Articles | Volume 22, issue 3
https://doi.org/10.5194/hess-22-1767-2018
https://doi.org/10.5194/hess-22-1767-2018
Technical note
 | 
12 Mar 2018
Technical note |  | 12 Mar 2018

Technical note: False low turbidity readings from optical probes during high suspended-sediment concentrations

Nicholas Voichick, David J. Topping, and Ronald E. Griffiths

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Short summary
This paper describes instances in the Grand Canyon study area and a laboratory experiment in which very high suspended-sediment concentrations result in incorrectly low turbidity recorded with a commonly used field instrument. If associated with the monitoring of a construction or dredging project, false low turbidity could result in regulators being unaware of environmental damage caused by the actually much higher turbidity.