Modeling geologically complex volcanic watersheds for integrated water resources management - Dataset

This dataset supports the study titled \"Modeling geologically complex volcanic watersheds for integrated water resources management,\" which presents a transferable and reproducible workflow for developing high-resolution 3D geological models for use in integrated surface–subsurface hydrological simulations. The workflow is demonstrated using the Mt. Fuji catchment in Japan—a region characterized by complex volcanic geology, active tectonics, and increasing stress on groundwater resources. The dataset includes all relevant model input files, exported hydrofacies surfaces, meshing outputs, and scripts used in the study. Specifically, the repository provides: (i) 3D hydrofacies bounding surfaces in raster and DXF format, (ii) the 2D numerical mesh, and all the input configuration files for the HydroGeoSphere model used to run the simulations. These resources are intended to enable the reuse, adaptation, or extension of the modeling framework in similar volcanic or geologically complex regions. The dataset facilitates further work in groundwater resource evaluation, model calibration, scenario analysis, and environmental risk and hazard assessment.