POINTS OF CONTACT - doern10007

Technical Note DOER-N1

April 1998

Now that the maximum bottom shear stress due to both currents and waves is known, erosion rates

can be estimated as described in Equation 1.

WES is involved in several projects where the improved LTFATE model is being applied. These

projects include erosion rate parameter information from the high shear stress flume for better

quantification of the vertical variation of erosion. A future TN will provide details on the results of

these projects. These applications will be relevant to site management concerns.

POINTS OF CONTACT: For additional information on LTFATE, contact the author of this TN,

Dr. Joseph Gailani (601-634-4851, j.gailani@cerc.wes.army.mil) or the DOER Program Managers,

Mr. E. Clark McNair, Jr. (601-634-2070, mcnairc@ex1.wes.army.mil) and Dr. Robert M. Engler

(601-634-3624, englerr@ex1.wes.army.mil). This technical note should be cited as follows:

U.S. Army Engineer Waterways Experiment Station. (1998). "LTFATE cohesive

sediment transport model," Technical Note DOER-N1, Vicksburg, MS.

REFERENCES

Christoffersen, J. B., and Jonsson, I. G. (1985). "Bed friction and dissipation in a combined current and wave motion,"

Ocean Engng 12(5), 387-423.

Grant, W. D., and Madsen, O. S. (1979). "Combined wave and current interaction with a rough bottom," J. Geophys.

Res. 84(C4), 1797-1808.

Lavelle, J. W., Mofjeld, H. O., and Baker, E. T. (1984). "An in situ erosion rate for a fine-grained marine sediment,"

J. Geophys. Res. 89(C4), 6543-6552.

Scheffner, N. W. (1996). "Systematic analysis of long-term fate of disposed dredged material," J. Waterways, Harbors

and Coastal Eng. Div. Am. Soc. Civ. Eng. 122(3), 127-133.

Scheffner, N. W., Thevenot, M. M., Tallent, J. R., and Mason, J. M. (1995). "LTFATE: A model to investigate the

long-term stability of dredged material disposal sites," Technical Report DRP-95-1, U.S. Army Engineer Water-

ways Experiment Station, Vicksburg, MS.