Observed and urbanization-adjusted annual maximum peak discharge and associated urban fraction and precipitation values at USGS streamgage:
05531100 MEACHAM CREEK AT MEDINAH, 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
1956 1 -- 0 0.414 1.183 73 124 0.208
1957 1 -- 0 0.452 0.967 51 92 0.514
1958 1 -- 0 0.490 1.412 38 72 0.758
1959 1 -- 0 0.528 0.692 54 90 0.538
1960 1 -- 0 0.565 0.445 87 128 0.192
1961 1 -- 0 0.578 1.466 77 114 0.279
1962 1 -- 0 0.591 0.311 67 102 0.413
1963 1 -- 0 0.603 1.145 35 61 0.870
1964 1 -- 0 0.616 0.779 33 58 0.898
1965 1 -- 0 0.628 0.505 55 83 0.620
1966 1 -- 0 0.641 1.370 98 133 0.170
1967 1 -- 0 0.654 1.456 119 159 0.090
1968 1 -- 0 0.666 1.244 40 62 0.852
1969 1 -- 0 0.679 1.293 64 90 0.540
1970 1 -- 0 0.692 1.323 32 52 0.935
1971 1 2 0 0.713 0.364 39 58 0.892
1972 1 2 0 0.735 1.160 256 304 0.010
1978 1 -- 0 0.865 1.201 56 65 0.823
1979 1 -- 0 0.887 0.781 96 106 0.371