1. What Is Khosla's Formula?

Khosla's Formula is used to estimate runoff depth in inches based on rainfall depth and temperature. It provides a simple yet effective method for calculating the portion of precipitation that flows over the land surface into streams, rivers, or other water bodies.

2. How Does The Calculator Work?

The calculator uses Khosla's Formula:

Where:

• \( RKI \) — Runoff Depth in Inches
• \( RPI \) — Rainfall Depth in Inches
• \( Tf \) — Temperature in Fahrenheit

Explanation: The formula accounts for the relationship between rainfall, temperature, and runoff, with temperature adjustment to estimate the actual runoff depth.

3. Importance Of Run-off Calculation

Details: Accurate runoff estimation is crucial for water resource management, flood prediction, irrigation planning, and environmental impact assessments.

4. Using The Calculator

Tips: Enter rainfall depth in inches and temperature in Fahrenheit. Ensure values are valid (rainfall ≥ 0).

5. Frequently Asked Questions (FAQ)

Q1: What is the significance of the temperature adjustment?
A: Temperature affects evaporation rates, which influences how much rainfall actually becomes runoff versus being lost to the atmosphere.

Q2: What are typical runoff values?
A: Runoff values vary significantly based on rainfall intensity, soil type, land cover, and temperature conditions.

Q3: When is Khosla's Formula most applicable?
A: This formula is particularly useful for preliminary estimates in agricultural and hydrological studies where detailed data may not be available.

Q4: Are there limitations to this formula?
A: The formula provides a simplified estimate and may not account for all factors affecting runoff such as soil moisture, slope, and land use characteristics.

Q5: Can this formula be used for urban areas?
A: While the formula can provide estimates, urban runoff calculations typically require more complex models that account for impervious surfaces and drainage systems.