Possible Recharge in Hard Rock Areas with Low Clay Content for Maximum Value of Specific Yield Calculator

Formula Used:

\[ R = (4 \times h \times A) - D_G \]

Water Level Fluctuation (h):

Meter

Watershed Area (A):

Square Meter

Gross Water Draft (D_G):

Cubic Meter per Second

Possible Recharge (R):

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1. What is the Possible Recharge Formula?

The Possible Recharge formula estimates the potential water recharge in hard rock areas with low clay content, accounting for water level fluctuations, watershed area, and gross water extraction.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ R = (4 \times h \times A) - D_G \]

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: The formula calculates potential recharge by considering the relationship between water level changes, catchment area size, and water extraction rates.

3. Importance of Possible Recharge Calculation

Details: Accurate recharge estimation is crucial for water resource management, groundwater sustainability assessment, and planning water extraction in hard rock terrains with low clay content.

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: What is specific yield in this context?
A: Specific yield refers to the maximum volume of water that can be drained by gravity from a saturated rock formation, which is particularly relevant in hard rock areas with low clay content.

Q2: Why is the multiplier 4 used in the formula?
A: The multiplier 4 accounts for the maximum specific yield characteristics in hard rock formations with low clay content, representing optimal recharge conditions.

Q3: What are typical values for water level fluctuation?
A: Water level fluctuations vary by region and season, typically ranging from 0.5 to 5 meters in hard rock areas during monsoon periods.

Q4: How does clay content affect the calculation?
A: Low clay content allows for better water percolation and higher specific yield, making this formula specifically designed for such geological conditions.

Q5: Can this formula be used for other geological formations?
A: This formula is specifically calibrated for hard rock areas with low clay content. Different formulas may be needed for other geological formations.