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Accueil du site → Doctorat → États-Unis → 1989 → Goal programming for multiobjective forest management : An application to the Rif Cedar Forest of Morocco

University of Minnesota (1989)

Goal programming for multiobjective forest management : An application to the Rif Cedar Forest of Morocco

Hlal, El Aid

Titre : Goal programming for multiobjective forest management : An application to the Rif Cedar Forest of Morocco

Auteur : Hlal, El Aid

Université de soutenance : University of Minnesota

Grade : Doctor of Philosophy (PhD) 1989

Résumé
This study examines the application of goal linear programming techniques to multi-objective forest planning in the Cedar Forest of the Rif mountains of Morocco. A forest management schedule is developed. First, maximum achievement levels for management goals for a selected forest in Morocco are determined using standard linear programming—a single objective model. These target levels are obtained through a direct optimization of management objectives considered separately. Then, goal programming—a multi-objective model is applied to determine optimal solutions for achieving all goals simultaneously. A trade-off analysis between management goals, timber and employment, and their sustainability was based on a cardinal weighting scheme. Solutions, based on some subjective weighting combinations, are provided. All management strategies, to different degrees, reasonably achieved forest management objectives. An extremely irregular forest was converted to a regulated one at the end of the planning horizon. Furthermore, this was achieved in a manner that sustained periodic volume and employment requirements are satisfied. One-way goal programming model formulations revealed more suitable for a higher achievement of management goals in terms of the total production over the planning horizon when the ending forest state is to be consistent with a longer rotation age, but also in stabilizing production over time if this rotation age is shortened. Two-way goal programming model, on the other hand, controlled better the per-period productions only in the case where forest structure at the end of the planning horizon is to be consistent with a longer rotation age.

Mots clés : Applied sciences, Operations research, Biological sciences, Forestry

Accès au document : Proquest Dissertations & Theses

Page publiée le 18 février 2015, mise à jour le 29 décembre 2016