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Simple teaching model of forest nitrogen dynamics

Model : besn1
Simile version : 3.1+
Date added : 2003-06-20
Keywords : Nitrogen dynamics ; Basic System Dynamics ;

Description

This is a very simple, generic model of nitrogen dynamics in a forest. It was developed as a teaching model, with very simple flow equations and arbitrary parameter values.

Files

Model file Click on the icon to download the model file. (You will need Simile to examine and run the model. A free evaluation version is available from the products page.) Some browsers may attempt to display the model file, rather than open it in Simile; in this case, use the browser back button to return to this page, and use the context menu (invoked by right-clicking on the link) to save the target file to disk.

besn1.sml

Diagram

Equations

	Compartments:
	canopy: initial value = 0
	harvest: initial value = 0
	litter: initial value = 0
	wood: initial value = 0
	soil: initial value = 0

	Flows:
	flow1 = 0.9*canopy
	flow2 = 50
	flow3 = 0.9*canopy
	flow4 = 0.9*litter
	flow5 = 0.01*wood
	flow6 = 0.5*canopy
	flow7 = 0.5*soil
	flow8 = 0.01*soil
	

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