Formula Used:
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The formula calculates the discharge from a well based on specific capacity, cross-sectional area, and constant depression head. It provides an accurate assessment of water flow rate from wells and is essential for groundwater resource management.
The calculator uses the formula:
Where:
Explanation: The formula calculates the flow rate by multiplying the specific capacity of the well by its cross-sectional area and the constant depression head.
Details: Accurate discharge calculation is crucial for well design, groundwater resource assessment, irrigation planning, and determining sustainable water extraction rates.
Tips: Enter specific capacity in m/s, cross-sectional area in m², and constant depression head in m. All values must be positive numbers.
Q1: What is specific capacity in well hydraulics?
A: Specific capacity is a measure of well productivity, defined as the discharge per unit drawdown (Q/s).
Q2: How is cross-sectional area determined for a well?
A: For circular wells, cross-sectional area is calculated as π × (radius)². For rectangular wells, it's length × width.
Q3: What factors affect constant depression head?
A: Depression head is influenced by aquifer characteristics, well construction, pumping rate, and duration of pumping.
Q4: When is this formula most applicable?
A: This formula is particularly useful for steady-state flow conditions in confined and unconfined aquifers.
Q5: Are there limitations to this calculation method?
A: The formula assumes homogeneous aquifer conditions and may need adjustment for complex geological settings or transient flow conditions.