Data for: One Phenomenon, Many Hypotheses in Vadose Zone: Lagrangian Models of Coupled Non-Equilibrium Flow and Transport in 1-D Soil Column

This dataset contains simulation output data used to generate Figures 3–8 in the manuscript. The study compares three coupled flow–transport models for a 1-D unsaturated soil column: PE (Physical Equilibrium, Richards equation + advection–dispersion), SAMP (Subsystems and Moving Packets, Lagrangian particle framework with conductivity-ranked subsystems and interpacket diffusion), and MIPs (Multiple Interacting Pathways, Lagrangian particle framework with moisture-dependent velocity distributions and transition probability matrix). The benchmark experiment is the tritium tracer test from van Genuchten and Wierenga (1977), Experiment 5-2, using a repacked loam soil column (30 cm depth). See README.md for detailed file descriptions and column definitions.