Abstract
A computationally simple method for the estimation of aquifer hydraulic diffusivity from observed piezometric-head variation because of an arbitrary variation in stream stage is proposed. The method makes use of the Fourier series representation of the arbitrary stream-stage variation. The piezometric-head variation due to a sinusoidal change in stream stage is derived in a computationally simple form, which was used as a basic solution in the method. Application of the method on a published data set shows that it accurately estimates the aquifer hydraulic diffusivity with less computational effort and can take into account any variation in stream stage.
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