Dataset for Hydraulic Modeling of Newtonian and Non-Newtonian Debris Flows in an Alluvial Fan: Amoray Gully, Peruvian Andes

This dataset supports the research article “Hydraulic Modeling of Newtonian and Non-Newtonian Debris Flows in Alluvial Fans: A Case Study in the Peruvian Andes”. It provides a complete and reproducible dataset for hydrological analysis, rheological characterization, and 2D hydraulic modeling of debris flows in the Amoray Gully watershed (Apurímac, Peru).
The dataset is organized into four main folders:
1. Hydrology:
This folder includes the HEC-HMS project files, watershed delineation data (QGIS), and processed rainfall datasets. It contains maximum 24-hour precipitation records (1996–2020) from SENAMHI stations (Andahuaylas, Tambobamba, and Chalhuanca), as well as design storm estimations for multiple return periods (2–500 years) and resulting hydrographs generated using the SCS-CN method.
2. Soil testing:
This folder contains geotechnical field and laboratory data, including granulometric test results and soil classification (USCS) obtained from three test pits. These data were used to estimate rheological parameters such as yield stress and dynamic viscosity for non-Newtonian flow modeling.
3. Hydraulics:
This folder includes the complete HEC-RAS 6.6 2D model, terrain data (high-resolution DEM derived from RTK drone photogrammetry), Manning roughness coefficients (shapefile), and projection files. It also contains simulation outputs for both Newtonian and non-Newtonian scenarios, including flow depth, velocity, and flood extent for different return periods.
4. Hydraulic design (HY-8):
This folder provides the culvert design files generated in HY-8 software, including the .hy8 project file and supporting figures. The design corresponds to a multi-barrel circular culvert developed based on the 50-year return period discharge to mitigate debris flow impacts on road infrastructure.

Hydraulic simulations were performed using HEC-RAS 6.6 in 2D mode, incorporating rheological parameters derived from empirical models and calibrated using field evidence from a debris flow event recorded in 2021 (INDECI reports). The dataset includes comparative results demonstrating differences between Newtonian and non-Newtonian approaches in terms of flow depth, velocity, and inundation extent.
This dataset enables full reproducibility of the modeling workflow presented in the associated article and can be used for further research in debris flow modeling, hydrological analysis, and resilient hydraulic infrastructure design in mountainous environments.