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The Possible Recharge formula estimates the potential water recharge in hard rock areas with massive, poorly fractured rock formations. It calculates the gross recharge minus natural recharge of the area, providing insight into water availability in challenging geological conditions.
The calculator uses the formula:
Where:
Explanation: The formula accounts for water level changes during monsoon season, the size of the watershed area, and subtracts the total water extracted from the catchment area.
Details: Accurate recharge estimation is crucial for water resource management in hard rock areas, helping to determine sustainable water extraction limits and plan for water conservation in challenging geological formations.
Tips: Enter water level fluctuation in meters, watershed area in square meters, and gross water draft in cubic meters per second. All values must be valid positive numbers.
Q1: Why is this formula specific to hard rock areas?
A: Hard rock areas with massive, poorly fractured rock have unique water retention and recharge characteristics that differ from porous or well-fractured formations.
Q2: What does the 0.2 coefficient represent?
A: The 0.2 coefficient is an empirical factor that accounts for the specific recharge characteristics in hard rock formations with limited fracturing.
Q3: How accurate is this calculation?
A: This provides an estimate based on standard parameters. Actual recharge may vary based on local geological conditions, rainfall patterns, and other environmental factors.
Q4: When is the best time to measure water level fluctuation?
A: Water level fluctuation is typically measured during monsoon season when irregular rising and falling of water levels is most pronounced.
Q5: Can this formula be used for other geological formations?
A: This formula is specifically designed for hard rock areas with massive, poorly fractured rock. Different formulas may be more appropriate for other geological conditions.