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Figure 4-13: Sources and Sinks (Head Dependent) sub-menu (for Zone conceptual features).
If the time-varying option is selected, LM click on ‘Transient’ button to open the ‘Transient Data for Lake
Stage’ menu (see Figure 4-14). Indicate the starting data and time with the text boxes next to ‘State Date’
(year, month, day, hour). Then, provide the following inputs for each timestep: TimeN – or the number of
days since the starting date and time; and ValueN – the stage value corresponding to TimeN. The stage
values may be entered in any units; however, if meters are not used, make sure to enter the appropriate
multiplier in the text box next to ‘Multiplier to meter:’. For example, to convert from ft. to m, enter 0.3048,
as 1 ft.=0.3048m. After all desired changes have been made, LM click the ‘OK’ button. Or click ‘Cancel’
to discard all changes and close the sub-menu.
Figure 4-14: Sub-menu for editing transient lake (or other source/sink) stage data.
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