SESOIL (SEasonal SOIL) is a one-dimensional vertical transport screening-level model for the unsaturated (vadose) zone. It simulates contaminant transport and fate based on diffusion, adsorption, volatilization, biodegradation, and hydrolysis.
SESOIL is a public domain software written in FORTRAN developed in 1981 by the United States Environmental Protection Agency (USEPA), written by Bonazountas and Wagner of the Arthur D. Little corporation.
References
SESOIL Wikipedia(Text) CC BY-SA