- Standardsignatur13200
- TitelThe Economically Optimal Amount of Timber Cut in Forests - An Approach by Control Theory : Dissertation, Technische Universität München. Studienfakultät für Forstwissenschaft und Ressourcenmanagement
- Verfasser
- ErscheinungsortFrankfurt am Main
- Verlag
- Erscheinungsjahr2000
- Seiten183 S.
- Illustrationen85 Abb., zahlr. Lit. Ang.
- MaterialBandaufführung
- ISBN3-7939-7024-8
- Datensatznummer126468
- Quelle
- AbstractSearching for the optimal amount of timber to be cut in forests has been a burning issue since the beginning of sustainable forestry. In this study, a model of resource economics, a subdivision of environmental economics, will be used to optimize the yield of other natural resources. In order to make use of the model for the resource of timber, it will be extended and examined on the basis of empirical data from the Bavarian state forest to determine, if it is suitable for forestry. It proves to offer a suitable tool to support decision about stocking and the allowable cut, especially for long-term forest planning. The classical economic claculus developed in forest science to decide on the amount of timber to be cut in forests is basically an investment analysis. A particular area of land is viewed from the planting of a forest stand through harvest and during all subsequent rotations. All receipts and expenditures occurring throughout are related to the present. In forestry, the net present value calculated in this manner is traditionally called "soil expectation value". The method of calculating the soil expectation value was described by Faustmann in 1849; therefore, this model is named "Faustmann model" in this treatise. In size, the net present value depends, among other things, on the selected period of growth time (rotation period) of the forest stand. It is possible to calculate the rotation period in which the net present value reaches the maximum. It was Pressler in 1859 who first presented a suitable optimization method for that purpose. But his approach only describes the situation of more or less even-aged forests. With the tendency to turn away from even-aged forests toward continuously covered, uneven-aged forest stands, it has become increasingly less suitable to provide an accurate picture of reality. The alternative economic calculation presented in this investigation can be traced back to Hotelling (1931). Yet he still applied it only to the exploitation of non-renewable resources. Later, this calculation was extended to apply as well to renewable natural resources and - in the case of deep sea fishing, for example - became a standard model, therefore here it is called "fishery model". This paper is divided into five parts: Ater an introductory section, the model will be developed theoretically in the second chapter; it will be interpreted and discussed in its relation to other approaches of optimization. In chapter 3, functional relationships between the parameters considered in the model will be specified using empirical data. The results obtained from applying the model to forestry will be presented in chapter 4. Finally, in chapter 5, the model will be assessed regarding its suitability for forestry.
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1413031 | 13200 | Zeitschrift | Büchermagazin | Verfügbar |
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