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Issue No. 03 - July-September (1992 vol. 14)
ISSN: 1058-6180
pp: 23-33
<p>This article describes the computing problems in the field of tidal calculations in the Netherlands between 1920 and 1960. These calculations were necessary to predict the changes in the water movements caused by hydraulic works like the Zuiderzee Works and the Delta Works. The growth of computing problems in this field was not only caused by the increasing technical complexity of the hydraulic works, but also by the growing importance of the tidal calculations in the decision process. Before the introduction of the digital computer, several solutions were developed and used: numerical methods, contracting young men for the calculations, analog electrical machines, and large-scale models. The required accuracy of the predictions and the number of alternative plans for which calculations had to be done were important factors in the choice between the alternative methods.</p>

J. van den Ende, "Tidal Calculations in The Netherlands," in IEEE Annals of the History of Computing, vol. 14, no. , pp. 23-33, 1992.
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