Conceptual and Parametric Representation of Soil Hydraulic Properties: A Review

摘要: The water retention curve (WRC) and the hydraulic conductivity function (HCF) are key ingredients in most analytical numerical models for flow transport unsaturated porous media. Despite their formal derivation a representative elementary volume (REV) of soil complex pore spaces, these two functions rooted pore-scale capillarity viscous flows that, turn, invoked to provide interpretation measurements processes, such as linking WRC with more difficult measure HCF. Numerous conceptual parametric were proposed representation processes within spaces inferences concerning (WRC HCF) from surrogate variables. We review some primary highlight physical basis, assumptions, advantages, limitations. first part focuses on modeling WRC, including recent advances angular pores film adsorption present empirical based easy properties (pedotransfer functions). In second part, we HCF focus widely used that use information predict saturated conductivity. third briefly issues related parameter equivalence between models, hysteresis effects structural changes functions. Recent technological monitoring networks offer opportunities extensive hydrological high quality. increase measurement capabilities highlights urgent need building hierarchy parameters model structures suitable different objectives predictions across spatial scales. Additionally, commonly assumed links must be reevaluated involve direct through structured special media may require reflecting modifications governing equations. Finally, impact dynamics transient at fluid interfaces regimes necessitate strategies beyond REV-based framework.