Analytical well hydraulics and boundary physics
Exact and semi-analytical models establish the reference behavior for pumping, Robin-type boundaries, solute diffusion, heat transport, and near-well effects.
Groundwater flux and hydraulic gradients do not always move in step.
Dr. Ying-Fan Lin develops analytical, numerical, and data-supported methods to estimate parameters from non-steady field signals and interpret non-instantaneous hydraulic response. His work begins with analytical well hydraulics and examines cases in which classical interpretations leave timing, amplitude, or residual patterns unresolved. It asks when model choice changes the decision supported by the analysis.
Lagging Theory and asynchronous hydraulic response
Lagging Theory starts from flux-gradient asynchrony, then extends to free-surface drainage, periodic hydraulic-head records, subsidence, and field time series.
Transformation uncertainty
Transformation uncertainty separates measured field response from interpreted parameters and traces how conceptual-model bias enters engineering design decisions.
Groundwater-influenced subsurface energy
TRT, aquifer thermal response, shallow geothermal systems, and industrial water-energy planning become field settings for aquifer-test interpretation and uncertainty propagation.