Time Varying Between 20 To 100 Minutes Given Intensity Of Rain Calculator

Formula Used:

\[ Tm = \left(\frac{K}{i_{20-100}}\right)^{\frac{1}{0.5}} - b \]

Time in Minutes:

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1. What is the Time Varying Between 20 to 100 Minutes Formula?

The Time Varying Between 20 to 100 Minutes formula calculates the time duration based on rainfall intensity and empirical constants. It is used in hydrology and rainfall analysis to determine time variations within the specified range.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ Tm = \left(\frac{K}{i_{20-100}}\right)^{\frac{1}{0.5}} - b \]

Where:

\( Tm \) — Time in minutes
\( K \) — K Constant (empirical constant in m/s)
\( i_{20-100} \) — Intensity of Rain (Time between 20 to 100 Min) in m/s
\( b \) — Empirical Constant b in minutes

Explanation: The formula calculates time duration by relating rainfall intensity to empirical constants with a power relationship.

3. Importance of Time Calculation

Details: Accurate time calculation is crucial for hydrological modeling, flood prediction, and water resource management, especially when dealing with rainfall events of varying intensity.

4. Using the Calculator

Tips: Enter K Constant in m/s, Intensity of Rain in m/s, and Empirical Constant b in minutes. All values must be valid positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is the typical range for K Constant?
A: K Constant values typically range between 0.00001 to 0.0001 m/s, depending on regional rainfall characteristics.

Q2: How is rainfall intensity measured?
A: Rainfall intensity is typically measured using rain gauges or radar systems, expressed in mm/hr or converted to m/s.

Q3: What factors influence Empirical Constant b?
A: Empirical Constant b is influenced by local climatic conditions, topography, and soil characteristics, and is determined through field observations.

Q4: Can this formula be used for extreme rainfall events?
A: This formula is specifically designed for time periods between 20-100 minutes and may not be accurate for extremely short or long duration rainfall events.

Q5: How accurate is this calculation method?
A: The accuracy depends on the precision of the empirical constants and rainfall intensity measurements. It provides reasonable estimates for the specified time range.