In 1990, the US Congress authorized the Corps of Engineers to conduct a comprehensive study to evaluate the reservoir systems within two major river basins in Alabama, Georegia and Florida. The basins are: the Applachicola-Chattahoochee-Flint (ACF) and the Alabama-Coosa-Tallapoosa (ACT). A schematic of the study region is shown in Figure 1. The development of comprehensive reservoir system models requires the development of two types of model data: the reservoir system model and the flow data to be applied to the system. The ACF/ACT basins are "blessed" with many stream gages, with long records of flow data. For this study, flow-data at more than 50 locations were developed for the period 1939 to 1993. Missing records were "filled in" based on flow correlation with observed data, or by transposing gaged data with drainage area adjustments and routing. Reservoir releases were computed based on ratigns for the outlet works and reservoir inflows were computed based on pool levels and reservoir releases. Flow adjustments were made for data errors, initial reservoir filling, net diversions, reservoir evaporation losses and precipitation gains to estiamte average daily, unimpaired flow.
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