Observed and urbanization-adjusted annual maximum peak discharge and associated urban fraction and precipitation values at USGS streamgage:
05438500 KISHWAUKEE RIVER AT BELVIDERE, 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 -- 939 0.021 0.653 1330 1680 0.920
1941 1 -- 939 0.021 0.039 2240 2700 0.784
1942 1 -- 939 0.022 0.789 3230 3810 0.602
1943 1 -- 939 0.022 1.176 10300 11600 0.042
1944 1 -- 939 0.022 1.334 9200 10400 0.058
1945 1 -- 939 0.023 0.428 1850 2260 0.849
1946 1 -- 939 0.023 0.625 9830 11100 0.048
1947 1 -- 939 0.023 1.508 2170 2620 0.797
1948 1 -- 939 0.024 1.884 8000 9050 0.085
1949 1 -- 939 0.024 0.349 5750 6550 0.217
1950 1 -- 939 0.024 1.352 5240 6000 0.273
1951 1 -- 939 0.025 0.188 6410 7280 0.167
1952 1 -- 939 0.025 0.569 6690 7580 0.150
1953 1 E 939 0.026 1.461 1850 2250 0.850
1954 1 -- 939 0.026 1.553 3290 3850 0.593
1955 1 E 939 0.027 0.284 2140 2570 0.804
1956 1 E 939 0.028 1.149 935 1200 0.957
1957 1 E 939 0.028 0.916 1070 1360 0.946
1958 1 E 939 0.029 0.193 1270 1590 0.928
1959 1 -- 939 0.029 0.020 3330 3880 0.586
1960 1 -- 939 0.030 0.664 8230 9250 0.079
1961 1 E 939 0.030 0.797 1420 1750 0.911
1962 1 -- 939 0.031 0.312 4600 5280 0.359
1963 1 E 939 0.032 0.152 955 1210 0.956
1964 1 E 939 0.033 0.729 1090 1370 0.945
1965 1 2 939 0.033 0.167 3300 3830 0.597
1966 1 E 939 0.034 0.649 5450 6170 0.255
1967 1 E 939 0.035 1.925 3550 4100 0.542
1968 1 E 939 0.035 1.641 2150 2560 0.807
1969 1 -- 939 0.036 1.742 3640 4200 0.524
1970 1 -- 939 0.037 1.893 2790 3260 0.693
1971 1 E 939 0.038 0.412 8350 9320 0.077
1972 1 -- 939 0.040 0.941 6700 7500 0.155
1973 1 -- 939 0.041 1.599 6270 7020 0.183
1974 1 -- 939 0.042 1.114 6620 7390 0.161
1975 1 E 939 0.044 0.023 3840 4380 0.491
1976 1 -- 939 0.045 1.317 6130 6840 0.194
1977 1 E 939 0.047 0.527 1980 2330 0.839
1978 1 -- 939 0.048 2.156 8340 9230 0.080
1979 1 -- 939 0.049 0.282 9040 9970 0.065
1980 1 E 939 0.051 0.692 2090 2440 0.825
1981 1 E 939 0.052 1.802 1480 1770 0.910
1982 1 -- 939 0.053 0.336 4670 5240 0.363
1983 1 -- 939 0.054 1.743 6470 7150 0.175
1984 1 E 939 0.055 0.726 5070 5650 0.313
1985 1 -- 939 0.056 0.500 3900 4390 0.490
1986 1 -- 939 0.057 0.121 4660 5210 0.368
1987 1 -- 939 0.058 2.172 4590 5120 0.378
1988 1 -- 939 0.059 0.192 3960 4440 0.481
1989 1 E 939 0.061 2.063 1830 2130 0.868
1990 1 -- 939 0.062 0.439 2580 2940 0.750
1991 1 E 939 0.064 1.231 4240 4720 0.436
1992 1 E 939 0.066 1.107 1710 1980 0.887
1993 1 -- 939 0.069 2.063 7870 8560 0.100
1994 1 -- 939 0.071 1.184 11900 12800 0.030
1995 1 E 939 0.073 1.478 2360 2660 0.791
1996 1 -- 939 0.076 1.605 5860 6360 0.235
1997 1 -- 939 0.078 1.694 7620 8220 0.117
1998 1 C 939 0.080 1.686 3570 3920 0.578
1999 1 C 939 0.083 2.013 11400 12200 0.036
2000 1 C 939 0.085 2.169 5730 6170 0.255
2001 1 C 939 0.093 0.658 4040 4370 0.494
2002 1 C 939 0.101 2.287 5040 5370 0.346
2003 1 CE 939 0.108 1.734 896 995 0.970
2004 1 C 939 0.116 1.656 3960 4170 0.529
2005 1 CE 939 0.124 0.716 2610 2750 0.778
2006 1 CE 939 0.131 1.596 1290 1360 0.946
2007 1 C 939 0.139 1.619 7420 7580 0.151
2008 1 C 939 0.147 0.596 4810 4890 0.410
2009 1 C 939 0.154 1.022 4510 4550 0.464