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W.C. Bridges

A closed basin stormwater retention pond, located 1 mile west of Madison, Florida, has a maximum storage capacity of 134.1 acre-feet at the overtopping altitude of 100.2 feet. The maximum observed altitude (July 1982 to March 1984) was 99.52 feet (126.7 acre-feet) on March 28, 1984. This report provides a technique for simulating net monthly change-in-altitude in response to rainfall and evaporation. A regression equation was developed which relates net monthly change in altitude (dependent variable) to rainfall and evaporation (independent variables). Rainfall frequency curves were developed using a log-Pearson Type III distribution of the annual, January through April, June through August, and July monthly rainfall...
A technique is presented for estimating floods on natural-flow streams in Florida for specific recurrence intervals of 2, 5, 10 , 25, 50, 100, 200, and 500 years. Florida peaks from 159 stream-gaging stations with long-term records (10-53 years) and 23 rainfall-runoff stations with short-term records (7-17 years) were used in a multiple linear regression analysis to develop the regional equations relating peak discharge to basin characteristics. The State is divided into 3 hydrologic regions, A, B, and C. The significant independent variables in Regions A and C were drainage area, channel slope, and lake area. In Region B, the significant independent variables were drainage area and lake area. (USGS)
Annual base flows of streams draining Okaloosa County and adjacent areas in northwest Florida were determined through hydrograph separation and correlation techniques for purposes of evaluating variations in ground-water recharge rates. Base flows were least in the northern part of the county and greatest in the southern part. Topographic and soils data were then superimposed on the distribution of base flow by subbasin to produce a map showing distribution of ground-water recharge throughout the county. The highest recharge rate occurs in the southern part of the county where relatively flat upland areas underlain by excessively drained sandy soils result in minimal storm runoff and evapotranspiration.
Categories: Publication; Types: Citation
Long-term flood records for small basins, especially those basins of less than 10 square miles, are almost nonexistent in Florida. In July 1967 a program was begun to develop a data base to extend short-term flood-peak records for small basins by use of the U.S. Geological Survey rainfall/runoff model. Concurrent rainfall and runoff data, for a 5- to 7-year period, were used to calibrate a model for eight rainfall/runoff gaging stations. The standard error of estimate ranged from 25 to 50 percent. Twenty other rainfall/runoff stations are ready for calibration. The Caney Creek station was calibrated, and the annual peaks simulated for 1902-68 were used as input to develop a flood-frequency curve using a log-Pearson...
Categories: Publication; Types: Citation; Tags: Open-File Report
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