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While applying the Rational formula for computing the design discharge, the rainfall duration is stipulated as the time of concentration because
- a)this leads to the largest possible rainfall intensity
- b)this leads to the smallest possible rainfall intensity
- c)the time of concentration is the smallest rainfall duration for which the Rational formula is applicable
- d)the time of concentration is the largest rainfall duration for which the Rational formula is applicable
Correct answer is option 'A'. Can you explain this answer?
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While applying the Rational formula for computing the design discharg...
Time of concentration (tc) is the time when entire catchment starts contributing to surface run-off at channel and this is the minimum time required.
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While applying the Rational formula for computing the design discharg...
Explanation:
The Rational formula is a commonly used method for estimating peak runoff from a drainage area. It is given by the equation:
Q = CiA
Where:
Q = design discharge (peak runoff)
C = runoff coefficient (dimensionless)
i = rainfall intensity (in/hr or mm/hr)
A = drainage area (acres or hectares)
In the Rational formula, the rainfall intensity (i) is a key parameter that determines the design discharge. The intensity is influenced by the duration of the rainfall event.
Importance of Rainfall Duration:
The duration of the rainfall event affects the rainfall intensity. Generally, shorter durations result in higher intensities, while longer durations result in lower intensities.
Reason for Stipulating Time of Concentration as Rainfall Duration:
The time of concentration (Tc) represents the time it takes for water to travel from the farthest point in a watershed to the outlet. It is an important parameter in hydrologic calculations as it determines the time it takes for runoff to reach the outlet.
When applying the Rational formula, the rainfall duration is stipulated as the time of concentration because this leads to the largest possible rainfall intensity. This is beneficial for design purposes as it helps estimate the maximum potential runoff that a drainage system needs to handle.
Significance of the Largest Possible Rainfall Intensity:
Designing a drainage system to accommodate the largest possible rainfall intensity ensures that it can effectively manage peak runoff during extreme rainfall events. This is crucial for preventing flooding and minimizing damage to infrastructure.
Therefore, by stipulating the rainfall duration as the time of concentration, the Rational formula accounts for the worst-case scenario and provides a conservative estimate of the design discharge. This helps in designing a robust and efficient drainage system.
In conclusion, the choice of stipulating the rainfall duration as the time of concentration in the Rational formula is to ensure that the design discharge considers the largest possible rainfall intensity, which is essential for designing an effective drainage system.
The Rational formula is a commonly used method for estimating peak runoff from a drainage area. It is given by the equation:
Q = CiA
Where:
Q = design discharge (peak runoff)
C = runoff coefficient (dimensionless)
i = rainfall intensity (in/hr or mm/hr)
A = drainage area (acres or hectares)
In the Rational formula, the rainfall intensity (i) is a key parameter that determines the design discharge. The intensity is influenced by the duration of the rainfall event.
Importance of Rainfall Duration:
The duration of the rainfall event affects the rainfall intensity. Generally, shorter durations result in higher intensities, while longer durations result in lower intensities.
Reason for Stipulating Time of Concentration as Rainfall Duration:
The time of concentration (Tc) represents the time it takes for water to travel from the farthest point in a watershed to the outlet. It is an important parameter in hydrologic calculations as it determines the time it takes for runoff to reach the outlet.
When applying the Rational formula, the rainfall duration is stipulated as the time of concentration because this leads to the largest possible rainfall intensity. This is beneficial for design purposes as it helps estimate the maximum potential runoff that a drainage system needs to handle.
Significance of the Largest Possible Rainfall Intensity:
Designing a drainage system to accommodate the largest possible rainfall intensity ensures that it can effectively manage peak runoff during extreme rainfall events. This is crucial for preventing flooding and minimizing damage to infrastructure.
Therefore, by stipulating the rainfall duration as the time of concentration, the Rational formula accounts for the worst-case scenario and provides a conservative estimate of the design discharge. This helps in designing a robust and efficient drainage system.
In conclusion, the choice of stipulating the rainfall duration as the time of concentration in the Rational formula is to ensure that the design discharge considers the largest possible rainfall intensity, which is essential for designing an effective drainage system.
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While applying the Rational formula for computing the design discharge, the rainfall duration is stipulated as the time of concentration becausea)this leads to the largest possible rainfall intensityb)this leads to the smallest possible rainfall intensityc)the time of concentration is the smallest rainfall duration for which the Rational formula is applicabled)the time of concentration is the largest rainfall duration for which the Rational formula is applicableCorrect answer is option 'A'. Can you explain this answer?
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While applying the Rational formula for computing the design discharge, the rainfall duration is stipulated as the time of concentration becausea)this leads to the largest possible rainfall intensityb)this leads to the smallest possible rainfall intensityc)the time of concentration is the smallest rainfall duration for which the Rational formula is applicabled)the time of concentration is the largest rainfall duration for which the Rational formula is applicableCorrect answer is option 'A'. Can you explain this answer? for Civil Engineering (CE) 2024 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about While applying the Rational formula for computing the design discharge, the rainfall duration is stipulated as the time of concentration becausea)this leads to the largest possible rainfall intensityb)this leads to the smallest possible rainfall intensityc)the time of concentration is the smallest rainfall duration for which the Rational formula is applicabled)the time of concentration is the largest rainfall duration for which the Rational formula is applicableCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for While applying the Rational formula for computing the design discharge, the rainfall duration is stipulated as the time of concentration becausea)this leads to the largest possible rainfall intensityb)this leads to the smallest possible rainfall intensityc)the time of concentration is the smallest rainfall duration for which the Rational formula is applicabled)the time of concentration is the largest rainfall duration for which the Rational formula is applicableCorrect answer is option 'A'. Can you explain this answer?.
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