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The Rainfall Infiltration Method is a technique used to estimate groundwater recharge from rainfall during monsoon seasons. It calculates the amount of water that infiltrates into subsurface aquifers, which is crucial for managing water resources in regions with seasonal rainfall patterns.
The calculator uses the formula:
Where:
Explanation: This formula calculates the total recharge by multiplying the infiltration factor by the catchment area and the normal rainfall amount during monsoon season.
Details: Accurate calculation of groundwater recharge is essential for sustainable water resource management, aquifer replenishment assessment, and planning water supply systems in monsoon-dependent regions.
Tips: Enter the rainfall infiltration factor, the computation area in square meters, and the normal rainfall in meters. All values must be positive numbers.
Q1: What is the typical range for rainfall infiltration factor?
A: The infiltration factor typically ranges from 0.1 to 0.3, depending on soil type, land use, and surface conditions.
Q2: How is the computation area determined?
A: The computation area is typically the catchment or watershed area where rainfall contributes to groundwater recharge.
Q3: What time period does "normal rainfall" refer to?
A: Normal rainfall typically refers to the 30-year average rainfall during monsoon months for a specific region.
Q4: Are there limitations to this method?
A: This method provides an estimate and may not account for variations in soil permeability, evaporation, or surface runoff.
Q5: Can this method be used for non-monsoon seasons?
A: While primarily designed for monsoon seasons, the method can be adapted for other periods with appropriate rainfall data.