20Q 



100 



:^ 50 



a> 



20 



/ / ■ — 



3/ 



2 .. 



B C 



DOWNSTREAM 



Figure 12. Relation of flood discharge of 

 Oconee River (GA) to distance downstream. 

 (A) = Piedmont station (Greensboro); (B) = 

 fall line station (Milledgeville, drainage 

 3000 mV-) just above the 

 the upper Coastal Plain; 

 station at Dublin; (D) = 

 Ocmulaee (Mt. Vernon, 

 338 km2 or 5150 mi2). 



area 7770 km^ or 

 Oconee swamps in 

 (C) = downstream 

 junction with the 

 13 



drainage area, 

 (1) = 2-year flood, 

 (3) = 10-year flood, 

 (5) = 50-yedr flood, 

 (Wharton 1980.) 



(2) = 5-year flood, 



(4) = 20-year flood, 



(6) = 100-year flood. 



OVERLAND 



RUNOFF 



H7%l 



DEEP GROUND WATER 

 OUTFLOW (2%1 



Figure 13. Diagram of the water budget 

 for Creeping Swamp (NC), July 1974-June 

 1975 (after Winner and Simmons 1977). 



Figure 14. Dotted areas indicate where 

 Tertiary limestones lie at or near the 

 surface, often giving rise to spring-fed 

 streams such as Florida's Chipola, Wa- 

 kulla, Wacissa, and St. Marks and contri- 

 buting heavily to the Suwannee-Santa Fe 

 system. The dashed line is the inner mar- 

 gin of the Coastal Plain. (Adapted from 

 Stringfield and LeGrand 1966.) 



19 



