To compute biodiversity critical loads a tool, PROPS-CLF, can be downloaded here (version 1.3, from 2 November 2016, 4.8 MB). The archive PROPS-CLF.zip contains 2 programs:
(1) The interactive PROPSelect tool (to be installed like VSD+) for selecting (and writing to a file) those plants from the PROPS database which are to be used in deriving CLs for a given habitat;
(2) The stand-alone routine PROPS-CLF.exe, which uses that selection plus additional data (SMB-related) to compute the N-S CL function.
For more details read the file '_readme.txt' and the manuals provided for each of the programs.
The VSD suite of models:
The VSD model is the (minimal)
extension of the Simple Mass Balance (SMB) steady-state model into
a dynamic soil (acidificaton) model. A single-site version can be
downloaded here (version from 15 February
2017, 7.3 Mb)
The VSD+ model is an extension of the
VSD model with detailed C and N dynamics. A single-site version can be downloaded here (version from 15
February 2017, 7.2 Mb)
Also available for downloading are four instruction videos for VSD+ studio, on the use of datafiles (7.9 Mb), the calibration (3.5 Mb), interpreting the results (13.9 Mb) and on using the vegetation model (8.2 Mb).
The MetHyd model is a
meteo-hydrological pre-processor for the VSD+ and VSD
models. A single-site version can be downloaded here (version from 13 January
2017, 4.7 Mb)
The GrowUp model is a pre-processor for VSD+ and VSD to compute N and base cation uptake from user specified tree-growth inputs. A single-site version can be downloaded here (version from 1 Nov 2013, 4.9 Mb) [minor bug fixes]
The MS Access database ‘vpvp22.accdb’ applies the models VSD+, PROPS (or Veg), MetHyd and GrowUp to data in the database, and stores the model results. The software should function for access versions from 2007 onwards and under windows XP and windows 7 for 32-bit computers. It can be used to respond to the call for data 2012/2014. We recommend to run the listed models individually for at least one site before applying them through the database. A description on how to use the software can also be dowloaded.
last update 15 February 2017