The author points out that Heaviside’s operational calculus, which has been used extensively in connection with electrical surges in transmission lines, may be used in the study of water hammer even though certain limitations are involved because of necessary approximations which must be made when applying it to hydraulics. In spite of these limitations, the method is useful in clarifying many surge problems, verifying some truths which have been established by other methods. It is not the purpose of this paper to attempt to cover the entire field of surge problems, but to introduce Heaviside’s operational calculus in the field of hydraulics for the study of water hammer.

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