HYDRUS Projects - Drip3D
- Project Group: Drip3D
- Description: Drip irrigation simulated using the three-dimensional transport domain. Described in Kandelous et al. (2011).
- Availability: Download HYDRUS projects now (10.6 MB)
- Note: These projects were created with an earlier version of Hydrus, and users using higher Hydrus versions need to convert them to their particular version.
Brief comments:
- To reduce the calculation time we consider the symmetry of soil water distribution and simulate only half of the domain (see Figure 5).
- We used an Opening to represent the dripper in the definition of the transport domain.
- We divided the domain in the y-direction (lateral) into two (non-even) Sub-layers, allowing us to define a small part of the lateral as an emitter.
- After these steps were done, we have in the Section tab:
a. Mesh Layers: representing the mesh-layers along the y axis. Their number can be modified (reduced or increased) by changing the number of FE-Mesh layers (default is 20) using the command Edit Solid.
b. Columns: representing different parts of the domain separated by an Opening (soil domain and a lateral).
c. Sub-Layers: representing the division of the domain described in point 3 above.
d. Inter-sections: different combinations of b and c, such that one can display only the emitter.
e. The last Inter-section allows us to select easily the emitter when defining the boundary conditions. - Before running the simulation, one can define the Cross-sections so that one can display charts of continuous water content/matric potential along a selected cross-section (here 3 cross-sections, as described in the paper).
- How to obtain the area associated with specified BCs? Run HYDRUS for few time steps, press Ctrl+c to stop the code, and find the required information in the output file Boundary.out. Use this area to specify the boundary flux, so that you get the exact drip discharge.
References:
Kandelous, M. M., J. Šimůnek, M. Th. van Genuchten, and K. Malek, Soil water content distributions between two emitters of a subsurface drip irrigation system, Soil Science Society of America Journal, 75(2), 488497, 2011.