Figure 3. Combined regression plots, showing differences among lines for different sediments

ERDC TN-DOER-E8

June 2000

Turbidity can be measured in real time, but does not necessarily correlate well with potential

environmental impact. There is no universal correlation of turbidity and suspended solids, but

sediment-specific correlations are useful as a real-time indicator of suspended solids. Such

correlations have often been developed in the laboratory using whole sediment samples. However,

correlations based on whole sediment samples can be inaccurate for dredging applications where

only specific fractions of a sediment are involved, such as for CDF effluent monitoring. This

technical note describes an improved method for developing correlations based on use of a column

settling test in which only the finer fractions of sediment are considered. This approach eliminates

potential inaccuracies in developing the correlations using whole sediment samples. Field data

indicate the improved method is practical and accurate.

POINT OF CONTACT: For additional information, contact Dr. Michael R. Palermo (601-634-

3753, palermm@wes.army.mil) or the Program Manager of the Dredging Operations and Environ-

mental Program, Dr. Robert M. Engler (601-634-3624, englerr@wes.army.mil). This technical note

should be cited as follows:

Thackston, E. L., and Palermo, M. R. (2000). "Improved methods for correlating

turbidity and suspended solids for monitoring," DOER Technical Notes Collection

(ERDC TN-DOER-E8), U.S. Army Engineer Research and Development Center,

Vicksburg, MS. www.wes.army.mil/el/dots/doer