Methodology for planning log stacking using geotechnology and operations research

CERNE

Lima, Mariana Peres de¹  Martinhago, Adriana Zanella²  Carvalho, Luis Marcelo Tavares de²  Dutra, Gleyce Campos⁴  Oliveira, Luciano Teixeira de²  Carvalho, Samuel de Pádua Chaves e⁵  Oliveira, Thomaz Chaves de Andrade³ 

[1] Universidade Federal de Mato Grosso, Sinop, Brasil$$;Universidade Federal de Lavras, Lavras, Brasil$$;Universidade Estadual de Campinas, Campinas, Brasil$$;Universidade Federal dos Vales do Jequitinhonha e Mucuri, Diamantina, Brasil$$;Universidade de São Paulo, Piracicaba, Brasil$$

关键词: Geographic information system;    linear programming;    log stacking.;   

DOI  :  10.1590/S0104-77602011000300004

来源: Universidade Federal de Lavras-UFLA

【 摘 要 】

In view of the need to improve the planning of timber harvest and transportation, with both activities being the most influential in determining the final cost of timber delivered to the mill yard, this work aims to develop a new methodological proposal using operations research and geotechnology tools in order to determine optimal locations for log stacking and also the amountof timber to be allocated to each selected stack. Analysis was performed using two software applications, geographic information system (GIS) and operations research (OR). GIS spatial analyses were based on layers of the study site, which is a property owned by Votorantim Celulose e Papel, located in the municipality of São José dos Campos, in order to obtain three variables: degree of difficulty in operating forestry equipment, degree of difficulty in log stacking, and distance between log stacks and existing roadways. To obtain these variables, layers containing information on terrain inclination and existing roadways were combined in another analysis named weighted overlay. Results were then filtered and inserted into an operations research environment for maximizationof the timber volume in each selected stack. With results obtained from the geographic information system, 80 potential sites were selected for log stacking. By using operations research, 59 of these sites were ruled out, a 73% reduction in the number of potential sites, with only 21 sites remaining as potentially optimal for log storage. For each of these 21 sites, an optimal amount of timber wasdetermined to be allocated to each one of them.

【 授权许可】

Unknown