Evaporation-Driven Density Instabilities in Saturated Porous Media

Soil salinization is a major cause of soil degradation and hampers plant growth. For soils saturated with saline water, the evaporation water induces accumulation salt near top soil. The remaining liquid gets an increasingly larger density due to salt, giving gravitationally unstable situation, where instabilities in form fingers can form. These hence lead net downwards transport salt. We here investigate appearance these through linear stability analysis numerical simulations. gives criteria for onset large range parameters. Simulations using set parameters give information also about development after onset. With this knowledge we predict whether when occur, their effect on concentration boundary.