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RENO: A Computerized Solution Procedure and Decision Support System for Forest Biomass Recovery Operations

A computerized decision support system, Residue Evaluation and Network Optimization (RENO) is presented to estimate the optimal mix of methods and equipment for conducting forest biomass recovery operations given a harvest residue assortment, road and landing access and product deliverables. The model was developed using the JAVA platform is able to read spatial data (vector) and simulate the dynamics of the productive system. The problem to be solved is classified as a special case of the multicommodities, multi-facilities problem. The computerized model uses spatial information of the road network and residue pile locations in order to determine travel distances and calculate costs. The solution procedure represents the problem as a network and creates the routes for each residue pile and their processing and transportation costs. At each point of comminution, equipment of different sizes can be used, with different mobilization costs and production costs. Similarly not all trailers types can reach all forest residue locations. In some operations the processing of forest biomass is closely coupled to transportation and others are not. RENO incorporates the use of geographic information systems (GIS), mathematical optimization (mixed integer programming and ant colony heuristics), simulation and economics to support decisions of land owners and forestry managers at the operational level. The simulation model provides support to calculate cost accounting for truck-machine interactions expressed as waiting times.