This English translation of the „Baustein Bodenwasserbewegung“ is a service provided by the Sustainicum team. Currently, it has not been approved by the authors.
Basic idea of the building block
This building block should illustrate and communicate a basic knowledge of the movement of water in the soil.
This building block is comprised of the following elements:
- Two identically constructed plexiglass two-layer soil models (use of the model can be arranged upon request), including model description and instructions
- Six films featuring two-layer soil models (basic model and two variations, each at normal and eight-times-normal speed)
- Optional: Simulation of groundwater movement with the program HYDRUS
Examples are in form of video files (flow animation) found in the accompanying material.
- Accompanying material: presentation and instructions for implementation
Description of the building block
Two-layer soil model
Two identically constructed plexiglass two-layer soil models should be arranged.
One of the two trial tank chambers should be filled with fine grain sand and the other with coarse grain sand.
Variations to the basic model:
Vary the layering pattern (random layers of sand of varying grain size); addition of soil aggregate; insertion of further separation walls; vary position of water in-flow.
Six videos featuring two-layer soil models (basic model and two variations, each at normal and eight-times-normal speed). These can be shown to supplement or replace the trial.
The simulation of groundwater movement with the program HYDRUS rounds out the building block. Examples are included as video files (flow animation) in the accompanying materials. Upon request the simulation of groundwater with the program HYDRUS can be completed at IHLW.
- Presentation documents (available as PowerPoint presentation and pdf-file) for the presenter
- Instructions for implementing the building block in the course
Application in the course
The use of this building block can be individually adjusted. The use of the building block is described in the instructions for implementation.
The following structure is suggested (see presentation documents):
- Expert input on groundwater and groundwater movement
- Presentation of the two-layer soil model including photo series
- Trial and film presentation
- Optional: Simulation with HYDRUS in small groups
Computer with the necessary software licenses for HYDRUS are available upon request in the seminar room of IHLW.
- Follow-up and discussion
Desired Aha Effect
The building block allows students to actually see water move through soil and, if possible, to model it on the computer. Students have the opportunity to immerse themselves in the connections and interactions between soil and the water cycle, as well as the corresponding theoretical basis. The significance of the global water balance will be made clear.