The Verdesca landslide in the Agri Valley (Basilicata, southern Italy): a new geological and geomorphological framework
Summary: A landslide, to the west of Montemurro (southern Italy), has recently caused damage to buildings and other infrastructure in an urbanized area. In this paper, we present the results of a study carried out using field surveys, geognostic investigations and TDR measurements in order to reconstruct the stratigraphy of the sediments involved and to further understand the geological and geomorphological context of the slope.
Nat. Hazards Earth Syst. Sci., 15, 2585-2595, doi:10.5194/nhess-15-2585-2015, 2015
The importance of entrainment and bulking on debris flow runout modeling: examples from the Swiss Alps
Summary: The sudden onset of large and erosive debris flows has been observed recently in different catchments in Switzerland, implicating the importance of erosion for debris flow modelling. Therefore, an erosion model was established based on field data (relationship between maximum shear stress and erosion depth and rate) of several debris flows measured at the Illgraben. Erosion model tests at the Spreitgraben showed considerable improvements in runout pattern as well as hydrograph propagation.
Nat. Hazards Earth Syst. Sci., 15, 2569-2583, doi:10.5194/nhess-15-2569-2015, 2015
Deterministic approach for multiple-source tsunami hazard assessment for Sines, Portugal
Nat. Hazards Earth Syst. Sci., 15, 2557-2568, doi:10.5194/nhess-15-2557-2015, 2015
Infrasound array criteria for automatic detection and front velocity estimation of snow avalanches: towards a real-time early-warning system
Summary: This data set contains infrasonic detection bulletin for data recorded between 1 December 2012 and 31 March 2013 by the infrasound array deployed in Ischgl, Austria, and described in the paper. This data set contains all infrasound detections that are used to derive most of the results presented in the manuscript.
Nat. Hazards Earth Syst. Sci., 15, 2545-2555, doi:10.5194/nhess-15-2545-2015, 2015
Review Article: Atmospheric conditions inducing extreme precipitation over the eastern and western Mediterranean
Summary: This review discusses published studies analyzing the atmospheric conditions that induce extreme precipitation over the eastern and western Mediterranean regions. It presents a systematic description of the interlacing role of several atmospheric processes of different scales - local, meso, and synoptic - that enable the development of torrential rains.
Nat. Hazards Earth Syst. Sci., 15, 2525-2544, doi:10.5194/nhess-15-2525-2015, 2015
Climate change adaptation frameworks: an evaluation of plans for coastal Suffolk, UK
Summary: A criterion to categorise climate change adaptation frameworks is presented denoting characteristics of three key frameworks established in the literature: scenario–led, decision-centric and vulnerability–led. Applying the criterion, the usability of frameworks is examined in coastal Suffolk. Results indicate adaptation frameworks established in the literature are not utilised in isolation in everyday practice. In reality, hybrid approaches are utilised to overcome aspects of framework weakness.
Nat. Hazards Earth Syst. Sci., 15, 2511-2524, doi:10.5194/nhess-15-2511-2015, 2015
Coastal flooding of urban areas by overtopping: dynamic modelling application to the Johanna storm (2008) in Gâvres (France)
Summary: The proposed methodology aims to simultaneously simulate wave overtopping and the resulting flood in an urban area, with respect to chronology and buildings effect. Based on a downscaling approach, this method uses a time-dependent phase-resolving model to simulate dynamically the flows on a DEM including buildings. Applied to the Johanna storm in Gâvres (France), this method allowed for obtaining very realistic results in terms of water depths and flow velocities at a very high resolution.
Nat. Hazards Earth Syst. Sci., 15, 2497-2510, doi:10.5194/nhess-15-2497-2015, 2015
Estimating flood damage to railway infrastructure – the case study of the March River flood in 2006 at the Austrian Northern Railway
Nat. Hazards Earth Syst. Sci., 15, 2485-2496, doi:10.5194/nhess-15-2485-2015, 2015
Liquefaction susceptibility assessment in fluvial plains using airborne lidar: the case of the 2012 Emilia earthquake sequence area (Italy)
Summary: The 2012 Emilia seismic sequence (Italy) caused significant liquefaction-related damage. We used a lidar DTM and the 2012 liquefaction data to (a) perform a geomorphological study of the Po River plain and (b) define the liquefaction susceptibility of the geomorphologic features. Results indicate that fluvial landforms acted as a preferential location for the occurrence of liquefaction. We quantitatively defined a hierarchy in terms of liquefaction susceptibility for an ideal fluvial environment
Nat. Hazards Earth Syst. Sci., 15, 2473-2483, doi:10.5194/nhess-15-2473-2015, 2015
Detailed and large-scale cost/benefit analyses of landslide prevention vs. post-event actions
Nat. Hazards Earth Syst. Sci., 15, 2461-2472, doi:10.5194/nhess-15-2461-2015, 2015
Lightning characteristics over the eastern coast of the Mediterranean during different synoptic systems
Nat. Hazards Earth Syst. Sci., 15, 2449-2459, doi:10.5194/nhess-15-2449-2015, 2015
Railway deformation detected by DInSAR over active sinkholes in the Ebro Valley evaporite karst, Spain
Summary: The bedrock of the Ebro Valley consists of soluble geological formations of evaporites. The subsurface dissolution of these rocks makes this area particularly prone to the development of sinkholes. These show subsidence that causes damage to man-made structures. The article focuss on the subsidence detected along railways that traverse sinkholes. DInSAR analysis may help in the identification of subsiding sectors of railway tracks that may compromise the safety of travellers.
Nat. Hazards Earth Syst. Sci., 15, 2439-2448, doi:10.5194/nhess-15-2439-2015, 2015
Repeated glacial lake outburst flood threatening the oldest Buddhist monastery in north-western Nepal
Summary: The supraglacial lake basin was mapped by DGPS and the SFM approach from terrestrial photographs. The maximum filling capacity of the lake was estimated, with a maximum discharge of 77.8 m3/s, calculated using an empirical relation. The flooded area in the valley was delineated by employing a raster-based hydraulic model. A coincidence of the GLOF events with high values of cumulative above-zero temperature and precipitation calculated from the HAR data set was revealed.
Nat. Hazards Earth Syst. Sci., 15, 2425-2437, doi:10.5194/nhess-15-2425-2015, 2015
Quantitative comparison between two different methodologies to define rainfall thresholds for landslide forecasting
Nat. Hazards Earth Syst. Sci., 15, 2413-2423, doi:10.5194/nhess-15-2413-2015, 2015
A non-stationary earthquake probability assessment with the Mohr–Coulomb failure criterion
Summary: This paper introduces a new non-stationary calculation of characteristic earthquake probability, motivated and derived from the Mohr-Coulomb failure criterion. A total of six parameters are present in the model, including earthquake return period, fault-plane strength parameters, rock unit weight, focal depth, and the level of uncertainty of annual stress increment. In addition to the detailed derivations in the algorithm, a model demonstration is also presented in the paper.
Nat. Hazards Earth Syst. Sci., 15, 2401-2412, doi:10.5194/nhess-15-2401-2015, 2015
Preliminary assessment for the use of VORIS as a tool for rapid lava flow simulation at Goma Volcano Observatory, Democratic Republic of the Congo
Summary: The Virunga area in the Democratic Republic of the Congo, with over 1 million inhabitants, has to permanently cope with the threat posed by the active Nyamulagira and Nyiragongo volcanoes. During the past century, Nyamulagira erupted at intervals of about every 3 years – mostly in the form of lava flows – at least 30 times. In order to identify a useful tool for hazard assessment at the Goma Volcanological Observatory, we tested VORIS, a freely available software (www.gvb-csic.es).
Nat. Hazards Earth Syst. Sci., 15, 2391-2400, doi:10.5194/nhess-15-2391-2015, 2015
Analysis of a landslide multi-date inventory in a complex mountain landscape: the Ubaye valley case study
Summary: The paper proposes an approach to prepare a multi-date landslide inventory for the Ubaye valley (French Alps), a complex mountainous area affected by several landslide types with different degrees of activity. The inventory covering the period 1956-2010 have been analysed in order to quantify the uncertainties associated to the mapping, to measure the evolution of morphological indicators and to estimate temporal occurrence. Evolution of landslide activity is compared to other inventory sources.
Nat. Hazards Earth Syst. Sci., 15, 2369-2389, doi:10.5194/nhess-15-2369-2015, 2015
Preface: Building social capacities for natural hazards: an emerging field for research and practice in Europe
Nat. Hazards Earth Syst. Sci., 15, 2359-2367, doi:10.5194/nhess-15-2359-2015, 2015
High-resolution analysis of 1 day extreme precipitation in Sicily
Summary: We investigate 1-day precipitation extremes in Sicily and their frequency distribution, based on a dense data set of high-quality, homogenized station records (1921-2005). Return levels corresponding to 10-, 50- and 100-year periods are produced on a high-resolution grid using a variant of regional frequency analysis combined with regression techniques. The results, which clearly reflect the complexity of this region, may be useful in the context of extreme precipitation risk assessment.
Nat. Hazards Earth Syst. Sci., 15, 2347-2358, doi:10.5194/nhess-15-2347-2015, 2015
Coupling scenarios of urban growth and flood hazards along the Emilia-Romagna coast (Italy)
Summary: The main idea behind this study was to contribute to a better understanding of coastal hazards and risks. This was achieved by proposing an approach that combines coastal flooding scenarios with different scenarios of urban growth. Once used jointly, these two methodologies can help to identify flood-prone areas that have a high potential for future urbanization, which makes this combination particularly useful for coastal managers and planners.
Nat. Hazards Earth Syst. Sci., 15, 2331-2346, doi:10.5194/nhess-15-2331-2015, 2015