Home
Back
Well Function Formula:
| From: | To: |
The Well Function (W(u)) is a fundamental concept in hydrogeology used to analyze drawdown in aquifers during pumping tests. It represents the data plot of drawdown versus time (or drawdown versus t/rz) that is matched to the type curve of W(u) versus 1/u.
The calculator uses the Well Function formula:
Where:
Explanation: This formula provides a direct conversion from Chow's Function to the Well Function, which is essential for aquifer characterization and pumping test analysis.
Details: Accurate Well Function calculation is crucial for determining aquifer properties, estimating transmissivity and storativity, and analyzing groundwater flow behavior during pumping tests.
Tips: Enter Chow's Function value. The value must be valid (non-negative). The calculator will compute the corresponding Well Function value.
Q1: What is Chow's Function?
A: Chow's Function is a constant given by Chow that serves as an intermediate parameter in the calculation of the Well Function for aquifer analysis.
Q2: When is this calculation typically used?
A: This calculation is primarily used in hydrogeological studies during pumping test analysis to characterize aquifer properties and predict drawdown behavior.
Q3: What are typical values for Chow's Function?
A: Chow's Function values typically range from 0.1 to 10, depending on the specific aquifer conditions and time since pumping began.
Q4: Are there limitations to this equation?
A: This is a simplified conversion and should be used in conjunction with complete pumping test analysis methods for accurate aquifer characterization.
Q5: What other parameters are needed for complete aquifer analysis?
A: Complete analysis typically requires additional parameters including pumping rate, distance from well, time since pumping began, and observed drawdown measurements.