Observed and urbanization-adjusted annual maximum peak discharge and associated urban fraction and precipitation values at USGS streamgage:
05438390 PISCASAW CREEK BELOW MOKELER CREEK NR CAPRON, 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
1970 1 -- 0 0.043 0.988 1750 1930 0.493
1971 1 -- 0 0.044 0.477 2750 2980 0.202
1972 1 -- 0 0.044 1.203 2020 2210 0.394
1973 1 -- 0 0.045 1.795 4000 4310 0.070
1974 1 -- 0 0.046 0.587 1760 1930 0.492
1975 1 -- 0 0.047 0.032 1530 1690 0.599
1976 1 -- 0 0.048 1.221 2020 2210 0.396
1977 1 -- 0 0.049 0.791 370 433 0.969
1978 1 -- 0 0.050 1.398 1380 1520 0.659
1979 1 -- 0 0.050 0.302 1060 1180 0.787