Harmonic tides external forcing option for Add New Data from series The form modifying the external time series for the Harmonic Forcings is shown in Figure 1. This option is different from other external forcing options in that before updating the form (type by typing or paste pasting values) , the user must specify the forcing of an arbitrary number of combinations for of harmonic components from 234 predefined tidal constituents. This is done by from the form in Figure 1 by:
- LMC on Selecting the Add New to to add new series and enable edit to enabling editing for that seriesLMC on Change button
- Selecting the Change button to set the number of constituents.
Figure 1. Harmonic Forcing form.
A After selecting Change a table containing the 234 predefined tidal constituents will appear as shown in In in in Figure 2. The user should then select one or more constituents to be added.
- Using LMC with SHIFT and CTRL will allow the user to select multiple constituents from the table, then click on the right arrow button
to add them - If the names of constituents to be used are already known, the user can type the names in Search box and click on Search and Add Harmonic Constituents
to add them immediately
Figure 2. Harmonic Constituents form.
These constituents may be sorted either by angular speed (degrees/hours) or period (days, hours, minutes, seconds) with the drop-down list View Constituents By.
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Once finished adding constituents, the data for phase and amplitude for each tidal constituent needs to be filled ( entered as shown in Figure 3 ). EFDC will vary the final (i.e. applied) phase and amplitude for each tidal constituent using the specified method and values. The Plot button can be use to see tidal time-series plot.
Figure 3. Add data for constituents .