FOREST HARVEST SCHEDULING PLAN INTEGRATED TO THE ROAD NETWORK

作者：Belavenutti Pedro Henrique^*; da Silva Martins; Arce Julio Eduardo; Loch Gustavo Valentim; David Hassan Camil; Fiorentin Luan Demarco

来源：Cerne, 2016, 22(1): 69-75.

DOI：10.1590/01047760201622012096

• Forest management
• Integer linear programming
• Road maintenance cost
• Spatial constraints

In industrial forest plantations, the spatial distribution of management units for harvest scheduling influences the timber production cost and the non-renewable resources consumption, due to issues related to transport logistic. In this context, this research aimed to formulate Integer Linear Programming (ILP) by means of the application of Floyd-Warshall network optimization algorithm to generate timber production routes, minimizing the production costs resulting from harvest activities and forest road maintenance. Then, scenarios were simulated considering different minimal harvest ages for Pinus spp. and Eucalyptus spp. stands. The planning horizon was five years with annual periodicity. The study area was 23,330 hectares of forests, located in Parana state (southern Brazil). We compared the simulated scenarios according to the following parameter indicators: harvest income, building road network and the production unit cost. The decreasing of the minimal harvest age reduces the mean production of management units scheduled to be harvested, in other hand, it requires fewer roads to be built, and consequently increases the production unit cost. The solutions obtained by using ILP models presented an optimality gap lower than 0.1%.

• 出版日期2016-3