1. What is Specific Capacity of an Open Well?

Specific Capacity of an open well is a measure of the well's productivity, representing the discharge per unit drawdown. It indicates how efficiently a well can yield water and is crucial in groundwater hydrology for well design and management.

2. How Does the Calculator Work?

The calculator uses the Specific Capacity formula:

Where:

• \( K \) — Constant depending on the soil at the base of the well (m³/s)
• \( A_{cs} \) — Cross-sectional area of the well (m²)

Explanation: The formula calculates the specific capacity by dividing the soil constant by the cross-sectional area of the well, providing a measure of the well's yield efficiency.

3. Importance of Specific Capacity Calculation

Details: Accurate specific capacity estimation is essential for assessing well performance, designing efficient water extraction systems, and managing groundwater resources sustainably.

4. Using the Calculator

Tips: Enter the constant value in m³/s and the cross-sectional area in m². Both values must be positive and non-zero for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: What factors influence the constant K?
A: The constant K depends on soil properties at the well base, including permeability, porosity, and hydraulic conductivity.

Q2: How is cross-sectional area determined?
A: Cross-sectional area is calculated based on the well's shape; for circular wells, it's πr² where r is the radius.

Q3: What are typical specific capacity values?
A: Values vary widely depending on aquifer characteristics, but higher values indicate more productive wells.

Q4: Can this calculator be used for confined aquifers?
A: This specific formula is designed for open wells; different equations may be needed for confined aquifers.

Q5: How does specific capacity relate to well efficiency?
A: Higher specific capacity values generally indicate more efficient wells with better yield characteristics.