1. What is the Intensity of Rain Formula?

The intensity of rain formula calculates rainfall intensity based on time variation between 20 to 100 minutes. It describes the relationship between rainfall intensity and duration using empirical constants.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( ivt \) — Intensity of Rain given Varying Time (mm/min)
• \( K \) — K Constant (mm/min)
• \( Tm \) — Time in Minutes (minutes)
• \( bm \) — Empirical Constant b (minutes)

Explanation: The formula calculates rainfall intensity based on time duration and empirical constants, with time varying between 20 to 100 minutes.

3. Importance of Rainfall Intensity Calculation

Details: Accurate rainfall intensity calculation is crucial for hydrological studies, flood prediction, drainage system design, and water resource management.

4. Using the Calculator

Tips: Enter K Constant in mm/min, Time in Minutes between 20-100, and Empirical Constant b in minutes. All values must be valid positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Why is the time range limited to 20-100 minutes?
A: This formula is specifically designed and validated for rainfall durations between 20 to 100 minutes, making it most accurate within this range.

Q2: What are typical values for K Constant?
A: K Constant values vary by region and climate, typically ranging from 1-5 mm/min for most applications.

Q3: How is Empirical Constant b determined?
A: Empirical Constant b is derived from regional rainfall data analysis and varies based on local climatic conditions.

Q4: What are the applications of rainfall intensity calculation?
A: Applications include urban drainage design, flood forecasting, irrigation planning, and environmental impact assessments.

Q5: Are there limitations to this formula?
A: This formula is specifically designed for the 20-100 minute time range and may not be accurate for shorter or longer durations.