Observed and urbanization-adjusted annual maximum peak discharge and associated urban fraction and precipitation values at USGS streamgage:
05447050 GREEN RIVER TRIBUTARY NEAR OHIO, 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
1959 1 -- 0 0.003 0.738 148 148 0.456
1960 1 -- 0 0.003 1.216 135 135 0.522
1961 1 -- 0 0.003 2.263 23 23 0.982
1962 1 -- 0 0.003 1.025 121 121 0.604
1963 1 -- 0 0.003 0.467 61 61 0.882
1964 1 -- 0 0.003 1.089 150 150 0.447
1965 1 -- 0 0.003 0.807 120 120 0.608
1966 1 -- 0 0.003 1.471 228 228 0.190
1967 1 -- 0 0.003 0.573 115 115 0.632
1968 1 -- 0 0.003 1.522 90 90 0.758
1969 1 -- 0 0.003 1.392 431 431 0.030
1970 1 -- 0 0.003 1.671 115 115 0.632
1971 1 -- 0 0.003 0.388 278 278 0.110
1972 1 -- 0 0.003 0.136 296 296 0.090