The water cycle in Hi-sAFe includes inputs to the scene via rain, snow, irrigation, and a dynamic water table.

The water table is simulated by maintaining voxels below a given depth saturated with water.

Water exports from the scene include soil surface runoff, soil evaporation, natural and artificial drainage, and crop and tree transpiration.

Water competition in the soil is computed by integrating the matrix flux potentials over the whole simulated scene (De Willigen et al, 2000).