Forest Activity Classification System of Small Watershed Area using GIS (I) : Classification system in case of sub-compartment

概要

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A system to evaluate and classify the forest's activity by each sub-compartment was studied. The forest's function was investigated mainly based on topographical factors. By distinguishing the stands suitable and unsuitable for cutting, based on topography, site class, stand volume and so forth, they could be evaluated by a score evaluation method. As a consequence of doing a cluster analysis of the scores, it was decided that they should be appropriately divided into 3 types such as a timber production function, on the erosion protection function and a watershed protection function. On the other hand, as for the forest function for public health and recreation, a condition was set that people could use the water for recreational use. As a result, the various functions of the forest were divided into 4 types by adding a forest function for public health and recreation. In order to determine which function each sub-compartment belongs to, a system to classify them through the use of a decision tree method, was developed by making the best of use the GIS function. As a consequence of its adoption by the Shibata District Office of the National Forestry Bureau, (to the forests within its jurisdiction) it was confirmed that an evaluation of the forest's functions by each sub-compartment could be rapidly classified.
森林計画学会の論文