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Determine the volume of water stored in unit area if unit weight of water is 9.8 KN/m3, dry unit of soil is 17 KN/m3, field capacity (F) is 2.35 m2, and depth of root zone of the plant is 9 m.
  • a)
    36.69 m3
  • b)
    36 m3
  • c)
    36.12 m3
  • d)
    36.25m3
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
Determine the volume of water stored in unit area if unit weight of wa...
We have field capacity (F) = (γw x volume of stored in unit area of soil / γd x d)
Therefore volume of stored water = (γd. d. F / γw)
= (17 x 9 x 2.35 / 9.8) (where, γw = unit weight of water, γd = dry unit weight of soil)
= 359.55 / 9.8
= 36.69 m3.
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Community Answer
Determine the volume of water stored in unit area if unit weight of wa...
To determine the volume of water stored in unit area, we need to calculate the volume of water that can be stored in the root zone of the plant.

Given:
Unit weight of water = 9.8 KN/m³
Dry unit weight of soil = 17 KN/m³
Field capacity (F) = 2.35 m
Depth of root zone of the plant = 9 m

First, we need to calculate the volume of soil in the root zone. This can be done by multiplying the depth of the root zone by the unit weight of soil.

Volume of soil = Depth of root zone * Dry unit weight of soil

Volume of soil = 9 m * 17 KN/m³
Volume of soil = 153 KN

Next, we need to calculate the volume of water in the root zone. This can be done by subtracting the volume of soil from the total volume of the root zone.

Volume of water = Total volume of root zone - Volume of soil

Volume of water = (Depth of root zone - Field capacity) * 1 m²

Volume of water = (9 m - 2.35 m) * 1 m²
Volume of water = 6.65 m * 1 m²
Volume of water = 6.65 m³

Finally, we need to convert the volume of water from cubic meters to cubic kilonewtons (KN) using the unit weight of water.

Volume of water in KN = Volume of water * Unit weight of water

Volume of water in KN = 6.65 m³ * 9.8 KN/m³
Volume of water in KN = 65.17 KN

Therefore, the volume of water stored in unit area is 65.17 KN/m².

To convert it to the required unit of m³, we need to divide it by the unit weight of water:

Volume of water in m³ = Volume of water in KN / Unit weight of water

Volume of water in m³ = 65.17 KN / 9.8 KN/m³
Volume of water in m³ = 6.65 m³

Hence, the correct answer is option A) 36.69 m³.
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Determine the volume of water stored in unit area if unit weight of water is 9.8 KN/m3, dry unit of soil is 17 KN/m3, field capacity (F) is 2.35 m2, and depth of root zone of the plant is 9 m.a)36.69 m3b)36 m3c)36.12 m3d)36.25m3Correct answer is option 'A'. Can you explain this answer? for Civil Engineering (CE) 2025 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about Determine the volume of water stored in unit area if unit weight of water is 9.8 KN/m3, dry unit of soil is 17 KN/m3, field capacity (F) is 2.35 m2, and depth of root zone of the plant is 9 m.a)36.69 m3b)36 m3c)36.12 m3d)36.25m3Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Determine the volume of water stored in unit area if unit weight of water is 9.8 KN/m3, dry unit of soil is 17 KN/m3, field capacity (F) is 2.35 m2, and depth of root zone of the plant is 9 m.a)36.69 m3b)36 m3c)36.12 m3d)36.25m3Correct answer is option 'A'. Can you explain this answer?.
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