Dr. Ni specializes in groundwater hydrology. He uses numerical models and experimental methods to quantify the effects of aquifer heterogeneity on flow and transport behaviors. Recent research interests include numerical modeling of flow and contaminant transport in porous media and fractured rocks, stochastic approaches for uncertainty analyses and inverse modeling, laboratory and field experiments to characterize hydrogeological properties cross-scale, seawater intrusion, and reactive transport in coastal aquifers. Dr. Ni leads an Arctic joint research aiming to quantify the near-surface positive and negative impacts of mass and energy driven by recent accelerating warming in the Arctic area. The study results are expected to extend international collaboration, enhance the understanding of global warming mechanisms and monitoring technologies, and support the knowledge for Net-Zero actions in Taiwan.