In this exercise, you will divide the site up into catchment areas by building a watershed model and importing the watershed boundaries.
On the Terrain menu, click Terrain Model Explorer to display the Terrain Model Explorer dialog box.
Select Area1c and expand its TIN data tree. Select Watershed, and then right-click and click Calculate Watershed to display the Watershed Parameters dialog box.
Enter 1 m for the Minimum Depression Depth and 50 sq. m for the Minimum Depression Area, and then clear the Must exceed both minimum area and minimum depth check box.
Click OK to display the Calculate Watershed dialog box, and then click OK as the Done calculating watershed message is displayed.
Information regarding the watershed areas is displayed in the right pane of the Terrain Model Explorer.
Use the following steps to import the watershed boundaries into the drawing.
Select Watershed, and then right-click and click Import Watershed Boundaries to display the Watershed Display Settings dialog box.
Accept all of the default values that are displayed in this dialog box by clicking OK.
Close the Terrain Model Explorer and view the watershed boundaries.
Click here to see an illustration of the watershed boundaries.
Zoom in so you can see the watershed numbers that were inserted.
Click here to see an illustration of the watershed numbers.
This concludes the surface visualization lesson. In the next lesson, you'll learn about calculating volumes.