Some Morphological Aspects and Hydrological Characterization of the Tagus Floods in the Santarém Region, Portugal
Source: Natural Hazards, Volume 31, Number 3, March 2004 , pp. 587-601(15)
Abstract:In Portugal, few studies have been made of the historical floods of the River Tagus (the longest in the Iberian Peninsula). This fact led to the study of the Lower Tagus (Santarém region) using written historical documents, cartographic documents and hydrological data, consisting mainly of water level records. With the support of the historical documents and the analysis of all the maps, it was possible to verify that the human intervention has been fundamental in the morphological changes of the Tagus' channel. It became aware that the river changed from a braided to a single channel with alternate bars. 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.
Document Type: Research Article
Affiliations: 1: Centro de Geologia, Faculdade de Ciências, Universidade de Lisboa, Ed. C2, 5° Piso, Campo Grande, 1749-016 Lisboa, Portugal, Email: email@example.com 2: Centro de Geologia, Faculdade de Ciências, Universidade de Lisboa, Ed. C2, 5° Piso, Campo Grande, 1749-016 Lisboa, Portugal, Email: firstname.lastname@example.org 3: Centro de Estudos Geográficos, Alameda da Universidade, Faculdade de Letras, 1600-214 Lisboa, Portugal, Email: email@example.com
Publication date: March 2004