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The cross-sectional area of flow into a well represents the effective area through which water percolates into the well from the surrounding formation. It is a critical parameter in well hydraulics and groundwater flow calculations.
The calculator uses the formula:
Where:
Explanation: This formula calculates the cross-sectional area required for a given discharge rate based on the percolation characteristics of the formation and the depression head in the well.
Details: Accurate calculation of cross-sectional area is essential for well design, determining well efficiency, assessing groundwater potential, and designing appropriate well screens and filters.
Tips: Enter discharge in m³/s, percolation coefficient in m/s, and depression head in meters. All values must be positive and greater than zero for valid calculation.
Q1: What is percolation intensity coefficient?
A: The percolation intensity coefficient is a constant that represents the permeability and flow characteristics of the formation around the well.
Q2: How is depression head measured?
A: Depression head is measured as the difference between the static water level and the pumping water level in the well.
Q3: What factors affect the cross-sectional area calculation?
A: The calculation depends on the discharge rate, formation permeability (through coefficient C), and the drawdown in the well (depression head).
Q4: Can this formula be used for all well types?
A: This formula is primarily used for open wells and may need modifications for other well types or specific geological conditions.
Q5: How accurate is this calculation?
A: The accuracy depends on the precision of input parameters, particularly the percolation coefficient which may vary with soil/rock conditions.