Table F1. Example LTFATE Tidal Input Data File--TIDAL.DAT

Because the LTFATE model requires both tidal elevation and current (U and

V) time series input, harmonic constituents for all three variables must be con-

tained in the data file. This input file can be generated through execution of the

program TIDES.EXE. However, the TIDES.EXE program requires an input

database of harmonic constituents at discrete locations and, through interpola-

tion, generates elevation and current constituents for any desired location into

the appropriate format in the file TIDAL.DAT. The constituent database has

been generated for the east coast, Gulf of Mexico, and Caribbean Sea (West-

erink, Luettich, and Scheffner 1993) and described in DRP Technical Note DRP-

1-13 (Scheffner 1994). Constituent output for a specific location can be

obtained by contacting CHL. The tidal constituent database for the west coast is

currently under development.

If tidal constituent coverage of the area of user interest is not available, tidal

constituent data will have to be obtained from alternate sources; for example,

WES technical reports, the National Oceanic and Atmospheric Administration,

university sources, open literature, etc., or through harmonic analyses of avail-

able or collected elevation and current time series. Adequate data are usually

available, but will have to be located and supplied by the user. An example use

of external data is reported by Scheffner and Tallent (1994). If the user supplies

the necessary data, it must be formatted as shown in Table F1 and should be

named TIDAL.DAT.

Table F1

Example LTFATE Tidal Input Data File--TIDAL.DAT

The second file required for long-term simulation of dredged material mound

movement is a file containing a time series of wave height, period, and direction

named HPDSIM.OUT. This file can either be user supplied or generated intern-

ally by LTFATE and is in the format shown in Table F2. If LTFATE generates

the file, the additional file HPDPRE.OUT is required. The HPDPRE.OUT file

represents the precomputed cross-correlation matrix corresponding to a WIS

station location nearest the mound. The combined LTFATE/HPDPRE.OUT

Appendix F LTFATE Model