The HYDRUS computer software packages simulate the one-, two- or three- dimensional movement of water, heat and multiple solutes in variably saturated media. The program numerically solves the Richards' equation for saturated-unsaturated water flow and Fickian-based advection dispersion equations for heat and solute transport. The Flow equation incorporates a sink term to account for water uptake by plant roots. The Heat transport equation considers conduction as well as convection with flowing water. The Solute transport equations consider advective-dispersive transport in the liquid phase and diffusion in the gaseous phase. Hydrus numerically solves problems such as root water and solute uptake, infiltration from ponding, rainfall and irrigation, irrigation scheduling, bacteria, pesticide transport in soils and more.

Aim of the resource: 
Hydrus-1D is a Windows-based modeling environment for analysis of water flow and solute transport in variably saturated porous media. The software package includes the one-dimensional finite element model HYDRUS for simulating the movement of water, heat, and multiple solutes in variably saturated media. The model is supported by an interactive graphics-based interface for data-preprocessing, discretization of the soil profile, and graphic presentation of the results.
Using the resource
Potential benefits from using the resource: 
Strong user base
Windows based with guided user interface
1dimensional version is free of charge
Potential limitations from using the resource: 
2D and 3D model suites require license
Scope
Sub/region where used: 
Caribbean
Central Africa
Central and Western Europe
Central Asia
East Africa and adjacent islands
Eastern Europe
Mesoamerica
North Africa
North America
North-East Asia
Oceania
South America
South Asia
South-East Asia
Southern Africa
West Africa
Western Asia
Scale of application: 
Global
Regional
Sub-regional
National
Subnational
Local
Practical information
UN languages in which the resource is available: 
Development stage: 
Full, working product
Contact details
Contact Name (Person or group/organization): 
Dr. Roland Baatz, Coordinator International Soil Modelling Consortium and Jiri SImunek, University of California, Riverside
Resources
Is the resource freely available?: 
Yes
Do you want to add more details?: 
Yes