CenW Forest Growth Model

CenW is a generic forest growth model that simulates photosynthetic carbon gain, water use and the nitrogen cycle through soil organic matter. The photosynthetic modelling uses a simple, yet physiologically based, description of photosynthesis together with simple assumptions about light interception. With appropriate parameter settings, it can be used for forest or pasture systems.

Calculation of water use is linked to light interception and calculated carbon gain which are linked to water loss calculated with a mechanistic water loss routine and an assumed water use efficiency term that explictly links carbon and water dynamics. Nitrogen turn-over is calculated with a modified version of the CENTURY model, which links organic carbon and nitrogen in soil organic matter pools and the dynamics of carbon and nitrogen in the soil with that in plants.

It is suitable for simulating pasture and forest growth under different climatic and soil conditions, and in response to management changes and climatic changes. It is suitable for simulations of wood-volume growth in forests or milk production in dairy systems, and can follow short-term and long-term carbon balances in plant biomass and soil organic matter. Appropriate times scales range from daily to compare fluxes against observations from eddy-covariance measurements to millenial to follow long-term changes in soil carbon.

The key latest development has been the inclusion of a weed layer that interacts and competes with the tree component. The compiled CenW executable is available for download below. You can also download the full source code (written in Delphi). The newer version is easy to implement, runs in standard Delphi and does not require the specialised add-on routines that were required for earlier versions. Version 4.1.1 is functionally equivalent to version 4.1, but includes an additional routine that adjusts the display to different screen resolutions.

More information about the model, and the full set of equations behind the software, is contained in the Equations documentation below. Use of CenW is conditional on adherence to the Licence agreement below.

Please click to be added to the CenW user list.

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Data and Resources

Additional Info

Field Value
Authors Kirschbaum, Miko
Maintainer Miko Kirschbaum
Last Updated September 5, 2017, 11:38 (NZST)
Created July 19, 2017, 10:58 (NZST)
Publisher Landcare Research NZ Ltd
Publication Year 2017