• Seymour, Robert S.
  
• Mott, Gordon D.
  
• Kleinschmidt, Steven M.
  
• Triantafillou, Peter H.
  
• Keane, Robert
  

A dynamic model of budworm-infested spruce-fir forests is described. The Green Woods Model allows managers and analysts to predict forest composition and structure that result from various harvesting and protection strategies. The forest structure is represented as a distribution of area and volume by age class, species, and forest type. This structure changes through time as the natural process of forest development (growth, budworm-caused growth loss and tree mortality, and regeneration) interact with management strategies (timber harvesting and protection). The model is inherently flexible; the rate and timing of virtually all modeled processes, both natural and management-related, are controlled by the user. Included is an example of how the model can be applied with conventional forest inventory data. The main simulation program is coded in PL-1; auxiliary software in WATFIV is available to assist users in constructing input data and summarizing results.