This example demonstrates how to use the Duration analysis and enter the duration curve manually. To open the analysis editor for this example, either double-click on the analysis labeled Manual Duration Curve Test 14 from the study explorer, or from the Analysis menu select open, then select Manual Duration Curve Test 14 from the list of available analyses. As shown in Figure 1, the "None" data set was selected for this analysis. The Manual Entry tab becomes active when the "None" data set is selected (the Results tab will become inactive).

Figure 1. Duration Analysis Editor for Manual Duration Curve Test 14

The y-axis scale was set to Log while all other default options were selected on the General and Options tabs. Figure 2 shows the Manual Entry tab for Manual Duration Curve Test 14. A variable name of "FLOW" and units of "cfs" were entered as well as the duration curve. The program will plot the duration curve when the Compute button is pressed.

Figure 2. Duration Analysis Editor with Options Tab Shown for Manual Duration Curve Test 14

The duration curve plot can also be opened by pressing the Plot Duration Curve button at the bottom of the analysis window, shown in Figure 3.

Figure 3. Duration Curve Plot for Manual Duration Curve Test 14