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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Hydro-environment : Effect of vegetation on floods: the case of the river magra
Effect of vegetation on floods: the case of the river magra
Author : R. BENIFEI (1), L. SOLARI (1) , A.VARGAS-LUNA (2), (3), G. GEERLING (4) & M. VAN OORSCHOT (4), (5)
The study of the influence of vegetation on hydraulic risk is of primary importance in river planning and decision making.
In this work, we investigate the effects of channel and riparian vegetation on the catastrophic flood event that occurred
on 25/10/2011 in the river Magra, (Tuscany region, Italy). This 200-year-return-period flood had produced the loss of
many human lives and enormous material damages, especially in the town of Aulla. Preliminary hydraulic studies,
carried out with 1D models, showed that riparian vegetation located on the floodplain strongly influenced the flood by
increasing the water levels of about 0.8 m in the river reach facing the town of Aulla, thus producing overflow of the
embankments and flooding of large urbanized areas. Based on these results, the Tuscany region decided to remove the
floodplain vegetation as a preventive action. Ecological damages and major changes in river morphodynamics were
reported after removing the riparian vegetation. This work addresses the effectiveness of different flood mitigation
strategies by using a more detailed hydrodynamic model, i.e. the 2D morphological model Delft3D which includes a submodel
for evaluating the presence of various species of vegetation in different areas of the river.
File Size : 804,475 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Hydro-environment
Date Published : 20/08/2015
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