Possible Recharge in Hard Rock Areas with Laterite Calculator

Formula Used:

\[ R = (2.5 \times h \times A) - D_G \]

Water Level Fluctuation (h):

Meter

Watershed Area (A):

Square Meter

Gross Water Draft (D_G):

Cubic Meter per Second

Possible Recharge (R):

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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 laterite formations. It calculates the difference between the gross recharge and the natural recharge of the area, providing insights into water availability in such geological settings.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ R = (2.5 \times h \times A) - D_G \]

Where:

\( R \) — Possible Recharge (m³/s)
\( h \) — Water Level Fluctuation (m)
\( A \) — Watershed Area (m²)
\( D_G \) — Gross Water Draft (m³/s)

Explanation: The formula accounts for the relationship between water level changes, watershed characteristics, and water extraction to estimate potential recharge capacity.

3. Importance of Recharge Calculation

Details: Accurate recharge estimation is crucial for water resource management, sustainable groundwater extraction planning, and understanding water availability in hard rock laterite areas.

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 water level fluctuation?
A: Water level fluctuation refers to the irregular rising and falling in the amount of water during different seasons, particularly during monsoon periods.

Q2: How is watershed area defined?
A: Watershed area refers to an isolated area with a well-demarcated boundary line that drains rainwater to a single outlet.

Q3: What does gross water draft represent?
A: Gross water draft refers to the total volume of water extracted or utilized from a catchment area.

Q4: Why is the 2.5 multiplier used in the formula?
A: The 2.5 multiplier is an empirical coefficient that accounts for specific hydrogeological characteristics of hard rock areas with laterite formations.

Q5: What are typical recharge values in these areas?
A: Recharge values vary significantly based on local geology, rainfall patterns, and extraction rates, but typically range from 5-20% of annual rainfall in hard rock laterite areas.