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WaSiM (Richards)

Important: version 10.02.03 and higher provide netCDF support. That requires a few additional libraries (DLLs) to be installed on your system. Please download and install either the lib-package for 32-bit or the lib-package for 64-bit before using WaSiM on Windows and/or download and install the latest netCDF package from the internet. On Linux, you need to install a netCDF package as well (see development details for more information).

Note: WaSiM supports now by default Message Passing Interface (MPI). To use it, you may dowmload the Microsoft MPI-runtime from here: MSMpiSetup.zip
On Linux, you need to install openMPI according to your distribution.


Actual release version (may still be unstable -> it is recommended to always use the latest patch, if one is provided!)

Version 11.00.05(2025-09-28) More »
  • Reading and writing of netCDF grid time-series with time axis
  • Running the routing model in a higher temporal resolution than the main model
  • Full implementation of the ArcVeg model into WaSiM
    • and several bug fixes (see details of model development)
-> older versions More »

Patched versions (stable version only are listed here)

Version 11.00.10 (2025-12-11) More »
  • + added string type for netCDF4 support
  • + writes nc-files with nc extension only
  • ! some major bugs when dealing with daily time steps (mainly lake balances)
  • ! some bugs with snow evaporation balance and others
  • and several bug fixes (see details of model development)
-> older versions More »

Test data set

sample data set (WaSiM input data) More »
contains grids and time series for one year
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WaSiM-News

12/11/2025

new patch availabe:
WaSiM 11.00.10 -> More »

12/11/2025

new SG version with netCDF support available
Installer -> here »