Recharge From Rainfall In Indo Gangetic And Inland Alluvial Areas For Known Minimum Rainfall Factor Calculator

Formula Used:

\[ \text{Recharge from Rainfall} = 20 \times \text{Area of Computation for Recharge} \times \text{Normal Rainfall in Monsoon Season} \] \[ R_{rf} = 20 \times A_{cr} \times P_{nm} \]

Recharge from Rainfall (R_rf):

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1. What is Recharge from Rainfall?

Recharge from Rainfall refers to the process by which precipitation replenishes the groundwater supply. In Indo-Gangetic and Inland Alluvial Areas, this is particularly important for managing groundwater resources and ensuring sustainable water availability.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ R_{rf} = 20 \times A_{cr} \times P_{nm} \]

Where:

\( R_{rf} \) — Recharge from Rainfall (m³/s)
\( A_{cr} \) — Area of Computation for Recharge (m²)
\( P_{nm} \) — Normal Rainfall in Monsoon Season (m)

Explanation: The formula calculates the amount of water that infiltrates the ground and replenishes aquifers based on the catchment area and normal monsoon rainfall.

3. Importance of Rainfall Recharge Calculation

Details: Accurate calculation of rainfall recharge is crucial for groundwater management, water resource planning, and ensuring sustainable water supply in agricultural and urban areas.

4. Using the Calculator

Tips: Enter the area of computation for recharge in square meters and the normal rainfall in monsoon season in meters. All values must be valid (area > 0, rainfall > 0).

5. Frequently Asked Questions (FAQ)

Q1: Why is the factor 20 used in the formula?
A: The factor 20 is an empirical coefficient derived from studies in Indo-Gangetic and Inland Alluvial Areas, representing the recharge efficiency from rainfall.

Q2: What is considered normal rainfall in monsoon season?
A: Normal rainfall refers to the statistical average of rainfall measured over a specified period, typically 30 years, during the monsoon months in a given region.

Q3: How accurate is this calculation method?
A: This method provides a good estimate for planning purposes but may need adjustment based on local soil conditions, land use, and other hydrological factors.

Q4: Can this formula be used for other regions?
A: This formula is specifically calibrated for Indo-Gangetic and Inland Alluvial Areas. Other regions may require different coefficients or formulas.

Q5: What units should be used for input values?
A: Area should be in square meters (m²) and rainfall in meters (m). The result will be in cubic meters per second (m³/s).