Some Morphological Aspects and Hydrological Characterization of the Tagus Floods in the Santarém Region, Portugal

T. Azevêdo (), E. Nunes () and C. Ramos ()

Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, 2004, vol. 31, issue 3, 587-601

Abstract: In Portugal, few studies have been made of the historical floods of the RiverTagus (the longest in the Iberian Peninsula). This fact led to the study of theLower Tagus (Santarém region) using written historical documents,cartographic documents and hydrological data, consisting mainly of waterlevel records. With the support of the historical documents and the analysisof all the maps, it was possible to verify that the human intervention has beenfundamental in the morphological changes of the Tagus' channel. It becameaware that the river changed from a braided to a single channel with alternatebars. From the hydrological data, return periods for the floods were determined,using the Pearson Type 3 distribution. The selection of the most important floods,from 1855 to 1998, enabled to build a ``flood hazard scale'' for this region. Copyright Kluwer Academic Publishers 2004

Keywords: Tagus river; historical floods; flood hazard (search for similar items in EconPapers)
Date: 2004
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DOI: 10.1023/B:NHAZ.0000024892.61336.ec

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