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Automatyzacja waloryzacji funkcji lasu z wykorzystaniem Systemu Informatycznego Lasów Państwowych

Strzeliński P., Chirrek M.

Roczniki Geomatyki

2006

T. 4, z. 3

211-218

The paper presents a system based on a computer programme which enables automation of valuation of forest functions. In the work the valuation system prepared in the Forest Management Department of the Agricultural University in Poznań (in the scope of methodical basis) was used. The method is based on three-step division of forest functions (protective, productive and recreational) and on appraisal of selected values on the level of a stand. For the appraisal a point-weight method of valuation was applied. The automation of forest functions valuation enables relatively fast control of correctness of the applied method under conditions of a concrete object (a forest district) and then verification of selected parameters assessing values and functions of the examined area. The appraisal of individual values consists in working on a great number of input data which has been very time-consuming so far. The use of computer techniques (programme preparing) allowed not only to streamline the process itself but also to eliminate potential mistakes. The programme used data from Computer System of the State Forests (SILP) and enabled preparing basic data for the needs of visualization of a forest numerical map. The programme was prepared and tested with the use of the SILP base and the forest numerical map of the forest district .wieradów. The valuation of forest functions for the forest district .wieradów encompassed 5772 stands. It has been proved that there is a relative balance between groups of functions. The group of recreational functions prevails (37.31% of valuated stands). The group of productive functions has slightly lower value . 36.15%. The group of protective functions has the lowest value . 26.53%. The analysis of the division of stands into degrees of multifunctionality showed that forests close to multifunctional constitute 31.11% and multifunctional forests constitute 30.11% of stands. The domination of the group of recreational functions in the area is justified by the fact that the area is very attractive for tourists, relatively easy accessible, with good tourist infrastructure. It occurred that neither the SILP nor the forest numerical map are sufficient source of data for valuation based on the tested method, although they are functioning flawlessly in the Forest District .wieradów. The assumption accepted in the initial stages was verified (It had been assumed that the system may facilitate introduction of principles of forest functions valuations into forest practice and it may contribute to acceleration of development of this aspect of management works). An efficient valuation system demands both wider data base of stands and corrections in the method of evaluation. There is also a need for standardization of data structure in the bases of the SILP (strict standard of the SILP). Such research directions and implementation works enable to use results of valuation for example to fix forest functions, and as a consequence, to form proper productive and protective recommendations. They may also accelerate research on a multifunctional forest model.