Possible Recharge in Hard Rock Area with Phyllites, Shales given Minimum Specific Yield Calculator

Formula Used:

\[ R = (1 \times h \times A) - D_G \]

Water Level Fluctuation:

Meter

Watershed Area:

Square Meter

Gross Water Draft:

Cubic Meter per Second

Possible Recharge:

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1. What is the Possible Recharge Calculation?

The Possible Recharge refers to the gross recharge minus the natural recharge of the area. It is a crucial parameter in hydrogeology for assessing water availability in hard rock areas with phyllites and shales, given the minimum specific yield characteristics of these formations.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ R = (1 \times h \times A) - D_G \]

Where:

\( R \) — Possible Recharge (Cubic Meter per Second)
\( h \) — Water Level Fluctuation (Meter)
\( A \) — Watershed Area (Square Meter)
\( D_G \) — Gross Water Draft (Cubic Meter per Second)

Explanation: This formula calculates the potential water recharge by considering the water level fluctuation during monsoon season, the watershed area, and subtracting the total water extracted from the catchment area.

3. Importance of Possible Recharge Calculation

Details: Accurate recharge estimation is essential for sustainable water resource management, groundwater modeling, and planning water extraction in hard rock terrains with phyllites and shales where specific yield is minimal.

4. Using the Calculator

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 positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Why is this calculation specific to hard rock areas with phyllites and shales?
A: These geological formations have unique hydrogeological properties with minimum specific yield, requiring specialized calculation methods for accurate recharge estimation.

Q2: What is the significance of water level fluctuation in this calculation?
A: Water level fluctuation during monsoon season indicates the amount of water that has percolated and contributed to groundwater recharge in the watershed area.

Q3: How does gross water draft affect the possible recharge?
A: Gross water draft represents the total water extracted from the system, which reduces the net available recharge in the catchment area.

Q4: What are typical values for possible recharge in these formations?
A: Values vary significantly based on local conditions, but are generally lower than in more permeable formations due to the minimal specific yield of phyllites and shales.

Q5: Can this calculator be used for other geological formations?
A: While the formula is general, the specific yield factor (1 in this case) may need adjustment for different geological formations with varying permeability characteristics.