Package index • hydroSWAT

Preprocessing tools

Functions for preparing SWAT model input data, including climate forcings, parameter files, and TxtInOut inputs.

areal_mean(): Compute areal means of raster data over polygons

pcp2swat_editor(): Generate SWAT Editor-compatible precipitation input files

tmp2swat_editor(): Generate SWAT Editor-compatible temperature input files

pcp2swat(): Update SWAT precipitation input files (`pcp*.pcp`)

tmp2swat(): Update SWAT temperature input files (`tmp*.tmp`)

Project setup and execution

Tools for configuring, initializing, and running SWAT projects, including example datasets and model executables.

download_swat_exe(): Download SWAT executable

get_swat_example(): Write example SWAT TxtInOut files to a local folder

setup_swat(): Configure a SWAT project for simulation

run_swat(): Run SWAT model with or without parameter updates

run_swat_exe(): Run SWAT executable

Parameter management

Functions for retrieving, modifying, and organizing SWAT model parameters, including support for parallel calibration workflows.

get_swat_parameters(): Retrieve SWAT model parameters

change_parameter(): Change a single SWAT model parameter

change_multiple_parameters(): Change multiple SWAT model parameters

split_swat_parameters(): Split SWAT parameters for parallel processing

Multiobjective calibration

Multiobjective calibration tools for SWAT based on the NSGA-II evolutionary algorithm.

create_calibration_project(): Create a SWAT calibration project

calibrate_swat(): Perform multiobjective calibration of a SWAT model with NSGA-II

calculate_objectives(): Compute calibration objectives for the SWAT model

best_compromise_solution(): Select a best-compromise Pareto solution by Euclidean distance

Performance evaluation

Model performance assessment using classical goodness-of-fit metrics and hydrological signatures, including Flow Duration Curve (FDC)–based diagnostics.

evaluate_swat(): Evaluate SWAT model performance

gof_metrics(): Goodness-of-fit (GOF) metrics and FDC-based signatures

fdc_signature(): Flow Duration Curve (FDC) signature

pbias_fdc_midsegment(): Percent bias in the midsegment slope of a Flow Duration Curve (FDC)

pbias_fdc_target_segment(): Percent bias in a Flow Duration Curve (FDC) segment

trmse(): Transformed root mean squared error (TRMSE)

plot_timeseries(): Plot time series of simulated and observed data

plot_mean_annual_cycle(): Plot mean annual cycle by evaluation periods

plot_fdc(): Plot Flow Duration Curve (FDC) by evaluation periods

Output readers

Functions for reading and parsing SWAT output files at different spatial levels (HRU, subbasin, and reach).

get_swat_vars(): Retrieve SWAT output variables

output_rch(): Read SWAT reach output

output_sub(): Read SWAT subbasin output

output_hru(): Read SWAT HRU output

read_pcp(): Read precipitation data from SWAT .pcp files

read_tmp(): Read temperature data from SWAT .tmp files

Output analysis

Tools for aggregating, summarizing, and analyzing SWAT simulation outputs for further interpretation and visualization.

summarize_swat_output(): Summarize SWAT output data

Data

Example datasets bundled with the package for demonstrations, testing, and reproducible vignettes.

example_basin_datasets: Datasets included with the package for demos, vignettes, and tests. Unless otherwise noted, they correspond to the **Huancane River basin (Peru)**.

gridded_climate_netcdfs: Gridded climate NetCDFs (precipitation and temperature)

subs1: Subbasins (sf)

riv1: River network (sf)

swat_txtinout_data: SWAT TxtInOut inputs

qobserved: Observed streamflow (daily)