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Discussion papers | Copyright
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 04 May 2018

Research article | 04 May 2018

Review status
This discussion paper is a preprint. A revision of the manuscript is under review for the journal Natural Hazards and Earth System Sciences (NHESS).

A spatial multicriteria prioritizing approach for geohydrological risk mitigation planning in small and densely urbanized Mediterranean basins

Guido Paliaga1, Francesco Faccini2, Fabio Luino1, and Laura Turconi1 Guido Paliaga et al.
  • 1CNR IRPI Research Institute for Geo-Hydrological Protection – Strada delle Cacce 73, 10135 Torino, Italy
  • 2UNIVERSITA' DI GENOVA – DISTAV Department of Earth, Environmental and Life Sciences, Genoa University, Italy

Abstract. Landslides and floods, particularly flash floods, occurred currently in many Mediterranean catchments as a consequence of heavy rainfall events, causing damages and sometimes casualties. The high hazard is often associated to intense urbanization in particular along the coastline where streams are habitually culverted. The necessary risk mitigation strategies should be applied at catchment scale, considering the concurrent landslides and flood events and would need to be accurately planned in order to optimize the available economic resources.

In the present work 21 small catchments in a high hazard area have been assessed and compared through three sets of parameters: one describing the morphometric-morphological features related to flood and landslide hazard, another describing the degree of urbanization and of anthropogenic modifications at catchment scale and the last related to the elements that are exposed to risk. The aim of the research is to constitute a priority scale among the small catchments, applying the multicriteria analysis technique to the descriptive parameters and giving a support tool for decision makers, supporting a strong scheduling of long-time planning interventions at catchment scale.

This approach could be applied in similar context, even at sub-catchment scale, after identifying a suitable set of descriptive parameters depending on the active geomorphological processes and the kind of anthropogenic modification, obtaining the optimization of economic resources.

Guido Paliaga et al.
Guido Paliaga et al.
Guido Paliaga et al.
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