Difference between revisions of "Talk:Natural regeneration"
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(New page: How should this model be applied when growth for a shorter period than 5 years is calculated? *Ignore ingrowth? *Adjust weight of ingrown trees, e.g. if the time period is 3 years, then t...) |
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| + | === Problem === | ||
How should this model be applied when growth for a shorter period than 5 years is calculated? | How should this model be applied when growth for a shorter period than 5 years is calculated? | ||
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*Adjust diameter of ingrown trees? How? | *Adjust diameter of ingrown trees? How? | ||
*Adjust diameter and weight? | *Adjust diameter and weight? | ||
| + | |||
| + | === Background === | ||
| + | Interpolation to another time period than 5 years is used in two different ways: | ||
| + | |||
| + | * To estimate values for all years between two 5-year periods. Needed when data is prepared for tactical planning. Here, ingrown trees are ignored during the intermediate years, and added in the last period. E.g. if period 1 = year 5, and period 2 = year 10; then for years 6 to 9 ingrown trees are not included. | ||
| + | * To make prognostics for a time period shorter than 5 years. Needed both for tactial planning export and in RegVis. Here, the issue described above is not solved for the moment. | ||
Revision as of 11:17, 13 August 2008
Problem
How should this model be applied when growth for a shorter period than 5 years is calculated?
- Ignore ingrowth?
- Adjust weight of ingrown trees, e.g. if the time period is 3 years, then the weight of the ingrown trees is multiplied with 3/5?
- Adjust diameter of ingrown trees? How?
- Adjust diameter and weight?
Background
Interpolation to another time period than 5 years is used in two different ways:
- To estimate values for all years between two 5-year periods. Needed when data is prepared for tactical planning. Here, ingrown trees are ignored during the intermediate years, and added in the last period. E.g. if period 1 = year 5, and period 2 = year 10; then for years 6 to 9 ingrown trees are not included.
- To make prognostics for a time period shorter than 5 years. Needed both for tactial planning export and in RegVis. Here, the issue described above is not solved for the moment.