Abstract

CAMPOS-ARANDA, D.F.. Contrast of the Distribution SRET in the Potosi Highlands in Mexico. Ing. invest. y tecnol. [online]. 2011, vol.12, n.2, pp.119-127. ISSN 2594-0732.

First, the importance of maximum daily rainfall predictions as the base for designing flood estimation is pointed out, particularly when recording rain-gages and hydrometric information are not available. Besides, the advantages of regional methods when the data show outliers are cited and the two main objectives of this work are formulated. Next, the pluviometric information used is described. Late, four procedures of regional fit of the General Extreme Values (GEV) distribution are described and applied, based in the L moment technique, which are: (1) station-year method, (2) fit through averaging probability weighted moments, (3) median standardized values method and (4) fit through regional shape parameter. Three probabilistic models are applied to the pluviometric records: GVE, Log-Pearson type III and square-root exponential type (SRET). Finally, the predictions of probabilistic models and the regional results are contrasted; then several conclusions are formulated, which point out the simplicity and greater accuracy of the SRET function.

Keywords : annual maximum daily précipitation; GEV distribution; regional methods; SRET distribution.

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