SORTIE-ND
Software for spatially-explicit simulation of forest dynamics |
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The Chapman-Richards crown depth and radius relationshipsCrown Depth Parameters| Parameter name | Description |
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| Chapman-Richards Asymptotic Crown Height | The asymptotic crown depth (or length), in m, of the Chapman-Richards crown depth equation. | | Chapman-Richards Crown Height Intercept | The intercept of the Chapman-Richards crown depth equation. This represents the crown depth, in m, of the smallest possible sapling. | | Chapman-Richards Crown Height Shape 1 (b) | The first shape parameter, b, of the Chapman-Richards crown depth equation. | | Chapman-Richards Crown Height Shape 2 (c) | The second shape parameter, c, of the Chapman-Richards crown depth equation. |
Crown Radius Parameters| Parameter name | Description |
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| Chapman-Richards Asymptotic Crown Radius | The asymptotic crown radius, in m, of the Chapman-Richards crown radius equation. | | Chapman-Richards Crown Radius Intercept | The intercept of the Chapman-Richards crown radius equation. This represents the crown radius, in m, of the smallest possible sapling. | | Chapman-Richards Crown Radius Shape 1 (b) | The first shape parameter, b, of the Chapman-Richards crown radius equation. | | Chapman-Richards Crown Radius Shape 2 (c) | The second shape parameter, c, of the Chapman-Richards crown radius equation. |
The Chapman-Richards equation for calculating crown radius is: rad = i + a (1 - e -b * DBH) c where - rad is the crown radius, in meters
- DBH is the tree's DBH, in cm
- i is the Chapman-Richards Crown Radius Intercept parameter, which represents the crown radius of the smallest possible sapling
- a is the Chapman-Richards Asymptotic Crown Radius parameter
- b is the Chapman-Richards Crown Radius Shape 1 (b) parameter
- c is the Chapman-Richards Crown Radius Shape 2 (c) parameter
The Chapman-Richards equation for calculating crown depth is: ch = i + a (1 - e -b * H) c where - ch is the distance from the top to the bottom of the crown cylinder, in meters
- H is the tree's height, in m
- i is the Chapman-Richards Crown Height Intercept parameter, which represents the crown depth of the smallest possible sapling
- a is the Chapman-Richards Asymptotic Crown Height parameter
- b is the Chapman-Richards Crown Height Shape 1 (b) parameter
- c is the Chapman-Richards Crown Height Shape 2 (c) parameter
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