Home
Back
Depression Head Formula:
| From: | To: |
Depression Head is defined as the height of the bottom of a well above the datum. It represents the hydraulic head depression caused by pumping or discharge from a well system.
The calculator uses the Depression Head formula:
Where:
Explanation: The formula calculates the depression head by dividing the discharge rate by the product of cross-sectional area and percolation intensity coefficient.
Details: Accurate depression head calculation is crucial for well design, groundwater flow analysis, and determining the efficiency of well systems in various geological formations.
Tips: Enter discharge in m³/s, cross-sectional area in m², and percolation intensity coefficient in m/s. All values must be positive and greater than zero.
Q1: What is the percolation intensity coefficient?
A: The percolation intensity coefficient is a constant that represents the formation characteristics around the well, indicating how easily water can percolate through the soil or rock.
Q2: How is cross-sectional area determined?
A: Cross-sectional area is typically calculated based on the well's geometry. For circular wells, it's πr² where r is the radius of the well.
Q3: What are typical values for percolation intensity coefficient?
A: Values vary widely depending on soil type - from 0.0001 m/s for clay to 0.01 m/s or more for gravel and sandy formations.
Q4: When is depression head calculation important?
A: It's critical in well design, groundwater resource management, and environmental impact assessments of pumping operations.
Q5: Are there limitations to this formula?
A: This simplified formula assumes homogeneous formations and may need adjustments for complex geological conditions or anisotropic aquifers.