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Real time turbidity, when used as a surrogate to control suspended sediment sampling, can provide accurate estimates of sediment flux. Trace contaminates, such as mercury, and other metals, PCBs, and OC pesticides (DDT, chlordane, and dieldrin) can adsorb to sediment particles and therefore an accurate estimate of sediment flux can provide insight into contaminate loading from urban and industrial discharges, and from river and estuary sediments. |
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Above: Mercury vs. suspended sediment from the Guadalupe River , San Jose , CA. |
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| There are other surrogates, in addition to turbidity, that may be useful for estimating loads (click link here to see the table, Surrogate-estimated loads: Little Arkansas River, Christensen et al., 2000 ). If a suitable sensor is available, for example to measure conductivity, it is possible to automate sample collection with an algorithm that is similar to Turbidity Threshold Sampling. | ||||||
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