HYDRUS
(2D/3D)
Software Package for Simulating
the Two- and Three-Dimensional Movement
of Water, Heat, and Multiple Solutes
in Variably-Saturated Media
User Manual
Version 1.02
March 2007
PC-Progress, Prague, Czech Republic
© 2007 J. Šimůnek
and M. Šejna. All rights reserved.
2
3
The HYDRUS Software Package for Simulating
the Two- and Three-Dimensional Movement
of Water, Heat, and Multiple Solutes
in Variably-Saturated Media
User Manual
Version 1.02
J. Šimůnek
1
, M. Šejna
2
and M. Th. van Genuchten
3
March 2007
1
University of California Riverside, Riverside, CA
2
PC-Progress, Prague, Czech Republic
3
George E. Brown, Jr. Salinity Laboratory, Riverside, CA
© 2007 J. Šimůnek
and M. Šejna. All rights reserved.
4
5
Table of Contents
Abstract..................................................................................................................................................17
Introduction to the HYDRUS Graphical User Interface ...............................................................17
1. Project Manager and Data Management...................................................................................21
2. Projects Geometry Information............................................................................................26
3. Flow Parameters ....................................................................................................................31
3.1. Main Processes............................................................................................................31
3.2. Inverse Solution ...........................................................................................................32
3.3. Time Information .........................................................................................................36
3.4. Output Information ......................................................................................................38
3.5. Iteration Criteria..........................................................................................................40
3.6. Soil Hydraulic Model...................................................................................................43
3.7. Water Flow Parameters...............................................................................................45
3.8. Neural Network Predictions ........................................................................................49
3.9. Anisotropy in the Hydraulic Conductivity ...................................................................50
3.10. Solute Transport...........................................................................................................51
3.11. Solute Transport Parameters.......................................................................................55
3.12. Solute Reaction Parameters.........................................................................................56
3.13. Temperature Dependence of Solute Transport Parameters..........................................59
3.14. Heat Transport Parameters.........................................................................................60
3.15. Root Water Uptake Model ...........................................................................................62
3.16. Root Water Uptake Parameters...................................................................................63
3.17. Root Distribution Parameters......................................................................................66
3.18. Time Variable Boundary Conditions ...........................................................................68
3.19. Constructed Wetlands ..................................................................................................70
4. Geometry of the Transport Domain.....................................................................................72
4.1. Boundary Objects.........................................................................................................72
4.1.1. Points ............................................................................................................75
4.1.2. Lines and Polylines.......................................................................................77
4.1.3. Arcs and Circles............................................................................................79
4.1.4. Curves and Splines........................................................................................82
4.1.5. Move, Copy, Rotate and Mirror Operations.................................................85
