Announcement
Announcement: Note that the Hydrus-1D software package has been discontinued. While Version 4.17 of HYDRUS-1D will remain available to the public as is, any new developments will from now on be implemented only in Version 5 of HYDRUS. Note that version 4.17 of HYDRUS-1D has recently been fully updated and merged with HYDRUS (2D/3D) (version 3.04) to result in Version 5 of HYDRUS. New features of the one-dimensional part of Version 5 of HYDRUS include new modules PFAS, Cosmic, DPU, Particle Tracking, and C-Ride, as well as updated graphical capabilities, such as two-dimensional z-t graphs of selected variables. More details about Version 5 of HYDRUS.
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 the installation package (e.g. Hydrus1D_4.15.0110.exe) and run it.
Installation Instructions for version 4.14 and older:
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. Starting with version 4.15, the setup is launched automaticaly after running the installation package Hydrus1D_4.15.0110.exe.
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 4.17 - November 15, 2018
New Features and Changes:
- Graph of all meteo/energy fluxes (when surface energy balance is solved)
- Drainage fluxes (to horizontal drains) can be either through the bottom or vertically distributed.
- Triggered Irrigation in UnsatChem
- Graphs of major ions, EC, and SAR at observation nodes (UnsatChem).
- Updated graphs to be compatible with Windows 10.
Fixed Errors:
- Units in the field capacity calculations
- Observation nodes for UnsatChem did not work when file was too long.
Version 4.16 - February 10, 2013
New Features and Changes:
- Option to set Field Capacity as initial condition (Twarakavi et al., 2009)
- Display of wetting hydraulic functions for hysteretic soils
- Triggered irrigation
- Interception can be considered with the standard HYDRUS input (without the need for meteorological input)
- Graph for observation nodes for major ions, EC, and SAR
Fixed Errors:
- Porosity in the soil catalog for the Brooks and Corey model was updated based on Rawls et al (1982) (originally this value was based on the RETC report (van Genuchten et al., 1991)).
- Error in the Rosetta Module (Neural Network Prediction) causing breakdowns under certain circumstances.
- Error in calculations of the hydraulic conductivity in the Durner's (1994) model
Version 4.15 - August 4, 2012
New Features and Changes:
- Substantially extended help file
- Fully updated manual
- Input of sublimation constant and initial snow layer.
- New conversions of constants (EC, osmotic potential) for the salinity stress response function.
- Support for the silent (unattended) installation
Fixed Errors:
- Conversion of some first- and zero-order rate constants with respect to length units
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.