1. What is the Rainfall Recharge Formula?

The Rainfall Recharge in Hard Rock Poorly Fractured refers to the process of water infiltration into the ground in areas where the underlying geology is hard rock with limited fractures. This formula calculates the amount of water that replenishes aquifers in such geological conditions.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Rfr \) — Rainfall Recharge in Hard Rock Poorly Fractured (m³/s)
• \( Acr \) — Area of Computation for Recharge (m²)
• \( Pnm \) — Normal Rainfall in Monsoon Season (m)

Explanation: The formula calculates the recharge rate by multiplying the area of computation by the normal rainfall amount and a constant factor of 6, which represents the recharge coefficient for hard rock poorly fractured areas.

3. Importance of Rainfall Recharge Calculation

Details: Accurate rainfall recharge estimation is crucial for managing groundwater resources, assessing water availability, and planning sustainable water use in hard rock geological formations with limited fracture systems.

4. Using the Calculator

Tips: Enter the area of computation in square meters and normal rainfall in monsoon season in meters. All values must be valid positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What types of areas does this formula apply to?
A: This formula specifically applies to hard rock areas with poorly fractured geological formations where water infiltration is limited.

Q2: Why is the constant factor 6 used in this formula?
A: The factor 6 represents the recharge coefficient empirically determined for hard rock poorly fractured areas, accounting for the specific infiltration characteristics of such geological formations.

Q3: How is normal rainfall in monsoon season determined?
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.

Q4: What are the limitations of this calculation?
A: This calculation provides an estimate and may need adjustment based on local geological variations, soil types, and actual rainfall patterns.

Q5: How can this calculation be used in water resource management?
A: This calculation helps in assessing groundwater recharge potential, planning water extraction rates, and developing sustainable water management strategies for hard rock areas.