Terrestrial ecosystem and ecohydrological models are of paramount importance for understanding and quantifying the coupled water and carbon cycles. Despite their physics-based modeling approach, several sources of uncertainties affect the robustness of their predictions (e.g., Fisher et al., 2014;Zhou et al., 2018). Uncertainties include epistemic sources due to specific model formulations (e.g., Schwalm et al., 2019) and poorly known model parameters (e.g., Pappas et al., 2013) due to the lack of high fidelity in situ data at commensurate scales. One of the major processes that affects both the water and carbon cycles is the movement of water in the soil. Uncertainties involved in modeling soil water transport may impact key hydrological fluxes, such as runoff generation, groundwater recharge, and evapotranspiration, and, in turn, changes in water content in the root zone may influence vegetation dynamics, especially in areas with limited water availability.Most current generation ecohydrological and terrestrial ecosystem models simulate water movement in soils by solving either the 1-D or the 3-D Richards equation, adopting different numerical schemes (e.g., Farthing &