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Product(s): |
Bentley PondPack |
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Version(s): |
08.11.XX.XX |
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Environment: |
N\A |
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Area: |
Modeling |
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Subarea: |
N\A |
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Problem
Can the Trapezoidal pond type be used to model an inclined ditch acting as a pond? What do the length and width offsets represent?
Problem ID#: 70129
Solution
No - the trapezoidal pond type is only used to model a flat-bottomed trapezoid. A sloped ditch cannot be modeled this way; you will need to use the elevation-area or elevation-volume type. You can use an external program or develop a spreadsheet to compute such a curve based on the trapezoid geometry.
The Width Offset is the plan (horizontal) distance between top and bottom rectangular surface areas, measured perpendicular to longest side. It does not matter which side you choose as the offset, as the results will be the same:
The Length Offset is the plan (horizontal) distance between top and bottom rectangular surface areas, measured perpendicular to shortest side. It does not matter which side you choose as the offset, as the results will be the same. See attached diagram.
See Also
How do I model a retention pond?
Using PondMaker