the aim of this study was to determine the optimal cutting cycle in an uneven-aged beech forest in the north of iran. first of all, a logistic growth model was determined for an uneven aged forest. then, the stumpage price was predicted via an autoregressive model. the average stumpage price of beech was derived from actual timber, round wood, fire and pulpwood prices at road side minus the var...

This article gives an overview of the state of the art 3D data acquisition systems (i. e. airborne laser scanning and digital aerial cameras) and the derivation of forestry related information from the derived 3D points clouds. The described examples are focusing on forest area delineation, growing stock and biomass estimation, forest growth assessment, forest road extraction as well as its cha...

T. D. Perkins is Director of Research, and G. T. Adams and S. T. Lawson are Research Ass istants, Proctor Maple Research Center, T he University of Vermont;· P. 0. Box 233, Harvey Road, Underhill Center, VT 05490 USA. P. G. Schaberg is Research Plant Physiologist, Northeastern Experiment Station, USDA Forest Service, Burlington, VT 05402 USA. S. G. McNulty is Program Manager, Southern Global Ch...

—We have developed a tabu search method to optimize the stand level harvest decision over intermediate time frames (10-30 years) within the context of a longer term hierarchical plan. In this paper, we focus on the objective function for our model. We are interested in the trade off between two main issues, one the cost of building roads to access the resource and the other the loss of forest p...

A GIS compiled by the Departmental Government of Santa Cruz, Bolivia offers data that may help to resolve some competing theories of tropical deforestation. The GIS contains many attributes relating to land use at two points in time, 1989 and 1994, and allow us to address questions like: • What has been the impact of past road construction on deforestation and land use? • What impacts might be ...

Once the horizontal alignment of a forest road section between two known locations has been determined by establishing a series of intersection points, the most economic vertical alignment can be identified using heuristic techniques. In a previous research work, Simulated Annealing (SA) was used to locate the optimal vertical alignment for a preselected horizontal alignment, while subject to t...