 Van Genuchten–Gupta model

The Van Genuchten–Gupta model is a mathematical model used to describe the soil water retention curve, which illustrates the relationship between soil water content and soil water potential (or matric potential). This model is an extension of the original Van Genuchten equation and incorporates additional parameters to better fit certain types of soils and their hydraulic properties. ### Key Components 1. **Soil Water Retention Curve**: The curve represents how much water a soil can hold at different pressures or potentials.