Tutorial for using hydroPSO to calibrate SWAT+

This tutorial shows how to use the hydroPSO R package (version >= 0.6-0) to calibrate and verify SWAT+, and to perform a basic uncertainty analysis. The SWATplus.zip file has the following directories: PSO.in: contains the ParamFiles.txt and ParamRanges.txt files Rfunctions: contains the swat2zoo.R function TxtInOut: stores all the SWAT+ model input files and the executable files for GNU/Linux, macOS, a wrapper for all UNIX-alike OS, and MS Windows. This directory is slightly adapted from: Marinao, R., Zambrano-Bigiarini, M., Baez-Villanueva, O. M., & Muñoz-Neira, R. (2025). Tutorial for using hydroMOPSO to calibrate SWAT+ (0.1). Zenodo. https://doi.org/10.5281/zenodo.17273538.