Figure 26. Profiles of zinc and copper concentrations near the Bonnet Carré Spillwaya. Plot of Cu and Zn concentrations for the southwest sector of Lake Pontchartrain, adjacent to the Bonnet Carré Spillway. Data of Flowers and Isphording (1990), Demcheck and others (1996), and other sources. b. Location of station data for above samples. c. Depths for samples along transect A-A’.
The profiles demonstrate strong linkage between Zn and Cu concentrations. Lower metal concentrations occur closer to shore. There is reasonable agreement in the concentrations in among samples analyzed by different laboratories. The lower concentrations near shore are largely attributable to dilution of fine sediments by sand.
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