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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 process is crucial for replenishing groundwater resources in hard rock areas.
The calculator uses the formula:
Where:
Explanation: The formula calculates the amount of water that infiltrates through the surface and recharges the sandstone aquifer based on the catchment area and normal monsoon rainfall.
Details: Accurate calculation of rainfall recharge is essential for sustainable groundwater management, water resource planning, and ensuring adequate water supply in hard rock regions.
Tips: Enter the area of computation in square meters and normal monsoon rainfall in meters. Both values must be positive numbers.
Q1: What is the significance of the constant 7 in the formula?
A: The constant 7 represents the recharge coefficient specific to hard rock sandstone areas, derived from empirical studies and regional hydrogeological characteristics.
Q2: How is the Area of Computation for Recharge determined?
A: The area is typically determined through hydrological mapping and catchment area analysis, considering the topographic and geological features of the region.
Q3: What time period is considered for Normal Rainfall in Monsoon Season?
A: Normal rainfall typically refers to the statistical average measured over a 30-year period during the monsoon months for accurate long-term assessment.
Q4: Are there limitations to this calculation method?
A: This method provides an estimate and may need adjustment based on specific local conditions, soil types, and actual infiltration rates.
Q5: How can this calculation help in water resource management?
A: It helps in estimating groundwater replenishment rates, planning water extraction limits, and developing sustainable water management strategies.