The process of abstraction of soil moisture through the root system to allow plant transpiration during photosynthesis is not properly described by terrestrial models, which impairs their ability to predict the effect of hydroclimatic changes on the vegetation and circulation of water in the landscape. By integrating the new formulation of the hydrodynamics of the root system of vegetation into a terrestrial model, this project transforms the approach to this issue on a landscape scale and will allow precise prediction of feedback between hydroclimatic changes and growth dynamics.