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| Titel |
Comparing historical-hydrogeomorphological reconstitution and hydrological-hydraulic modelling in the estimation of flood-prone areas – a case study in Central Portugal |
| VerfasserIn |
P. P. Santos, A. O. Tavares, A. I. A. S. S. Andrade |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 11, no. 6 ; Nr. 11, no. 6 (2011-06-14), S.1669-1681 |
| Datensatznummer |
250009487
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| Publikation (Nr.) |
 copernicus.org/nhess-11-1669-2011.pdf |
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| Zusammenfassung |
| The Arunca River basin in Central Portugal has a historical record of
hazardous events related to floods, causing widespread disturbance. This
article describes the application of two approaches based on well-known
methods for the estimation of flood-prone areas: (i)
historical-hydrogeomorphological reconstitution, applied to the entire
Arunca River basin, and (ii) hydrological-hydraulic modelling, applied to
four sections selected from different (upper, middle and lower) sectors of
the basin and including urban and rural areas along the Arunca River. The
mapping of the flood-prone areas obtained by these two methods was compared
in order to identify the main differences and similarities. Human
interventions (river channel and floodplain morphological changes) were
found to be the main factor explaining the differences and similarities
between the results obtained by both methods. The application of
hydrological-hydraulic modelling proved important in reinforcing the results
of the historical-hydrogeomorphological method; it also helped in
complementing the results produced by the latter method in urban areas and in
areas with insufficient historical records. The application of the
historical-hydrogeomorphological method, in turn, allowed for the size of
the flood-prone areas to be determined where the primary data (e.g. geometry, roughness and flow) was not accurate enough for
hydrological-hydraulic modelling. The methodological approach adopted
demonstrates the strong complementary relationship between the different
existing methods for estimating flood-prone areas, and may be reproduced for
other drainage basins. |
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