1. What is the Depression Head Calculation?

The Depression Head calculation determines the difference in water table level and water level in a well when pumping has stopped, specifically for conditions where coarse sand is present. This helps in understanding aquifer recovery and water table behavior.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( h1 \) — Depression Head 1 (Meter)
• \( h2 \) — Depression Head 2 (Meter)
• \( \Delta t \) — Total Time Interval (Second)
• \( \exp \) — Exponential function

Explanation: This formula models the exponential recovery of the water table in coarse sand aquifers after pumping has stopped.

3. Importance of Depression Head Calculation

Details: Accurate depression head calculation is crucial for understanding aquifer recovery rates, designing well systems, and managing groundwater resources in coarse sand environments.

4. Using the Calculator

Tips: Enter Depression Head 2 in meters and Total Time Interval in seconds. Both values must be positive numbers greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: Why is this specific to coarse sand?
A: Coarse sand has different hydraulic properties that affect water table recovery rates compared to finer materials.

Q2: What are typical values for Depression Head?
A: Values vary based on aquifer characteristics, pumping rates, and time intervals, typically ranging from 0.1 to 10 meters.

Q3: When should this calculation be used?
A: This calculation is specifically for analyzing well recovery in coarse sand aquifers after pumping has stopped.

Q4: Are there limitations to this equation?
A: This model assumes ideal conditions and may need adjustment for complex aquifer systems or varying soil properties.

Q5: How accurate is this calculation?
A: Accuracy depends on how well the actual conditions match the assumptions of the exponential recovery model for coarse sand.