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Indicators
Storyboard
The presence of pores is one of the key aspects of soil behavior. On one hand, it enables the movement of water and/or moisture within the soil, but on the other hand, it affects the soil's mechanical properties.
Therefore, it is crucial to have indicators that describe the presence of porosity and the proportion of water they contain, as these indicators play a vital role in characterizing the hydraulic, thermodynamic, and mechanical properties of the soil.
ID:(365, 0)
Model of solid volume, water and gas
Description
In the soil model, the total volume ($V_t$) of the sample consists of three main components:
• the solid volume ($V_s$): This component includes the volume of all the grains present in the sample.
• the water Volume ($V_w$): Represents the volume of water contained in both the micropores and macropores of the soil.
• the gas Volume ($V_g$): Comprises the volume of gas or air contained in the sample.
The following diagram summarizes this description:
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ID:(1642, 0)
Representation of effective depth
Description
The effective Depth ($D_e$) refers to the depth that the water contained in a volume of soil would reach if all the solid volume were "removed," as illustrated in the following image:
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This provides an intuitive measure of the water content in the soil.
ID:(1641, 0)
Mass model of solid, water and gas
Description
In the soil model, the total Mass ($M_t$) of the sample consists of three main components:
• the total Dry Mass of Sample ($M_s$): This component includes the masses of all the grains present in the sample.
• the mass of water in the soil ($M_w$): Represents the mass of water contained in both the micropores and macropores of the soil.
• the mass of gas in the soil ($M_g$): Comprises the mass of gas or air contained in the sample (which can be comparatively considered as nearly zero, i.e., $M_g\sim 0$).
ID:(2084, 0)
Internal surface
Description
One of the distinguishing properties of particulate matter, such as soil, is its internal surface area. By internal surface area, we mean the sum of all the surfaces of each of the grains. This surface area is one of the key factors for studying moisture behavior and the presence of nutrients in the soil.
When we multiply the surface area of each grain by its quantity, we obtain the total surface area. To determine the surface area of each grain, it is essential to consider its shape. It's important to remember that both sand and silt are modeled as spheres, while clay is represented as a straight parallelepiped.
ID:(1540, 0)