1. What is Discharge Given Specific Capacity?

Discharge given specific capacity is a calculation used in hydrogeology to determine the flow rate of water from a well based on its specific capacity and total drawdown. This relationship helps in assessing the well's productivity and efficiency.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Q \) — Discharge (m³/s)
• \( S_c \) — Specific Capacity (m²/s)
• \( s_t \) — Total Drawdown in Well (m)

Explanation: The formula calculates the discharge by multiplying the specific capacity of the well by the total drawdown observed during pumping.

3. Importance of Discharge Calculation

Details: Accurate discharge calculation is essential for well design, groundwater management, and determining the sustainable yield of aquifers. It helps in planning water extraction rates and ensuring long-term water resource availability.

4. Using the Calculator

Tips: Enter specific capacity in m²/s and total drawdown in meters. Both values must be positive numbers to compute a valid discharge rate.

5. Frequently Asked Questions (FAQ)

Q1: What is specific capacity?
A: Specific capacity is a measure of a well's productivity, defined as the discharge per unit drawdown (typically in m²/s or similar units).

Q2: How is total drawdown measured?
A: Total drawdown is measured as the difference between the static water level and the pumping water level in the well during operation.

Q3: What factors affect specific capacity?
A: Specific capacity can be influenced by aquifer characteristics, well construction, screen design, and the degree of well development.

Q4: Can this formula be used for all well types?
A: While the basic principle applies to most wells, specific conditions like partial penetration or boundary effects may require additional considerations.

Q5: How does discharge relate to well efficiency?
A: Higher discharge rates with lower drawdown indicate better well efficiency, as the well can produce more water with less energy expenditure.