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Home / Programs / HYDRUS (2D/3D) / FAQ

HYDRUS FAQ

Frequently asked questions - Hydrus-1D and HYDRUS 2D/3D:

  1. Problem with Hydrus-1D installation
  2. Installation and Use of HYDRUS 2D/3D on Windows Vista
  3. ORTHOMIN Terminates – too many iterations, time step reduced
  4. How to run computational modules outside of GUI ?
  5. Could one use HYDRUS (2D/3D) for one-dimensional simulations ?
  6. Should I use solute flux or solute concentration boundary conditions?
  7. What to do when x-y graphs do not show up?
  8. Notes on Spatial and Temporal Discretization
  9. I cannot run HYDRUS-1D executable modules even for preinstalled projects
  10. I cannot modify intervals in the spectrum when displaying small values (e.g., for concentrations).
  11. Running computational modules in a batch.
  12. Why may water fluxes in the v.out and Boundary.out files differ?
  13. What is the difference in spatial discretization for groundwater and vadose zone problems?
  14. What are the most commonly used bottom boundary conditions?
  15. How to edit manually HYDRUS (2D/3D) input files?
  16. How to copy x-y line graphs to other applications?
  17. How to copy/send HYDRUS projects to another computer/user?
  18. What are values for various nitrate root uptake parameters?
  19. What does it means when my output shows NaN?
  20. How to display the HYDRUS animation in the PowerPoint presentation?
  21. The use of decimal points and/or decimal commas on PC with different regional settings.
  22. Notes on units in HP1.
  23. Can HYDRUS consider surface runoff or overland flow?
  24. What does HYDRUS-1D do when soil temperatures drop below freezing?
  25. Why the numerical solution does not converge for fine-textured soils and how to improve the convergence?
  26. -2 cm air entry option in the van Genuchten-Mualem soil hydraulic functions.
  27. When and how to use the Internal Interpolation Tables?
  28. Simulation with the Brooks & Corey function does not converge.
  29. How to run the computational module of Hydrus-1D from Matlab?
  30. Maximum number of optimized parameters
  31. The maximum allowed pressure at the soil surface, hCritS
  32. The minimum allowed pressure at the soil surface, hCritA
  33. Potential Evapotranspiration
  34. Hydrostatic conditions as initial condition
  35. Variable head boundary condition
  36. Moving of concentration and moisture fronts
  37. Differences between velocities in v.out and in Boundary.out
  38. Parameter l in the hydraulic conductivity function
  39. Solute transport BC - Pointer to the vector of boundary conditions
  40. Soil hydraulic parameters
  41. Nonequilibrium solute transport
  42. Output concentrations
  43. What is the maximum number of records for time-variable boundary conditions?

Frequently asked questions - Hydrus-2D (old version 1997-2005)

  1. New features in version 2.0 of Hydrus-2D
  2. Overland flow
  3. Conversion of projects from previous versions
  4. Contour levels
  5. Missing *.h2d files
  6. How to generate random scaling factors for part of the domain ?
  7. Operating systems (Windows 2000)
  8. Fluxes through a plane of interior nodes
  9. Fluxes along specific portions of boundaries
  10. Concentrations in the objective function
  11. Hydrus-1D versus Hydrus-2D; reasons to get both
  12. Installation and manuals
  13. Atmopheric BC on a potential Seepage Face
  14. Quick disappearance of the Execute DOS window
  15. Running model in a batch
  16. Time variable boundary conditions
  17. "Export All" option
  18. Network installation of the Hydrus-2D
 

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