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Duration Formula:
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The Duration of Rainfall formula calculates the total duration of rainfall from a hyetograph by multiplying the number of time interval pulses by the length of each time interval. This provides the total rainfall duration for hydrological analysis.
The calculator uses the duration formula:
Where:
Explanation: The formula calculates the total rainfall duration by multiplying the number of recorded time intervals by the length of each interval.
Details: Accurate duration calculation is crucial for hydrological modeling, flood prediction, water resource management, and designing drainage systems. It helps in understanding rainfall patterns and their impact on watersheds.
Tips: Enter the number of time interval pulses observed in the rainfall hyetograph and the length of each time interval in hours. Both values must be positive numbers.
Q1: What is a rainfall hyetograph?
A: A rainfall hyetograph is a graphical representation of rainfall intensity against time, showing how rainfall is distributed over a specific period.
Q2: How do I count pulses in a hyetograph?
A: Pulses represent the discrete time intervals in the hyetograph where rainfall is recorded. Count the number of these intervals to get the pulse value.
Q3: What units should I use for time interval?
A: The calculator uses hours as the default unit, but you can use any consistent time unit as long as you maintain consistency throughout your calculations.
Q4: Can this calculator be used for other types of duration calculations?
A: While designed for rainfall duration, the basic formula can be applied to any situation where you need to calculate total duration from discrete time intervals.
Q5: What if my hyetograph has varying time intervals?
A: This calculator assumes constant time intervals. For varying intervals, you would need to sum the individual interval durations manually.