Comparison Between Two GIS Flood Models of the Magra River

International Journal of Geoinformatics and Geological Science

© 2019 by SSRG - IJGGS Journal

Volume 6 Issue 1

Year of Publication : 2019

Authors : Dr.Barbara Marana

10.14445/23939206/IJGGS-V6I1P103

How to Cite?

Dr.Barbara Marana, "Comparison Between Two GIS Flood Models of the Magra River," SSRG International Journal of Geoinformatics and Geological Science, vol. 6,  no. 1, pp. 9-15, 2019. Crossref, https://doi.org/10.14445/23939206/IJGGS-V6I1P103

Abstract:

Floods are frequent and widespread phenomena with a devastating impact on the environment, infrastructures, buildings, croplands and, in the worst cases, involving animal and human lives. The paper focuses on this issue in a specific area in Italy: for this reason, at first it is illustrated a detailed analysis of the territory at the estuary of the Magra river, in the Liguria region, an area affected by this problem for a while. Then it is introduced a GIS river flood model developed with the software ArcGIS, with the support of a hydraulic model provided by the HEC-RAS software, which can be used in ArcGIS thanks to the HEC-GeoRAS component. This model is then compared to another one, provided by the University of Genova, and realized with the GRASS software, also with the support of a hydraulic model provided by the HEC-RAS package. The results show a good level of agreement.
A further validation is also carried out with a comparison to the official expected flooding map provided by the Basin Authority and it shows to be quite satisfactory.

Keywords:

Floods, Magra River estuary, ArcGIS and GRASS Flood Models, Comparison, Validation

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