1. What is Depression Head?

The Depression Head is defined as height of the bottom of a well above the datum. It represents the drawdown or lowering of the water level in a well due to pumping or extraction of water.

2. How Does the Calculator Work?

The calculator uses the Depression Head formula:

Where:

• \( H \) — Depression Head (m)
• \( QY \) — Yield from an Open Well (m³/s)
• \( K_s \) — Specific Capacity
• \( A \) — Area of the Well (m²)

Explanation: The formula calculates the depression head by dividing the yield from the well by the product of specific capacity and the area of the well.

3. Importance of Depression Head Calculation

Details: Accurate depression head calculation is crucial for determining well performance, designing efficient pumping systems, and managing groundwater resources effectively.

4. Using the Calculator

Tips: Enter yield from open well in m³/s, specific capacity (dimensionless), and area of the well in m². All values must be positive numbers greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: What is the significance of specific capacity in this calculation?
A: Specific capacity represents the amount of water furnished under a standard unit head and is a key parameter in determining well efficiency.

Q2: How does area of the well affect depression head?
A: A larger well area typically results in a smaller depression head for the same yield, as the water extraction is distributed over a larger area.

Q3: What are typical units for depression head measurement?
A: Depression head is typically measured in meters (m) or feet (ft), representing the drawdown of water level in the well.

Q4: When is this calculation most important?
A: This calculation is particularly important in groundwater hydrology, well design, and when assessing the sustainable yield of water wells.

Q5: Are there limitations to this formula?
A: The formula assumes ideal conditions and may need adjustments for complex geological formations, well interference effects, or transient pumping conditions.