Storminess and geo-hydrological events affecting small coastal basins in a terraced Mediterranean environment

Cevasco, Andrea; Diodato, Nazzareno; Revellino, Paola; Fiorillo, Francesco; Grelle, G.; Guadagno, Francesco M.

doi:10.1016/j.scitotenv.2015.06.017

Cited by 60 publications

(61 citation statements)

References 62 publications

(71 reference statements)

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“…Due to self-regenerating storm cells or to persistent cyclonic Tyrrhenian circulation (Crosta 1998;Cevasco et al 2009), extreme precipitation can occur, between late summer and mid-autumn, along the coast of eastern Liguria (van Delden 2001;Silvestro et al 2012Silvestro et al , 2015Rebora et al 2013;Buzzi et al 2014;Cevasco et al 2015;Cassola et al 2016). Usually these rainstorms have short duration (<24 h), but rainfall intensities can reach or exceed values of 100 mm h ¡1 .…”

Section: General Features Of the Study Areamentioning

confidence: 99%

Shallow landslide initiation on terraced slopes: inferences from a physically based approach

Schilirò

Cevasco

Esposito

et al. 2018

Geomatics, Natural Hazards and Risk

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In the last years, great efforts have been made to improve the assessment of the temporal and spatial occurrence of rainfall-induced shallow landslides. Therefore, in this paper we used a physically based stability model (TRIGRS) in order to reproduce the landslide event occurred in the Monterosso catchment (Cinque Terre, Eastern Liguria, Italy) on 25 October 2011. The input parameters of the numerical model have been evaluated taking into account the land-use setting and paying specific attention to the evaluation of the spatial variation of soil thickness on terraced areas. The resulting safety factor maps have been compared with the inventory map of the landslides triggered during the event. The simulation results, which have been obtained also considering four different spatial resolutions of the digital terrain model, emphasize the influence of land use in shallow landslide occurrence and indicate the importance of a realistic spatial variation of soil thickness to enhance the reliability of the model. Finally, different triggering scenarios have been defined using hourly rainfall values statistically derived from historical data. The results indicate the proneness of the area to shallow landsliding, given that rainfall events with a relatively low return period (e.g. 25 years) can trigger numerous slope failures.

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Section: General Features Of the Study Areamentioning

confidence: 99%

Shallow landslide initiation on terraced slopes: inferences from a physically based approach

Schilirò

Cevasco

Esposito

et al. 2018

Geomatics, Natural Hazards and Risk

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“…The lack of maintenance of dry stone walls because of agricultural land abandonment represents an important factor in increasing landslide susceptibility (Glade, ; Lasanta et al ., ; Lasanta et al ., ; Lesschen et al ., ). Furthermore, recent studies have shown that in Mediterranean areas, because of climate changes, a modifying distribution of precipitation with an increase in extreme events or multiday events is occurring (Piccarreta et al ., ; Cevasco et al ., ). The concomitance of land abandonment and precipitation change is increasing the land degradation risk (Piccarreta et al ., ; Vergari et al ., ).…”

Section: Introductionmentioning

confidence: 97%

Response of Terraced Slopes to a Very Intense Rainfall Event and Relationships with Land Abandonment: A Case Study from Cinque Terre (Italy)

et al. 2017

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Agricultural terraces represent one of the best ways to prevent land degradation in hilly and mountainous landscapes. However, it is widely recognized that terraced slopes are threatened by agricultural land abandonment. In the literature, very few studies have quantitatively examined the influence of agricultural abandonment on the stability of terraced slopes. The goal of this research is to investigate the relationships between landslide magnitude and land use conditions of agricultural terraced slopes. In particular, Light Detection And Ranging (LiDAR) elevation data, coupled with aerial photo interpretation, were used for the computation of shallow landslide mobilized volumes on terraced slopes affected by an intense rainfall event. We performed the analysis within the Vernazza basin, a small Mediterranean coastal catchment located in the “Cinque Terre” area (Liguria, northwestern Italy), comparing pre‐event and post‐event LiDAR datasets. The results revealed that abandoned terraced slopes have been affected by a higher amount of mobilized debris volumes than still‐cultivated terraces. Furthermore, terraces abandoned for a short time (less than 25–30 years) resulted in the most hazardous land use class, showing erosion rates that were approximately 2 and 3 times higher than terraced slopes abandoned a long time ago (more than 25–30 years) and still‐cultivated terraces, respectively. These findings highlight that land abandonment and agricultural mismanagement can intensify the magnitude of rainfall‐induced shallow landslides. Copyright © 2016 John Wiley & Sons, Ltd.

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“…The cumulative probability found by the GEV frequency distribution (Equation (1)) has been transformed in the Z value of the Standard normal distribution (Figure 7). This transformation has been carried out for the annual maxima series of rainfall (1,3,6,12, and 24 h), and obtains the symmetric series, with zero mean and standard deviation equal to 1. After the transformation in the normal standardized distribution, the progressive summation of the values highlights trends and fluctuations of the time series; this summation coincides with the Rescaled Adjusted Partial Sum (RAPS; [26]).…”

Section: Methods Usedmentioning

confidence: 99%

“…Despite hydroclimate millennia reconstruction not supporting a general unprecedented intensification of the Northern Hemisphere hydrological cycle in the twentieth century associated with both more extreme wet and dry conditions [1], rainstorms and their injuries are becoming more dangerous as population and infrastructure continue to increase and to occupy areas exposed to flood risk [2,3]. However, few literature sources are available worldwide regarding extreme precipitation and, especially, about rainstorm effects on regional and subregional terrestrial ecosystems and water resources [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Reconstruction of a Storm Map and New Approach in the Definition of Categories of the Extreme Rainfall, Northeastern Sicily

Fiorillo

Diodato²,

Meo³

2016

Water

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Abstract:After more than 350 mm of rainfall fell in a few hours on 22 November 2011, thousands of landslides and floods were induced in two main zones of Northeastern Sicily. The total rainfall has been reconstructed integrating available rain gauge data with Tropical Rainfall Measuring Mission (TRMM) satellite data from NASA (National Aeronautics and Space Administration); the landslide distribution in the field has confirmed the pattern of rainfall accumulated on 22 November 2011. Precipitation maxima of 1, 3, 6, 12, and 24 h was recognized as the hazardous events, which marks the evidence of a changing climate, with a shift toward more intense rainfalls in recent times. To investigate the sequence of the annual maxima, the historical time series have been transformed in the Standard normal distribution, from the cumulative probability of the GEV (Generalized Extreme Value) distribution. Following a similar definition of the Standard Precipitation Index (SPI), the transformation of the historical data in the standardized values allows the definition of categories of hourly maxima in term of extreme, severe, moderate, or mild. This transformation allows to eliminate the asymmetry of the time series, so that trends and fluctuations have been highlighted by the progressive accumulation of data (Rescaled Adjust Partial Sum). This statistical approach allows the improvement of the interpretability of the hydrological extreme events, and could also be used in other cases.

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Storminess and geo-hydrological events affecting small coastal basins in a terraced Mediterranean environment

Cited by 60 publications

References 62 publications

Shallow landslide initiation on terraced slopes: inferences from a physically based approach

Shallow landslide initiation on terraced slopes: inferences from a physically based approach

Response of Terraced Slopes to a Very Intense Rainfall Event and Relationships with Land Abandonment: A Case Study from Cinque Terre (Italy)

Reconstruction of a Storm Map and New Approach in the Definition of Categories of the Extreme Rainfall, Northeastern Sicily

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