Observed and urbanization-adjusted annual maximum peak discharge and associated urban fraction and precipitation values at USGS streamgage:
05531000 SALT CREEK NEAR ARLINGTON HEIGHTS, 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
1951 1 2 0 0.243 0.421 350 671 0.406
1952 1 -- 0 0.264 0.862 430 763 0.276
1953 1 -- 0 0.285 0.759 139 342 0.912
1954 1 -- 0 0.306 1.947 540 889 0.171
1955 1 -- 0 0.327 3.645 516 838 0.199
1956 1 -- 0 0.348 1.301 188 387 0.857
1957 1 -- 0 0.369 3.449 572 889 0.171
1958 1 -- 0 0.390 0.769 200 388 0.857
1959 1 2 0 0.411 0.402 350 576 0.555
1960 1 -- 0 0.432 0.394 721 1050 0.097
1961 1 -- 0 0.458 1.618 551 798 0.235
1962 1 2 0 0.484 0.219 385 582 0.545
1963 1 -- 0 0.509 1.525 200 344 0.912
1964 1 -- 0 0.535 0.616 210 346 0.910
1965 1 -- 0 0.560 0.534 294 432 0.795
1966 1 -- 0 0.586 0.476 410 555 0.590
1967 1 -- 0 0.611 1.376 1060 1290 0.045
1968 1 -- 0 0.637 2.520 396 511 0.668
1969 1 -- 0 0.662 1.819 388 488 0.709
1970 1 -- 0 0.688 1.989 731 847 0.196
1971 1 -- 0 0.699 0.377 427 510 0.669
1972 1 2 0 0.711 1.396 1060 1190 0.059
1973 1 -- 0 0.722 1.477 712 801 0.233
1974 1 2 0 0.734 1.032 550 624 0.481
1975 1 2 0 0.745 0.810 927 1020 0.111
1976 1 2 0 0.757 1.362 745 811 0.225