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| Titel |
Flood risk mitigation and anthropogenic modifications of a coastal plain in southern Italy: combined effects over the past 150 years |
| VerfasserIn |
O. Petrucci, M. Polemio |
| 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 ; 7, no. 3 ; Nr. 7, no. 3 (2007-06-04), S.361-373 |
| Datensatznummer |
250004541
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| Publikation (Nr.) |
 copernicus.org/nhess-7-361-2007.pdf |
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| Zusammenfassung |
A study of the effects of human modification of a coastal plain mainly
involving land reclamation and flood protection is proposed. The approach
involves historical, geomorphological and hydrological data as a whole,
taking into account the equilibrium of rivers, plains and coastal areas.
The test area, a telling example of profound economic and social
transformation of a coastal plain, is the Piana di Sibari
(Calabria, southern Italy), subject to major human modifications over the
last 150 years. The study area, at most 300 m a.s.l., is 450 km2 wide and comprises 24 hydrographic basins.
The approach is based on the creation and analysis of four databases:
1) a historical series of geo-coded flood damage (DAMAGES
database), concerning damaging floods which occurred over the past few
centuries in the study area; 2) a geocoded series of protection
works for land reclamation, protection from floods and improvement of soil
stability in steep areas (WORKS database), gathered from the archives of
the agencies that carried out the works, organized in a GIS-format;
3) a historical series of maximum flood discharges and extreme rainy
events (HYMAX database) aimed at defining the trends of occurrence and the
intensity of flooding; 4) a coastal line position and migration over
time (COASTAL database), created using mainly literature data based on
discontinuous data such as historical maps and images.
The work describes the complex succession of floods, protection and
reclamation works, human transformation of the plain and major land use
changes over the last two centuries in the test area. The new
characteristics of the plain and its modifications, including major
engineering works, land-use transformation and urbanisation, are
illustrated. The damaging floods of the last 200 years, the modifications of
runoff and flooding due to works built over the basins, hydrological data
and the records concerning coastal modifications were used to create
specific databases and a GIS in which these data can be analyzed by
typology, location and extension.
The proposed approach highlights the high degree of correlation between
drainage basin management, mainly in terms of increasing protection from
natural hazards, and anthropogenic development in a broad coastal plain. |
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