Study of capillary hysteresis inmedium texture soil using Preisach model

Abstract

The purpose of this paperis to studythe physical properties of the soil using a phenomenological model which should be able to describe the capillary hysteresis of water from pores of the medium-textured soil.The proposed model is Preisach typeand has been used successfully to describe the hysteresis of nonlinear phenomena in physics, biology or economics. This model has the advantage ofbeingeasily adapted. We had expanded this model to study the pressure exerted by water in the processes of drying and wetting of the soil. The developed and implemented model, unlike other models, takesintoconsideration the way in which interconnected pores are filled and emptied.Our study presents a new method of assessing the water circulation in soil pores with medium texture from greenhouses. The results are useful to make the irrigation systems used in gardening more efficient, from economicalpoint of view.