SiSPAT-Isotope source code to reproduce the results presented in J. Schneider, S. Kiemle, K. Heck, Y. Rothfuss, I. Braud, R. Helmig, J. Vanderborght (2024) Analysis of experimental and simulation data of evaporation-driven isotopic fractionation in unsaturated porous media. Vadose Zone Journal, e20363.

SiSPAT is a one-dimensional numerical model of water and energy fluxes in the soil-plant-atmosphere continuum. The extension SiSPAT-Isotope allows to sequentially solve the transport of stable water isotopologues and their fractionation behaviour in soils. The source code is stored in the files Sispat_isotope_it.f and Subrsispat_isotope_it.f.

With gfortran Sispat_isotope_it.f the program is executed. The file nomfich.dat contains all input and output files used in the simulation and is read into Sispat_isotope_it.f.

This application requires a Fortran compiler which is able to read Fortran77, ideally the simply fortran compiler, to execute the source code.

An introduction to how SiSPAT is operated can be found in the user's manual (Braud, I., 2000. SiSPAT User’s manual, Version 3.0, 106 pp.). For access, download the provided user's manual. For more information, please contact Isabelle Braud or Youri Rothfuss. Additional information about the extension-package SiSPAT-isotope can be found in I. Braud, T. Bariac, J.P. Gaudet, M. Vauclin, SiSPAT-Isotope, a coupled heat, water and stable isotope (HDO and H218O) transport model for bare soil. Part I. Model description and first verifications, Journal of Hydrology, 2005, https://doi.org/10.1016/j.jhydrol.2004.12.013.</The user's manual for the extension package can be found in the download section.

More information is found here: https://soil-modeling.org/resources-links/model-portal/sispat