Possible Recharge In Hard Rock Areas With Massive, Poorly Fractured Rock For Maximum Specific Yield Calculator

Formula Used:

\[ R = (0.5 \times h \times A) - D_G \]

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 Possible Recharge in Hard Rock Areas?

Possible Recharge refers to the gross recharge minus the natural recharge of the area in hard rock formations with massive, poorly fractured rock characteristics, which affects maximum specific yield calculations.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ R = (0.5 \times h \times A) - D_G \]

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 groundwater recharge by considering water level fluctuations during monsoon season, watershed area, and total water extraction from the catchment area.

3. Importance of Possible Recharge Calculation

Details: Accurate recharge estimation is crucial for sustainable water resource management, groundwater budgeting, and planning water extraction in hard rock areas with limited fracture permeability.

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 valid positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What makes hard rock areas with massive, poorly fractured rock different?
A: These areas have limited fracture permeability, resulting in lower specific yield and different recharge characteristics compared to fractured or porous aquifers.

Q2: Why is the coefficient 0.5 used in the formula?
A: The 0.5 coefficient accounts for the specific yield characteristics and recharge efficiency in hard rock areas with massive, poorly fractured formations.

Q3: How is water level fluctuation measured?
A: Water level fluctuation is typically measured through monitoring wells, comparing pre-monsoon and post-monsoon groundwater levels.

Q4: What factors affect maximum specific yield in these formations?
A: Rock type, degree of weathering, limited fracture development, and mineral composition significantly affect specific yield in massive, poorly fractured hard rocks.

Q5: How accurate is this calculation method?
A: While providing a reasonable estimate, actual recharge may vary due to local geological conditions, rainfall patterns, and human activities affecting water extraction.