¿Existe un prototipo de hietograma sintético para diseño hidrológico?

Abstract

The critical rainfall considered to avert disasters due to floods is the design rainfallthat hypothetically will occur in the future with certain frequency. Its use is due to the absence of historical series of flow able to de-duce the design flood. To predict the design hyetograph, which shape markedly affects the result hydrograph shape; there are numerous statistical and deterministic alternatives. Among the former, commonly used, it is assumed that the more plausible side comes from the synthesis of historical events. Then, this should be the paradigm for those schemes proposed as an alternative. But, as it seems that different mechanisms of synthe-sis do not produce similar shapes, typical hyetographs have been deduced by the Huff’s (1967) and Pilgrim’s et al. (1969) methods, characteristic of the approach mentioned and various rates have been compared to see if they constitute a variation of the same matrix. The tests considered 16 cases corresponding to four inter-vals’ duration of maximum intensity annual rainfall in four stations from the centre of Argentina. It has beenestablished that there is no essential concordance between the results of both techniques. There is not a unique archetype since there is a low correlation and it occurs for probabilities of no surplus superior to the advisable value for the Huff procedure.