The ecology of the Apalachicola The ecology of the Apalachicola Bay system : an estuarine profile ecologyofapalach00livi Year: [1984] west Florida and the semidiurnal tides on the Gulf peninsula. Tides at Aoalachicola are diurnal to semidiurnal, with 'uncertainties' concerninq the selection of a 'typical' tide pattern for each month (Conner et al. I'^Sl). Tides in the Apalachicola estuary are influenced by the main entrances and smaller passes. Tidal ranqes vary from m (0.^3 ft) at Doq Island near the eastern end of the estuary to m ( ft) at East Pass. Gorsline (1963) classified
The ecology of the Apalachicola The ecology of the Apalachicola Bay system : an estuarine profile ecologyofapalach00livi Year: [1984] west Florida and the semidiurnal tides on the Gulf peninsula. Tides at Aoalachicola are diurnal to semidiurnal, with 'uncertainties' concerninq the selection of a 'typical' tide pattern for each month (Conner et al. I'^Sl). Tides in the Apalachicola estuary are influenced by the main entrances and smaller passes. Tidal ranqes vary from m (0.^3 ft) at Doq Island near the eastern end of the estuary to m ( ft) at East Pass. Gorsline (1963) classified this estuary as 'unsymmetrical and semidiurnal except durinq periods of stronq wind effect.' While currents in the Apalachicola estuary are tide-dominated, they are also dependent on local physioqraphic conditions and wind soeed and direction (Livinqston 1<578). River discharqe has little influence on the hydrodynamics of the partially stratified estuary (Conner et al. 1°81). Shallow estuaries such as the Apalachicola are wind dominated in terms of flushing and current movement. The wind can be up to three times more important than the tidal input in the determination of current strength and direction (Conner et al. 1981). Net flows tend to move to the west from St. George Sound; East Ray water merqes with the westward flow (Fiqure 11). West Pass appears to be a maior outlet for the discharge of estuarine water to the Gulf, especially when influenced by long- term or high velocity winds from the east. Water movement through Indian Pass also occurs in a net westward direction, although the Picoline Bar may retard passage (Dawson 1955). Estuarine currents Figure 11. Net water current patterns in the Apalachicola estuary as indicated by flow models developed by B. A. Christensen and colleagues. (A detailed analysis of such currents can be found in Conner et al. (1981).) may be affected by excessive land runoff or high velocity winds from the east or west. Strong north to no
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