iHydroCal

Integrated Hydrological Model Calibration and Uncertainty Analysis

Overview

iHydroCal provides a unified framework for calibration and uncertainty analysis of integrated hydrological models including:

• SWAT (Soil and Water Assessment Tool)
• SWAT+ (SWAT Plus)
• SWAT-MODFLOW (coupled surface-groundwater model)
• APEX-MODFLOW-RT3D-Salt (integrated modeling system)

Features

• 🎯 Unified Calibration Framework: Single interface for multiple model types
• 📊 Uncertainty Analysis: Comprehensive sensitivity and uncertainty quantification
• 🔧 PEST++ Integration: Leverage industry-standard optimization tools
• 🐍 Python-Based: Built on pyemu and flopy
• 📈 Visualization: Built-in plotting and reporting capabilities

Installation

From PyPI (coming soon)

pip install ihydrocal

From conda (coming soon)

conda install -c conda-forge ihydrocal

Development Installation

git clone https://github.com/yourusername/ihydrocal.git
cd ihydrocal
pip install -e .[dev]

Quick Start

import ihydrocal as ihc

# Load configuration
config = ihc.load_config("config.yaml")

# Initialize model
model = ihc.create_model("swat-modflow", config)

# Run calibration
calibrator = ihc.Calibrator(model, config.calibration)
results = calibrator.run()

# Uncertainty analysis
uncertainty = ihc.UncertaintyAnalysis(model, results)
uncertainty.sensitivity_analysis()

Documentation

Full documentation is available at https://ihydrocal.readthedocs.io (coming soon)

Contributing

Contributions are welcome! Please see CONTRIBUTING.md for details.

Citation

If you use iHydroCal in your research, please cite:

@software{ihydrocal,
  author = {Seonggyu Park},
  title = {iHydroCal: Integrated Hydrological Model Calibration and Uncertainty Analysis},
  year = {2026},
  url = {https://github.com/spark-hydro/ihydrocal}
}

License

This project is licensed under the MIT License - see the LICENSE file for details.

Acknowledgments

This project builds upon:

• PEST++ by USGS
• pyemu
• flopy

Contact

• Author: Seonggyu Park
• Email: your.email@example.com
• GitHub: yourusername

### 2. `LICENSE` (MIT License)

MIT License

Copyright (c) 2026 Seonggyu Park

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.