The Soil model, also referred to as soil water model, keeps track of the water flow between different layers in the soil profile and the time-varying water content in each layer (see Fig A.3.2). The main task of the soil water model is to keep track of the amount of soil water available for soil evaporation and crop transpiration at any time during the simulation. The soil water content may also be used by the irrigation module to determine the irrigation demand.
Fig A.3.2 Schematisation of the Soil Water Models. Each model uses a different number of layers
You can chose between three Soil model types:
· FAO 56
· ZIMsched
