Abstract
We have tried to evaluate the abilities of vegetation to be of benefit to the human environment in a small model suburban forested area . The following questionniarings were conducted on 38 persons who were well informed of the model area, TOYOTA Foresta Hills, 76 ha, near Toyota City, Aichi Pref.;(1)selecting benefits (vegetational functions) to be evaluated, (2)giving the grade on the relative importance to each benefit selected, (3)giving a vegetation type its grade of contribution to each benefit, answerer's knowledge (selfconfidence). E Relative importance of each benefit in this site was decided as the mean value of (2)weighted by (4) .(6) Relative contribution point to each benefit by vegetation type in this site was calcurated to be the mean value of O weighted by (4). The total amount of vegetational contribution in this forested areawas evaluated in terms of the sum of [(6)×(5)× total area per vegetation type]. The evaluated values in every 50m×50m square were calculated and shown horizontally on the meshed map. This method may be useful to the environmental impact assessment recently provided for in the law.
