Observed and urbanization-adjusted annual maximum peak discharge and associated urban fraction and precipitation values at USGS streamgage:
05438300 LAWRENCE CREEK TRIBUTARY NEAR HARVARD, 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
1961 1 -- 0 0.010 0.758 45 45 0.831
1962 1 -- 0 0.010 1.283 70 70 0.634
1963 1 -- 0 0.010 1.343 39 39 0.872
1964 1 4B 0 0.010 0.032 26 26 0.938
1965 1 -- 0 0.010 0.787 48 48 0.809
1966 1 -- 0 0.010 1.463 85 85 0.500
1967 1 -- 0 0.010 1.410 92 92 0.444
1968 1 -- 0 0.010 0.744 35 35 0.895
1969 1 -- 0 0.010 0.779 159 159 0.136
1970 1 -- 0 0.010 0.971 139 139 0.191
1971 1 -- 0 0.010 0.467 103 103 0.369
1972 1 -- 0 0.010 0.560 180 180 0.091
1973 1 -- 0 0.010 0.622 144 144 0.176
1974 1 -- 0 0.010 1.066 63 63 0.692
1975 1 -- 0 0.010 0.032 55 55 0.758
1976 1 -- 0 0.010 1.035 155 155 0.146
1977 1 -- 0 0.010 0.727 35 35 0.895
1978 1 -- 0 0.010 1.450 31 31 0.917
1979 1 -- 0 0.010 1.574 123 123 0.260
1980 1 -- 0 0.010 0.545 175 175 0.098