The left side of the figure is object
browser, and the right side of the figure is the visualization screen.
When you want to change something
such as geographic data, cell attribute, etc. in the visualization screen, you need to click on the related item in the object browser. When you click on that item, the background color of the item changes to light blue. Such status is de- fined as 'active' here.
While you keep the status of [Man-
ning's roughness coefficient] as , the contour on the grid indicates the value of [Manning's roughness co- efficient].