Recharge From Rainfall In Alluvial East Coast Areas For Known Maximum Rainfall Factor Calculator

Formula Used:

\[ \text{Recharge from Rainfall in Alluvial East Coast} = 18 \times \text{Area of Computation for Recharge} \times \text{Normal Rainfall in Monsoon Season} \] \[ R_{aec} = 18 \times A_{cr} \times P_{nm} \]

Recharge from Rainfall in Alluvial East Coast (R_aec):

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1. What is Recharge from Rainfall in Alluvial East Coast?

The Recharge from Rainfall in Alluvial East Coast refers to the process by which rainwater infiltrates through the soil and percolates down to replenish the groundwater stored in alluvial aquifers. This is particularly important in coastal alluvial regions where groundwater resources play a vital role in water supply.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ R_{aec} = 18 \times A_{cr} \times P_{nm} \]

Where:

\( R_{aec} \) — Recharge from Rainfall in Alluvial East Coast (m³/s)
\( A_{cr} \) — Area of Computation for Recharge (m²)
\( P_{nm} \) — Normal Rainfall in Monsoon Season (m)
18 — Empirical coefficient for alluvial east coast regions

Explanation: The formula calculates the groundwater recharge rate based on the catchment area and normal monsoon rainfall, using a region-specific coefficient.

3. Importance of Groundwater Recharge Calculation

Details: Accurate groundwater recharge estimation is crucial for sustainable water resource management, especially in coastal alluvial regions where saltwater intrusion and over-extraction are significant concerns.

4. Using the Calculator

Tips: Enter the area of computation in square meters and normal rainfall in monsoon season in meters. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is the significance of the coefficient 18 in the formula?
A: The coefficient 18 is an empirical factor specific to alluvial east coast regions that accounts for soil permeability, infiltration rates, and other local hydrological characteristics.

Q2: How is Normal Rainfall in Monsoon Season determined?
A: Normal Rainfall in Monsoon Season refers to the statistical average of rainfall measured over a specified period, typically 30 years, during the monsoon months in a given region.

Q3: What areas are considered "Alluvial East Coast"?
A: These typically refer to coastal regions with alluvial soil deposits, characterized by sandy or loamy soils with good permeability, commonly found along eastern coastal plains.

Q4: Are there limitations to this calculation method?
A: This method provides an estimate and may not account for variations in soil types, land use patterns, or extreme weather events that affect actual recharge rates.

Q5: How often should recharge calculations be updated?
A: Recharge calculations should be updated regularly, especially when there are significant changes in land use patterns or updated rainfall data becomes available.