Hydrus-1D Downloads
Here you can download the latest Hydrus-1D installation and several previous versions. Please let us know about any errors and bugs that you may encounter. We greatly appreciate your help. Thank you, Jirka and Mirek.
Installation Programs
Installation Instructions:
Download a self-extracting archive (for example H1D_4_08.exe) and run it. Extract setup files to a temporary directory. Go to this directory and run "setup.exe", which will install Hydrus-1D on your computer.
Other Downloads
History of Hydrus-1D versions - The list of changes and fixed errors
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Changes and new features in the latest version and previous versions:
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Version 4.14 - December 13, 2009
New Features and Changes:
- Updated conversion of ECe to ECw values from the Maas [1990] database.
Fixed Errors:
- Calculations of LAI or Surface Cover Fraction based on Bear's Law.
Version 4.13 - October 31, 2009
New Features and Changes:
- Version 2.1.002 of HP1 (see HP1 page for changes)
- New part of GUI supporting HP1
- Conversions of the Mass database for the threshold-slope salinity stress model from electric conductivity to osmotic head.
Fixed Errors:
- Mass balance error in the dual permeability model when different Ks values were used in the matrix and fracture domain.
- The main window might have remained locked after closing the Profile module.
Version 4.12 - April 11, 2009
New Features and Changes:
- New additional output (e.g., solute fluxes for observation nodes and profiles of hydraulic conductivities (thermal and isothermal) and fluxes (liquid, vapor, and total)). Brief description is here.
- An option to convert projects to earlier versions has been removed.
Version 4.11 - March 21, 2009
Fixed Errors:
- Fixed H2D_Clci.exe file that was damaged during digital signing and unable to run in version 4.10. As a result, it was not possible to calculate inverse problems.
Version 4.10 - February 15, 2009
Fixed Errors:
- A minor error in initialization of a variable (Altitude for some meteorological calculations) for the new Fortran compiler was fixed.
Version 4.09 - January 16, 2009
Fixed Errors:
- A newly used compiler initialized several variables differently than the old one, resulting in incorrect format for several graphical outputs.
Version 4.08 - January 4, 2009
New Features and Changes:
- Compensated root water and solute (passive and active) uptake based on Simunek and Hopmans (2009)
- Executable programs are about three times faster than in the standard version due to the loop vectorization.
Fixed Errors:
- Initial distribution of solute mass between different phases.
Version 4.07 - December 6, 2008
New Features and Changes:
- Surface Energy Balance (i.e., the balance of latent, heat, and sensible fluxes) for bare soils can be considered.
- Daily variations of meteorological variables can be generated by the model using simple meteorological models.
- The Mass Balance (Inverse) Information dialog window enables to display texts larger than the capacity of the Edit window.
- Preliminary (at present rather simple) support of the HYDRUS package for MODFLOW.
Version 4.06 - September 11, 2008
New Features and Changes:
- HP1 – support of dual-porosity models, higher user friendliness for HP1
- The Per Moldrup’s tortuosity model was implemented as an alternative to the Millington and Quirk (1960) model.
Version 4.05 - May 31, 2008
New Features and Changes:
- HP1 – support of dual-porosity models
- Linking of optimized parameters of different soil layers
- Constant mobile water content in multiple layers (in the Mobile-Immobile Water Model) when optimizing immobile water content
Fixed Errors:
- HP1: The command “Create default PHREEQC.tmp file” instead opened the technical manual.
- Disabling “Altitude” in the input dialog when Hargreaves equation to calculate potential ET is used, since it is not needed.
- The dual-porosity model with pressure head exchange sometime caused a crash of GUI.
Version 4.04 - May 25, 2008
New Features and Changes:
- Option to specify the nonequilibrium phase concentration initially at equilibrium with the equilibrium phase concentration
- Option to specify initial conditions in total (instead of liquid) concentrations
- Option to print fluxes instead of temperatures for observation nodes
- Improved output for Profile Information
- Improved online Help
Fixed Errors:
- Fixed error – production of the second solute due to degradation of the first nonlinearly sorbed first solute
- Fixed error - the velocity correction due to the temperature dependence of the Henry’s law coefficient for the second and further solutes (see eq. 3.12 of the manual).
Version 4.0 - January 2008
New features in Hydrus-1D version 4.xx (as compared to version 3.0) include:
- Vapor flow
- Coupled water, vapor, and energy transport
- Dual-permeability type water flow and solute transport
- Dual-porosity water flow with solute transport and two-site sorption in the mobile zone,
- Penman-Monteith combination and Hargreaves equations to calculate potential evapotranspiration
- Daily variations in evaporation, transpiration, and precipitation
- Support for the HP1 code, obtained by coupling HYDRUS with the PHREEQC biogechemical code.
Version 3.0 - April 2005
New features in Hydrus-1D version 3.0 (as compared to version 2.0) include:
- Root water uptake with compensation
- Additional analytical models for the soil hydraulic properties suggested by Kosugi [1996] (log normal model) and Durner [1994] (dual porosity model)
- Water flow in the dual-porosity system
- Solute transport with attachment/detachment coefficients, permitting simulations of colloid, virus, and bacteria transport
- Two kinetic sorption sites (one can be used for example for the air-water interface)
- Filtration theory based evaluation of attachment coefficients
- Carbon dioxide production and transport module
- Geochemical carbonate chemistry module that considers transport, precipitation/dissolution, cation exchange, and complexation reactions for major ions.
- The new model is (may be) about 3 times faster than the old model.