Armando could use the model to test the idea that very small sand grains lead to narrow, deep rivers by using sand with different grain sizes in the model and observing how water flows through the sand. By comparing the river channels formed with small sand grains versus larger grains, he can see if smaller grains tend to form narrower and deeper channels. This experimentation would involve controlling the sand grain size while keeping other variables constant and noting how the width and depth of the river channel changes in response to the grain size variation.
How Armando could proceed:
- Prepare the river flow model with sand layers of varying grain sizes, including very small grains.
- Allow water to flow through the model under the same conditions for each sand type.
- Observe and measure whether the river channel is narrower and deeper with smaller grain sizes compared to coarser sand.
- Compare results to test the hypothesis that smaller sand grains contribute to narrow, deep river formation.
This approach isolates the effect of sand grain size on river morphology, allowing Armando to test the idea in a controlled setting.