Assess students' ability to apply advection–dispersion–reaction (ADR) transport models to predict contaminant plume migration and evaluate remediation effectiveness in heterogeneous aquifers. Scope: derive ADR equations with heterogeneous hydraulic conductivity and anisotropic dispersion, choose appropriate reaction terms (sorption, biodegradation, first‑order decay), set boundary/initial conditions, select numerical/ upscaling methods, perform calibration and uncertainty/sensitivity analysis against observational data, and compare remediation scenarios (pump‑and‑treat, permeable reactive barriers, natural attenuation) using model outputs and performance metrics.