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The Rainfall Recharge in Hard Rock Sandstone refers to the process by which rainwater infiltrates through the surface layers and percolates into the underlying hard rock sandstone aquifer. This calculation is essential for groundwater resource management in consolidated sandstone formations.
The calculator uses the formula:
Where:
Explanation: The formula calculates the volume of water that recharges the aquifer by multiplying the catchment area by the normal rainfall amount and a constant factor of 6, which represents the recharge coefficient for hard rock sandstone formations.
Details: Accurate rainfall recharge estimation is crucial for sustainable groundwater management, water resource planning, and understanding aquifer replenishment rates in hard rock sandstone areas.
Tips: Enter the area of computation in square meters and normal rainfall in meters. Both values must be positive numbers for accurate calculation.
Q1: What is the significance of the constant factor 6 in the formula?
A: The factor 6 represents the recharge coefficient specific to hard rock sandstone formations, accounting for infiltration rates and geological characteristics.
Q2: How is the area of computation determined?
A: The area of computation is typically the catchment area where rainfall contributes to groundwater recharge, determined through hydrological mapping and geological surveys.
Q3: What time period does "normal rainfall" refer to?
A: Normal rainfall typically refers to the statistical average measured over a 30-year period during monsoon seasons for the specific region.
Q4: Are there limitations to this calculation method?
A: This method provides an estimate and may need adjustment based on local geological conditions, land use patterns, and actual rainfall distribution.
Q5: How accurate is this recharge estimation?
A: While providing a good estimate for planning purposes, actual recharge rates may vary due to factors like soil moisture, evaporation, and surface runoff.