2021 Volume 103 Issue 6 Pages 449-454
We developed a geographic information system (GIS) based simultaneous harvesting selection model, suitable for both coniferous and broadleaved stands, for supply of woody biomass to a power generation plant near Tosayama, Kochi City, Japan. The procedure was developed as follows: 1) the study region was divided into polygons representing watersheds, each of which represented a concave area suitable for harvesting using cable logging systems. 2) Those polygons adjacent to roads wider than 3 m were selected as suitable for log transportation by truck. Those polygons with a smaller area than the fixed logging area designated by the model were removed from the subject area. 3) After additional selection concerning conservation laws, tree species and stand age, the remaining polygons were analyzed for profitability per unit area. 4) The supply potential of both saw timber and fuel wood from the selected polygon area of 947 ha was estimated as 153×103 m3 and 154×103 t, respectively, each of which has a sufficient profit for regeneration.
