A SWAT+ Model repository (almost) clone.

This repository is (mostly) a clone of the official SWAT+ one available here. A few major differences are:

• We only store source code in the git repository. This means that documentation, compiled executables, and example data are not included. It also means that you will not accidently download a git repo over 1 GB in size when you try to clone it.
• Releases for MacOS, Windows and Linux are all automatically compiled and published in the releases tab (magic!)
• Added option for dynamic model linking (documentation to follow)

We will always try to keep this repostitory as up to date as possible compared to the main SWAT+ code. Pull requests are welcome!

If you feel like recompiling SWAT+ from source yourself (what could possibly go wrong?), you will need CMake. Check the .travis.yml file for an example of how it works on Windows versus Linux/OSX.

SWAT+ (as well as SWAT, and nearly all other hydrological models) do not support dynamic linking at runtime. In other words, if you wanted to connect a SWAT+ model with another model (e.g., an agriculture, landuse, system dynamics, or groundwater model) dynamically, with output from one becoming the input for the other, and vice versa, you had to stop the simulation after a year, rewrite input files, and restart it. Unfortunately, SWAT+ has a lot of internal state variables (such as water balances) that are not saved to output files, nor can be specified in input files...

That is why Dynamic SWAT+ was invented. Run normally, it behaves exactly like SWAT+ (we hope). However, by specifying port and host arguments at runtime, you can now tell SWAT+ to pause after a specific amount of time and exchange data with a different model according to the Tinamït data exchange specification (disclaimer: in progress). When the model is given the signal to continue, simulation will resume exactly where it left off.

For instance, when in the SWAT+ project directory, running

$ SwatPlus 12345 127.0.0.1

will execute SWAT+ in dynamic mode on port 12345 on the local machine.

The AGPL license provided here, naturally, only applies to our original work on DynamicSWAT+ (such as src/CMakeLists.txt, src/tinamit_module.f90 and src/socket.c) and not to the rest of the original SWAT+ code. For information on SWAT+ code licensing, please contact the SWAT+ team directly.