Observed and urbanization-adjusted annual maximum peak discharge and associated urban fraction and precipitation values at USGS streamgage:
05549850 FLINT CREEK NEAR FOX RIVER GROVE, 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
1960 1 7 282 0.239 0.481 492 799 0.061
1962 1 -- 282 0.259 0.266 239 431 0.436
1963 1 -- 282 0.270 0.288 170 326 0.691
1964 1 -- 282 0.280 3.171 175 330 0.681
1965 1 -- 282 0.290 0.021 188 345 0.643
1966 1 -- 282 0.300 0.532 260 445 0.405
1967 1 -- 282 0.311 1.244 233 403 0.499
1968 1 -- 282 0.321 3.202 224 385 0.540
1969 1 -- 282 0.331 2.094 286 467 0.358
1970 1 -- 282 0.341 2.425 287 464 0.364
1971 1 -- 282 0.353 0.395 356 542 0.220
1972 1 -- 282 0.365 0.704 238 389 0.532
1973 1 -- 282 0.377 1.808 274 434 0.430
1974 1 -- 282 0.389 1.056 233 373 0.572
1975 1 -- 282 0.401 1.513 221 353 0.622
1976 1 -- 282 0.413 1.682 268 412 0.479
1990 1 -- 282 0.582 2.206 419 517 0.257
1991 1 -- 282 0.588 0.295 305 387 0.537
1992 1 E 282 0.594 0.447 132 190 0.947
1993 1 -- 282 0.599 0.847 305 383 0.548
1994 1 E 282 0.605 0.608 552 658 0.124
1995 1 -- 282 0.611 1.857 451 539 0.226
1996 1 -- 282 0.616 1.981 690 807 0.057