Estimation of forestry function by Geographic Information System : Timber production function (TPF) and Water conservation function (WCF) on private forests in SIGA Prefecture

Abstract

This study aims to understand forest function and establish an estimation method depending on regional character. The result of this study is that forest evaluated as high rank is TPF-sugi (cryptomeria japonica ) 37.9%, TPF-hinoki (chamaecyparis obtusa ) 73.6% and WCF 65.5%. This evaluated rank of forest function was depend on soil types and geology types.