WET is an open source QGIS plugin for application and user adaptation of aquatic ecosystem models. The WET installer and the WET source code is available through Gitlab:

To download the installer or the source code, you first need to set up a (free) Gitlab account. Please read the download instructions and watch the associated video tutorial on how to download the software.


FABM-PCLake is the aquatic ecosystem engine of WET, and describes interactions between multiple trophic levels, including piscivorous, zooplanktivorous and benthivorous fish, zooplankton, zoobenthos, phytoplankton and rooted macrophytes. The ecosystem model also accounts for oxygen dynamics and a fully closed nutrient cycle for nitrogen and phosphorus. An executable of the coupled one-dimensional hydrodynamic-ecosystem model GOTM-FABM-PCLake is part of the WET installation package.

The complete source code for FABM-PCLake is also available through Gitlab:

To download the source code, you first need to set up a (free) Gitlab account. Please read the download instructions for more information.


WET and FABM-PCLake are continuously being developed, to account for new discoveries within aquatic ecosystem functioning, to enable simulations of new relevant management interventions and also for outputting key diagnostics of ecosystem health. The ongoing development of WET and FABM-PCLake is dependent on incoming projects. If you have ideas for further developments these can be posted on the “Issues board” of the Gitlab page of WET and FABM-PCLake, respectively (using the issue label “ideas”).

Examples of potential new developments to WET include:

  • Enhanced use of the various functionalities available in QGIS. For instance allowing users to draw inlets, outlets, monitoring stations on the map canvas and subsequently configuration in the GUI of WET.
  • Incorporation of greater flexibility for the user in configuration of number of inflows/outflows and evaporation calculations.
  • Implementation of sensitivity analysis and auto-calibration tools to support model application and adaptation for a specific aquatic system.
  • Wider flexibility regarding configuration of the core aquatic model where users may choose among different varieties of models already developed and published, which may prove better for a specific system.
  • A feature for analyzing past climate data and processing that to simulate into the near future (e.g., 10-20 years), e.g., for simulating the resilience and temporal response lag of an ecosystem after a management intervention.
  • A feature for exporting a standard report of a WET application (e.g., exporting a standardized pdf report based on the user-adapted WET application).
  • Additional management interventions, including harvesting or transplanting of rooted macrophytes, sediment dredging, oxygenation and mineral dosing of P-binding agents.
  • Functionality within WET to enable selection, download and formatting of ECMWF meteorological time series for any location in the world.

Examples of potential new developments to FABM-PCLake include:

  • Several of the potentially new functionalities of WET, as listed above, will require some further development of the FABM-PCLake model, including, for example, descriptions of processes and state variables involved during dosing of a P-binding agent.
  • A new module for simulating key green-house gas emission dynamics.
  • Explicit behavior of fish (e.g., a new IBM-based fish module).

Related software



  • The General Ocean Turbulence Model (GOTM) is a one-dimensional hydrodynamic model, developed by an international community of scientists. GOTM is open source, and the source code is available through Github: Further information on GOTM is available through


  • The Framework for Aquatic Biogeochemical Models (FABM) enables coupling between several hydrodynamic and biogeochemical models, and was developed by Bolding and Bruggeman ApS. FABM is open source, and the source code and further information is available through Github:


  • Simulations in WET can read output from the QSWAT model, which is an eco-hydrological model that describes processes in a watershed. QSWAT is open source, and is available for download here: