1. What is the Recharge from Rainfall in Hard Rock Phyllites?

Recharge from Rainfall in Hard Rock Phyllites is the process by which precipitation infiltrates through fractures and fissures in the hard rock phyllite formation, replenishing groundwater aquifers in these specific geological settings.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( R_{hrp} \) — Recharge from Rainfall in Hard Rock Phyllites (m³/s)
• \( A_{cr} \) — Area of Computation for Recharge (m²)
• \( P_{nm} \) — Normal Rainfall in Monsoon Season (m)
• 14 — Rainfall factor coefficient for hard rock phyllite formations

Explanation: The formula calculates groundwater recharge by multiplying the catchment area with normal monsoon rainfall and a specific coefficient that represents the infiltration characteristics of hard rock phyllite formations.

3. Importance of Recharge Calculation

Details: Accurate recharge calculation is crucial for sustainable groundwater management, water resource planning, and understanding the water balance in hard rock phyllite regions where groundwater movement is primarily through secondary porosity.

4. Using the Calculator

Tips: Enter the catchment area in square meters and normal monsoon rainfall in meters. Both values must be positive numbers to get a valid recharge calculation.

5. Frequently Asked Questions (FAQ)

Q1: What makes hard rock phyllite formations special for recharge calculations?
A: Hard rock phyllites have specific fracture patterns and weathering characteristics that influence how rainfall infiltrates and recharges groundwater, requiring specialized calculation methods.

Q2: Why is the monsoon season rainfall specifically used?
A: Monsoon season typically contributes the majority of annual recharge in these regions due to higher rainfall intensity and duration during this period.

Q3: How was the coefficient value of 14 determined?
A: The coefficient is derived from empirical studies and field observations of recharge characteristics in hard rock phyllite formations under various hydrological conditions.

Q4: What are the limitations of this calculation method?
A: This method provides an estimate and may need adjustment for local geological variations, land use changes, and extreme weather conditions not captured by normal rainfall data.

Q5: Can this formula be used for other rock types?
A: No, this specific formula with the coefficient of 14 is designed specifically for hard rock phyllite and shale formations, which have unique hydrological properties.