Graduate Project
 

Aerial forest operations : mineral amendment project

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https://ir.library.oregonstate.edu/concern/graduate_projects/cz30q001h

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  • A helicopter operations problem was studied for a private forest landowner testing an experimental application of minerals on Douglas-fir (Pseudotsuga menziesil) in the Coast Range of Oregon to offset growth reductions from Swiss needle cast disease. A planning approach was needed to minimize costs for transportation and aerial application of the minerals. A transportation network model was developed for a heliport and service landing location facility problem which used mixed-integer linear programming techniques. Cost and production elements were identified along with interactions of significant variables for the operation. An empirical production model estimated application costs. For one type of mineral, five transportation and application options with two types of helicopters, two types of material delivery options and a shared road system were modeled for a simplified field application version (i.e. two application units in the case study). The solution minimized costs for a transportation and aerial application option for a total cost at $39,060, or $212 per ton of applied material, reducing costs on a per-ton basis by approximately 9% over estimates for current operations.
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