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USGS OFR 03-346
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Figure 8


Figure 8a. Area exhibiting turbid waters in the fall of the year when there had been no runoff of sediment-rich waters into the rivers. The turbidity results primarily from iron oxyhydroxide floc due to precipitation of ferric compounds as ferrous-rich ground water emerges as river base flow.


Figure 8b. Turbid base flow discharge of Nassawango Creek during extended period of near record low flow (July-September, 1999). Turbidity in Creek is suspended floccules of iron oxyhydroxide.

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