Question:
Volume of water present in total pore volume of soil is referred as
Volume of water present in total pore volume of soil is referred as
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Degree of Saturation (\(S_r\)) is \( 0\% \) for completely dry soil, and \( 100\% \) for saturated soil where water has displaced all air from the pores.
Updated On: Aug 13, 2026
- Volume wetness
- Degree of saturation
- Porosity
- Void ratio
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The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept:
Soil physical properties describe the volumetric and gravimetric relationships between the three soil phases: solid minerals, liquid water, and gaseous air.
Key Formula or Approach:
The volumetric parameters are defined as follows:
- Porosity (\(\eta\)): The ratio of total pore volume (\(V_v\)) to total bulk soil volume (\(V_t\)):
\[ \eta = \frac{V_v}{V_t} \] - Void Ratio (\(e\)): The ratio of pore volume (\(V_v\)) to solid volume (\(V_s\)):
\[ e = \frac{V_v}{V_s} \] - Degree of Saturation (\(S_r\)): The ratio of the volume of water (\(V_w\)) to the total pore volume (\(V_v\)):
\[ S_r = \frac{V_w}{V_v} \]
Step 2: Detailed Explanation:
The degree of saturation measures the portion of the soil's pore space that is filled with water.
It ranges from \( 0 \) (completely dry soil, where pores contain only air) to \( 1 \) (or \( 100\% \), representing completely saturated soil where all pores are filled with water).
This parameter describes the relative wetness of the soil pores, distinct from "volume wetness" (volumetric water content), which measures water volume relative to the total bulk soil volume (\( \theta = V_w/V_t \)).
Step 3: Final Answer:
The volume of water present in the total pore volume of soil is called the degree of saturation.
Soil physical properties describe the volumetric and gravimetric relationships between the three soil phases: solid minerals, liquid water, and gaseous air.
Key Formula or Approach:
The volumetric parameters are defined as follows:
- Porosity (\(\eta\)): The ratio of total pore volume (\(V_v\)) to total bulk soil volume (\(V_t\)):
\[ \eta = \frac{V_v}{V_t} \] - Void Ratio (\(e\)): The ratio of pore volume (\(V_v\)) to solid volume (\(V_s\)):
\[ e = \frac{V_v}{V_s} \] - Degree of Saturation (\(S_r\)): The ratio of the volume of water (\(V_w\)) to the total pore volume (\(V_v\)):
\[ S_r = \frac{V_w}{V_v} \]
Step 2: Detailed Explanation:
The degree of saturation measures the portion of the soil's pore space that is filled with water.
It ranges from \( 0 \) (completely dry soil, where pores contain only air) to \( 1 \) (or \( 100\% \), representing completely saturated soil where all pores are filled with water).
This parameter describes the relative wetness of the soil pores, distinct from "volume wetness" (volumetric water content), which measures water volume relative to the total bulk soil volume (\( \theta = V_w/V_t \)).
Step 3: Final Answer:
The volume of water present in the total pore volume of soil is called the degree of saturation.
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