Journal
HYDROGEOLOGY JOURNAL
Volume 13, Issue 5-6, Pages 886-888Publisher
SPRINGER
DOI: 10.1007/s10040-004-0355-z
Keywords
well hydraulics; tunnel discharge
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A simple analytical formula is developed to calculate transient discharge inflow rates into a tunnel or a well under constant drawdown. The agreement with the classical, but cumbersome diffusion-equation-based solution of Jacob and Lohman is excellent throughout the range of dimensionless times. By using only a straightforward logarithmic function, this explicit solution may therefore be used with great computational benefits in practice, and also when further mathematical manipulations such as differentiation or integration are required.
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