1. What is Constant Depression Head?

Constant Depression Head is the difference of level of waters table and the water level in the well, specifically for fine soil conditions. It's a crucial parameter in hydrogeology and well hydraulics.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( H \) — Constant Depression Head (m)
• \( Q \) — Discharge rate (m³/s)
• \( A_{cs} \) — Cross-sectional area (m²)
• 0.5 — Empirical constant for fine sand

Explanation: This formula calculates the constant depression head based on discharge rate and cross-sectional area, with a specific constant factor for fine sand conditions.

3. Importance of Constant Depression Head Calculation

Details: Accurate calculation of constant depression head is essential for well design, groundwater extraction planning, and understanding aquifer characteristics in fine sand formations.

4. Using the Calculator

Tips: Enter discharge in m³/s and cross-sectional area in m². Both values must be positive numbers. The calculator will compute the constant depression head specifically for fine sand conditions.

5. Frequently Asked Questions (FAQ)

Q1: What is the significance of the 0.5 constant?
A: The 0.5 constant is an empirical factor specific to fine sand conditions that accounts for the hydraulic properties and flow characteristics in this type of soil.

Q2: How does this differ from calculations for other soil types?
A: Different soil types have different empirical constants. The 0.5 factor is specifically calibrated for fine sand, while other soil types would use different constant values.

Q3: What are typical values for constant depression head?
A: Values vary depending on discharge rates and well dimensions, but typically range from a few centimeters to several meters in practical applications.

Q4: When is this calculation most applicable?
A: This calculation is most relevant for wells in fine sand aquifers and is used in groundwater extraction planning and well performance analysis.

Q5: Are there limitations to this formula?
A: This formula provides an empirical approximation and may need adjustment for extreme conditions or when dealing with heterogeneous soil compositions.