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Understanding Minimum Drain Inclination (Video)

Learn about how to control the drainage direction within a zone independent of the surrounding surface.

Important: The Minimum Zone Inclination zone property has been renamed to Minimum Drain Inclination in Grading Optimization. This video still refers to Minimum Zone Inclination, though the concepts are still the same.

This video demonstrates:

  • Impacts of the Minimum Drain Inclination property
  • Minimum drain inclination zones and triangle optimization
  • Hydrology direction vector views

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Transcript

In Grading Optimization, you can also cause surface triangles to incline in specific directions for drainage purposes.

In this example, we will be overriding the drain pattern of the surface triangles that are affected by two drain lines.

Notice how surface triangles will respond to the current configuration of two drain lines. We'd like these triangles, however, to incline in a uniform direction. This is achieved by placing a zone encompassing those triangles and enabling the Minimum Drain Inclination property.

Here is a zone and drain lines in a similar configuration. In the Zone Properties dialog, enable Minimum Drain Inclination. Specify the Inclination Direction which is an angle. In this case, it is defined as 240 degrees.

In Grading Optimization, enable Hydrology Direction Vectors and Wireframe Topology on the Visualization Toolbar to observe that the inclination of the triangles in the zone are in a uniform direction at the angle specified.

Disable Hydrology, select Contour Topology, and run the optimization.

Use the Minimum Drain Inclination property to create a zone that overrides existing drain objects, forcing surface triangles to incline in a defined direction.

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