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Analysis of extreme rainfall in the Ebre Observatory (Spain)
Pérez Zanón, Núria; Casas Castillo, M. del Carmen; Rodríguez Solá, Raúl; Peña, Juan Carlos; Rius, Anna; Solé, J. Germán; Redaño Xipell, Angel
Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear
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Relationship between maximum rainfall rates for time intervals between 5 minutes and 24 hours has been studied from almost a century (1905-2003) of rainfall data registered in the Ebre Observatory (Tarragona, Spain). Intensity-duration-frequency (IDF) curves and its master equation for every return period in the location have been obtained, as well as the probable maximum precipitation (PMP) for all the considered durations. In particular, the value of the 1-day PMP has resulted 415 mm, very similar to previous estimations of this variable for the same location. Extreme rainfall events recorded in this period have been analyzed and classified according to their temporal scale. Besides the three main classes of cases corresponding to the main meteorological scales, local, mesoscale and synoptic, a fourth group constituted by complex events with high intense rates for a large range of durations has been identified also, indicating the contribution of different scale meteorological processes acting together in the origin of the rainfall. A weighted intensity index taking into account the maximum rainfall rate in representative durations of every meteorological scale has been calculated for every extreme rainfall event in order to reflect their complexity.
Peer Reviewed
Àrees temàtiques de la UPC::Desenvolupament humà i sostenible::Prospectiva, sistèmica i modelització
Precipitation (Meteorology)
IDF curves
extreme rainfall
probable maximum precipitation
scaling behavior
rainfall classification
Precipitacions (Meteorologia)

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