SMA: Biological Data

Module for inputting biological data for the simulator. This version is customized for the stand simulator by Kellomäki et al. 1991.

Forest input file: This lets the user identify an input file for the initial stand structure. This feature is often needed by a stand simulator. The button [Read forest file] opens a list of files to choose from. The files should have the tag ".met".
Climate file: The climate file sets the climate parameters. This is also specific to the simulator by Kellomäki et al. 1991.The button [Read climate file] opens a list of files to choose from. The files should have the tag ".ymp".
Number of scenarios: The number is scenarios is required for the stochastic stand developments and (if specified) the stochastic prices. Serious analyses require up to 100 scenarios and then computations will be severely slowed down.
Seed for random numbers: The random number seed is used by the (pseudo) random number generator. By rerunning analyses with other seeds, the user can see how dependent the results are on the particular set of realizations of stochastic processes used in a run.
Round wood prices: Round wood prices can be made stochastic by activating stochasticity by clicking the square on the left. The slider is used to input percentage standard deviation of yearly prices. The underlying price model is of AR(1) type.
Natural regeneration: Simulating natural regeneration can be turned on/off be clicking the square on the left. Turning natural regeneration of improves the optimization process.