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Well Loss Equation:
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The Well Loss Equation calculates the additional drawdown in a well caused by the turbulent flow of water through the well screen, well face, and inside the casing of the pump intake. It represents the energy losses due to turbulent flow within the well structure.
The calculator uses the Well Loss equation:
Where:
Explanation: The equation shows that well loss increases with the square of the discharge rate, indicating the turbulent nature of flow within the well structure.
Details: Accurate well loss calculation is crucial for determining total drawdown in pumping wells, designing efficient well systems, and optimizing pump performance. It helps in distinguishing between aquifer losses and well losses, which is essential for proper well maintenance and rehabilitation.
Tips: Enter the well constant C2 (dimensionless) and discharge rate in cubic meters per second. Both values must be non-negative numbers.
Q1: What factors affect the well constant C2?
A: The well constant C2 is influenced by well construction details, screen design, well development, and the degree of clogging or incrustation in the well.
Q2: How is well loss different from aquifer loss?
A: Aquifer loss is the drawdown caused by water flowing through the aquifer material, while well loss is the additional drawdown caused by turbulent flow within the well structure itself.
Q3: What are typical values for well constant C2?
A: Well-designed and properly developed wells typically have C2 values between 0.5-2.0 sec²/m⁵, while poorly constructed or clogged wells may have higher values.
Q4: How can well loss be minimized?
A: Well loss can be minimized through proper well design, adequate screen area, proper well development during construction, and regular maintenance to prevent clogging.
Q5: Why does well loss increase with the square of discharge?
A: The quadratic relationship indicates turbulent flow conditions within the well, where energy loss is proportional to the square of the flow velocity.