Twelve Mile Creek-Lake Hartwell system

The Twelve Mile Creek-Lake Hartwell system in northwest South Carolina provides an excellent opportunity to examine the presence and relative... 

Figure 1. Map of the Twelve Mile Creek-Lake Hartwell system showing sample sites and boundaries of the...

Further studies examining time-variable behavior of PCBs in the Twelve Mile Creek-Lake Hartwell system and sensitivity of model calculations to various system parameters are presently being performed. The steady-state modeling results presented in this chapter, however, provide a reasonable base for an initial assessment of the fate of PCBs in the Twelve Mile Creek-Lake Hartwell system. The cumulative removals of PCBs from the system by volatilization and burial are shown as percents of the total PCB... 

Figure 5 shows a more detailed analysis of variations of homologous chlorine groups with depth in sediment. Again two seemingly different systems are revealed for the lower portion of Twelve Mile Creek and for Lake Hartwell. The Twelve Mile Creek samples (G26 and G33) showed DCB... 

For transport terms in eqs 1 and 3, the upper and lower reaches of Twelve Mile Creek were treated as one-dimensional advective (plug flow) systems. The upper basin of Lake Hartwell was modeled as a series of completely mixed reactors, with inflows into the first reactor from Twelve Mile Creek and the Keowee River. Analytical solutions for steady-state distributions of solids and PCB congeners in the water column and the active sediment layer were determined by using approaches outlined by O Connor (20-22). Because Kd values for a specific congener class were taken to be equivalent for the water column and active sediment layer, the solutions are independent of k[ values. 

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