Session 1A - Infiltration of Water Into a One-Dimensional Soil Profile
Project Manager Button “New”
Name: Infiltr1
Description: One-Dimensional Infiltration of Water
Button “Open”
Main Processes Heading: One-Dimensional Infiltration
Button “Next”
Geometry Information Geometry Type: Rectangular
Button “Next”
Time Information Final Time: 1
Initional Time Step: 0.0001
Minimum Time Step: 0.000001
Button “Next”
Print Information Number of Print Times: 10
Button "Select Print Times": 0.1, 0.2 ….., 1
Button “Next”
Water Flow - Iteration Criteria Water Content Tolerance: 0.0005
Pressure Head Tolerance: 0.5
Lower Time Step Multiplication Factor: 1.25
Lower Limit of the Tension Interval: 0.001
Upper Limit of the Tension Interval: 200
Button “Next”
Water Flow - Soil Hydraulic Model Button “Next”
Water Flow - Water Flow Parameters Catalog of Soil Hydraulic Properties: Loam
Button “Next” (If the program crashes at this moment and HYDRUS2D.exe is older than September 1999, please contact either IGWMC or USSL for the new version. The crash was caused by erroneous memory allocation.)
Rectangular Geometry Vertical Rectangular Dimension: 100
Number of Horizontal Columns: 51
Button “Next”
Space Discretization Button “Next”
The BOUNDARY Module:
Menu: View->Stretching->In x-direction: 0.1
- Initial Condition:
Menu: Condition->Initial Condition->Pressure Head:
Button “Select” - Select two nodes at the soil surface
Button “Set Value”: 0 - Boundary Condition:
Toolbar Button: “Water Flow BC”
Button “Constant Pressure”, Select two nodes at the soil surface, Specify h=0
Button “Free Drainage”, Select two nodes at the bottom of the soil profile - Observation Nodes:
Toolbar Button: “Observation Nodes”
Button “Insert”, Select nodes at z-coordinates of 20, 40, 60, 80, 100 cm
Menu: File->Save Data
Menu: File->Close
Execute HYDRUS
(Execution time on P5-300 = 11s)
OUTPUT:
Menu: Post-Processing->Observation Points: Pressure Heads
Water Contents
Menu: Post-Processing ->Boundary Information->Boundary Fluxes: Constant Boundary Flux
Free Drainage Boundary Flux
Menu: Post-Processing ->Boundary Information->Cumulative Fluxes: Constant Boundary Flux
Free Drainage Boundary Flux
Menu: Post-Processing ->Mass Balance Information:
Menu: Post-Processing ->Graphical Display of Results Pressure heads Toolbar Button: “Spectral Maps”
Toolbar Button: “Values along a boundary between two selected points” Water contents
Velocities