Abstract
An accurate understanding of physical and socio-economic effects of landslides is fundamental to develop more refined risk management, mitigation strategies and land use policies. In this paper we develop a measure to consider the interconnection between physical and economic exposure, i.e. what we call the economic landslide susceptibility, namely the probability of landslide occurrence in an area weighted for its socio-economic exposure considering the real-estate market values. The economic landslide susceptibility is estimated through a method designed for large areas that we applied to the Umbria Region (Central Italy). The method makes use of landslide susceptibility maps and a real estate market value map for any given area under analysis. The innovative concept of economic landslide susceptibility (that is de facto an ex ante landslide cost assessment) may be interpreted as the potential loss that an area might suffer in terms of its propensity for landslides. Useful applications of the proposed method lie in a better territorial management and in the land use planning.
Highlights
Landslides are a widespread hazard, causing human fatalities in urban settlements, along transport corridors and at sites of rural industry (Froude and Petley 2018), representing the 7th worldwide largest killer among natural disasters and producing heavy economic damages in many countries (Herath and Wang 2009)
In this paper we develop a measure to consider the interconnection between physical and economic exposure, i.e. what we call the economic landslide susceptibility, namely the probability of landslide occurrence in an area weighted for its socio-economic exposure considering the real-estate market values
The economic landslide susceptibility is estimated through a method designed for large areas that we applied to the Umbria Region (Central Italy)
Summary
Landslides are a widespread hazard, causing human fatalities in urban settlements, along transport corridors and at sites of rural industry (Froude and Petley 2018), representing the 7th worldwide largest killer among natural disasters and producing heavy economic damages in many countries (Herath and Wang 2009). To produce effective results in reducing the risk of losses due to landslides and designing effective mitigation measures and land use planning it is necessary an interdisciplinary approach taking together physical and economic aspects (De Graff 2012; Prenger-Berninghoff and Greiving 2015). The risk assessment can be used for the quantification of the potential economic losses due to landslide occurrence. This goal might result hard to reach because the estimation of the possible losses due to landslides is a difficult task for the variety of potentially exposed elements (e.g. UNISDR et al 2009), important when looking at the urban context. The widespread presence of man and his activities has often led to an uncontrolled urban sprawl that exacerbates the effect of natural hazards (Geneletti et al 2007)
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