Program files

The matrix is computed from a time series of data corresponding to the location

of interest.

In PC_TIDAL, a database containing the harmonic constituents for tidal ele-

vation and currents for a site-specific location are used to generate an arbitrarily

long sequence of tidal data. PC_TIDAL includes the following two options:

(a) simulation of the long-term tide sequence, and (b) generation of time history

plots for the tide elevation, velocity components, and direction.

Lastly, the program PC_LTFATE automatically accesses data generated by

the programs PC_WAVEFIELD and PC_TIDAL to simulate long-term dredged

material mound movement. These two programs require input files describing

the statistical distribution of a site-specific wave field and tidal harmonic con-

stituents relative to that site. If these data are not available, the user is required

to supply the appropriately named files to substitute for the output files ordi-

narily generated by the programs PC_WAVEFIELD and PC_TIDAL.

The PC_LTFATE program should be employed only after executing pro-

grams PC_WAVEFIELD and PC_TIDAL. PC_LTFATE includes the following

four options: (a) seabed geometry configuration program, (b) simulation of

dredged material mound movement, consolidation, and avalanching, (c) genera-

tion of dredged material mound evolution contour plots, and (d) generation of

dredged material mound evolution cross-sectional plots.

Databases for waves, tides, and storm surge to support LTFATE are available

only for the east and Gulf coasts of the United States. For these applications in

other areas, the user is required to supply time series data for waves and storm

surge (for storm-event applications) or provide tidal elevation and current con-

stituents, and wave time series (for long-term simulations). Therefore, it is

assumed that the user is proficient in the use of a PC, is able to use an editor (if

necessary), and can write simple data construction programs and manipulate

files. These skills are necessary in order to transfer user-supplied data into the

PC and copy it into the appropriate files that are accessed by LTFATE.

Three external user-supplied input files are required by the model to specify

wave, tidal, and storm surge boundary conditions for a specific location of

interest. Site-specific files will have to be obtained (the Coastal and Hydraulics

Laboratory (CHL), WES, can provide these files) or generated by the user in

order to define wave and current boundary condition input corresponding to the

location of interest.

The first of these external files, named TIDAL.DAT, is used to define a time

series tidal elevation and current boundary condition at the subject disposal

mound. The TIDAL.DAT file contains amplitude and epoch harmonic tidal

constituents for both elevation and currents corresponding to the location of the

mound.

Appendix F LTFATE Model