057 0.512 1.650 3160 3640 0.736
1982 2 -- 15567 0.517 1.860 3840 4330 0.602
1983 2 -- 16359 0.521 1.571 6130 6680 0.223
1984 2 -- 16458 0.525 0.489 3250 3680 0.729
1985 2 -- 16676 0.529 1.181 6360 6870 0.205
1986 2 -- 17512 0.533 0.702 4180 4610 0.546
1987 2 -- 17512 0.537 2.621 9770 10400 0.052
1988 2 -- 17512 0.541 0.704 3250 3610 0.742
1989 2 -- 17558 0.545 1.268 3720 4070 0.652
1990 2 -- 19713 0.550 1.710 5950 6330 0.262
1991 2 -- 19713 0.553 1.705 5270 5630 0.367
1992 2 -- 20128 0.557 0.792 2760 3050 0.835
1993 2 C 20128 0.560 0.975 4690 5000 0.475
1994 2 C 20234 0.564 0.694 4880 5180 0.444
1995 2 C 20234 0.567 1.118 4720 5000 0.476
1996 2 C 20809 0.571 0.799 5270 5530 0.383
1997 2 C 20809 0.574 2.262 6990 7230 0.180
1998 0 C 30252 0.578 1.372 4450 4770 0.518
1999 3 C 30252 0.581 1.122 5680 6130 0.287
2000 3 C 30252 0.585 1.680 4660 5050 0.466
2001 3 C 30252 0.592 1.760 4040 4360 0.595
2002 3 C 32002 0.600 1.512 6050 6400 0.253
2003 3 C 32002 0.607 1.032 3840 4080 0.650
2004 3 C 32002 0.614 0.740 4780 5020 0.472
2005 3 C 33180 0.622 0.621 3930 4110 0.646
2006 3 C 33180 0.629 0.891 2550 2670 0.892
2007 3 C 34380 0.636 1.322 5790 5920 0.318
2008 3 C 34380 0.644 3.186 9560 9680 0.066
2009 3 C 34380 0.651 0.875 6110 6150 0.284