Possible Recharge In Sandy Alluvial Areas For Maximum Value Of Specific Yield Calculator

Formula Used:

\[ R = (20 \times h \times A) - D_G \]

Water Level Fluctuation (h):

Meter

Watershed Area (A):

Square Meter

Gross Water Draft (D_G):

Cubic Meter per Second

Possible Recharge (R):

Unit Converter ▲

Unit Converter ▼

From:	To:

1. What is the Possible Recharge Formula?

The Possible Recharge formula estimates the potential groundwater recharge in sandy alluvial areas by accounting for water level fluctuations, watershed area, and gross water extraction. It provides a practical approach to assess water availability in these specific geological formations.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ R = (20 \times h \times A) - D_G \]

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 multiplying water level fluctuation and watershed area by a factor of 20 (representing maximum specific yield for sandy alluvial areas), then subtracting the gross water extraction.

3. Importance of Possible Recharge Calculation

Details: Accurate recharge estimation is crucial for sustainable water resource management, groundwater modeling, and planning water extraction in sandy alluvial aquifers.

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 the factor 20 used in the formula?
A: The factor 20 represents the maximum specific yield value for sandy alluvial areas, which typically ranges from 15-20% of the total volume.

Q2: What are typical values for water level fluctuation?
A: Water level fluctuations in sandy alluvial areas typically range from 2-8 meters during monsoon seasons, depending on local hydrological conditions.

Q3: How accurate is this estimation method?
A: This method provides a reasonable estimate for preliminary assessments but should be verified with field measurements for critical applications.

Q4: Can this formula be used for other soil types?
A: This specific formula is optimized for sandy alluvial areas. Different coefficients would be needed for clayey or rocky aquifers.

Q5: What if the calculated recharge is negative?
A: A negative result indicates that water extraction exceeds potential recharge, signaling unsustainable water management practices.