The PDI model system for parameterizing soil hydraulic properties

The PDI (\"Peters-Durner-Iden\") model system represents a robust framework for parameterizing soil hydraulic properties, i.e. the water retention curve and the hydraulic conductivity curve, across the entire soil moisture spectrum. This model accounts for water retention and hydraulic conductivity in completely and partially-filled pores, including adsorption and film-flow. It was developed in stages and a comprehensive overview of the model development and the model equations is provided in Peters et al. (2024). In this repository, we provide a Python file named “pdi.py” which can be used to compute the various submodels (PDI-VG, PDI-KOS, PDI-FX, ...) of the PDI model system. One MS Excel file is provided for easy access to one PDI model, the PDI-VG. The PYTHON functions contained in \"pdi.py\" can be used to calculate the water retention curve, the unsaturated hydraulic conductivity curve, the specific water capacity function, and the soil water diffusivity function. In addition, we prov..., The dataset consists of the data shown in Figure 3 of the article in Vadose Zone Journal (Peters et al., 2014). This data was measured in the soil physics lab in the Institute of Geoecology at TU Braunschweig, Germany, with the evaporation method using the HYPROP measurement system. The python codes and the Excel spreadsheet were developed by Dr. Sascha C. Iden., , # Data from: The PDI model system for parameterizing soil hydraulic properties

[https://doi.org/10.5061/dryad.z34tmpgnk](https://doi.org/10.5061/dryad.z34tmpgnk)

This dataset consists of the data shown in Figure 3 of Peters et al. (2024, [https://doi.org/10.1002/vzj2.20338](https://doi.org/10.1002/vzj2.20338)), six PYTHON scripts, one MS Excel file, and a short tutorial as pdf file. The main script named \"pdi.py\" provides all models of the PDI model system discussed in Peters et. al. (2024). Five additional PYTHON scripts exemplify the call to the various PDI functions. Notably, \"pdi.py\" incorporates a utility function, 'export_hydrus_materin', which generates an ASCII file named \"MATER.IN\". This file serves as input for simulations with Hydrus-1D and Hydrus-2D3D, offering seamless integration with these simulation platforms. One MS Excel file is provided for easy access to one PDI model, the PDI-VG.

## Description of the data and file structure

The dataset consists of one data file...