Articles | Volume 20, issue 12
Nat. Hazards Earth Syst. Sci., 20, 3399–3411, 2020
https://doi.org/10.5194/nhess-20-3399-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Special issue: Remote sensing and Earth observation data in natural hazard...
Nat. Hazards Earth Syst. Sci., 20, 3399–3411, 2020
https://doi.org/10.5194/nhess-20-3399-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article 14 Dec 2020
Research article | 14 Dec 2020
Assessments of land subsidence along the Rizhao–Lankao high-speed railway at Heze, China, between 2015 and 2019 with Sentinel-1 data
Chuanguang Zhu et al.
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No articles found.
Junfeng Wei, Shiyin Liu, Te Zhang, Xin Wang, Yong Zhang, Zongli Jiang, Kunpeng Wu, and Zheng Zhang
The Cryosphere Discuss., https://doi.org/10.5194/tc-2019-259, https://doi.org/10.5194/tc-2019-259, 2020
Preprint withdrawn
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During the past three decades, Longbasaba Glacier has experienced a continuous and accelerating recession in glacier area and length but accompanied by the decelerating surface lowing and ice flow. The glacier surface lowering played a predominant role in the mass contribution of glacier shrinkage to the increase in lake water volume, while ice avalanches were the main potential trigger for failure of moraine dams and subsequent GLOF events.
Zhen Zhang, Shiyin Liu, Zongli Jiang, Donghui Shangguan, Junfeng Wei, Wanqin Guo, Junli Xu, Yong Zhang, and Danni Huang
The Cryosphere Discuss., https://doi.org/10.5194/tc-2019-94, https://doi.org/10.5194/tc-2019-94, 2019
Preprint withdrawn
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We present an integrated view of the glacier area and its mass changes for Mt. Xinqingfeng and Mt. Malan of the inner Tibetan Plateau as derived from topographic maps, Landsat, ASTER, SRTM DEM, and TerraSAR-X/TanDEM-X for the period of 1970–2012 and 1970–2018, respectively. The glaciers experienced weak shrinkage and slight negative mass balance. The Monuomaha Glacier and Zu Glacier together with another 5 glaciers displayed the surging or advancing characteristics during the observation period.
Kunpeng Wu, Shiyin Liu, Zongli Jiang, Junli Xu, and Junfeng Wei
The Cryosphere Discuss., https://doi.org/10.5194/tc-2018-90, https://doi.org/10.5194/tc-2018-90, 2018
Revised manuscript not accepted
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This study presents diminishing ice cover in the central Nyainqentanglha Range by 0.68 % ± 0.05 % a−1, and a mean mass deficit of 0.46 % ± 0.04 m w.e. a−1 since 1968. Mass losses accelerating from 0.42 % ± 0.05 m w.e. a−1 to 0.60 % ± 0.20 m w.e. a−1 during 1968–2000 and 2000–~2013, with thinning noticeably greater on the debris-covered ice than the clean ice. Surface-elevation changes can be influenced by ice cliffs, as well as debris cover, and land- or lake-terminating glaciers and supraglacial lakes.
Sanaz Vajedian and Mahdi Motagh
ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci., IV-3, 205–209, https://doi.org/10.5194/isprs-annals-IV-3-205-2018, https://doi.org/10.5194/isprs-annals-IV-3-205-2018, 2018
Kunpeng Wu, Shiyin Liu, Zongli Jiang, Junli Xu, Junfeng Wei, and Wanqin Guo
The Cryosphere, 12, 103–121, https://doi.org/10.5194/tc-12-103-2018, https://doi.org/10.5194/tc-12-103-2018, 2018
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This study presents diminishing ice cover in the Kangri Karpo Mountains by 24.9 % ± 2.2 % or 0.71 % ± 0.06 % a−1 from 1980 to 2015 but with nine glaciers advancing. By utilizing geodetic methods, glaciers have experienced a mean mass deficit of 0.46 ± 0.08 m w.e. a−1 from 1980 to 2014. These glaciers showed slight accelerated shrinkage and significant accelerated mass loss during 2000–2015 compared to that during 1980–2000, which is consistent with the tendency of climate warming.
Related subject area
Other Hazards (e.g., Glacial and Snow Hazards, Karst, Wildfires Hazards, and Medical Geo-Hazards)
Examining the operational use of avalanche problems with decision trees and model-generated weather and snowpack variables
A classification scheme to determine wildfires from the satellite record in the cool grasslands of southern Canada: considerations for fire occurrence modelling and warning criteria
Tailings-flow runout analysis: examining the applicability of a semi-physical area–volume relationship using a novel database
Experimental assessment of the relationship between rainfall intensity and sinkholes caused by damaged sewer pipes
Non-stationary extreme value analysis of ground snow loads in the French Alps: a comparison with building standards
Sensitivity of modeled snow stability data to meteorological input uncertainty
Synoptic atmospheric circulation patterns associated with deep persistent slab avalanches in the western United States
Fire Weather Index: the skill provided by the European Centre for Medium-Range Weather Forecasts ensemble prediction system
A regional spatio-temporal analysis of large magnitude snow avalanches using tree rings
The 1958 Lituya Bay tsunami – pre-event bathymetry reconstruction and 3D numerical modelling utilising the computational fluid dynamics software Flow-3D
On snow stability interpretation of extended column test results
Snow avalanche detection and mapping in multitemporal and multiorbital radar images from TerraSAR-X and Sentinel-1
Evolution of a pyrocumulonimbus event associated with an extreme wildfire in Tasmania, Australia
Evaluation of Global Fire Weather Database reanalysis and short-term forecast products
Satellite hydrology observations as operational indicators of forecasted fire danger across the contiguous United States
Evolution of surface deformation related to salt extraction-caused sinkholes in Solotvyno (Ukraine) revealed by Sentinel-1 radar interferometry
Quantifying seasonal cornice dynamics using a terrestrial laser scanner in Svalbard, Norway
Wildfire ignition probability in Belgium
Snow gliding and glide-snow avalanches: recent outcomes from two experimental test sites in Aosta Valley (northwestern Italian Alps)
The first version of the Pan-European Indoor Radon Map
Stability charts based on the finite element method for underground cavities in soft carbonate rocks: validation through case-study applications
Exploring the relationship between avalanche hazard and run list terrain choices at a helicopter skiing operation
Three-dimensional inverse modeling of EM-LIN data for the exploration of coastal sinkholes in Quintana Roo, Mexico
Wildland fire potential outlooks for Portugal using meteorological indices of fire danger
Contrasting large fire activity in the French Mediterranean
Simulating the effects of weather and climate on large wildfires in France
A method of deriving operation-specific ski run classes for avalanche risk management decisions in mechanized skiing
Using cellular automata to simulate wildfire propagation and to assist in fire management
Automated snow avalanche release area delineation – validation of existing algorithms and proposition of a new object-based approach for large-scale hazard indication mapping
Brief Communication: Measuring rock decelerations and rotation changes during short-duration ground impacts
Impact of wildfires on Canada's oil sands facilities
Spatial consistency and bias in avalanche forecasts – a case study in the European Alps
Has fire policy decreased the return period of the largest wildfire events in France? A Bayesian assessment based on extreme value theory
Communicating public avalanche warnings – what works?
Growth of a sinkhole in a seismic zone of the northern Apennines (Italy)
Stability assessment of roadbed affected by ground subsidence adjacent to urban railways
New experimental diagnostics in combustion of forest fuels: microscale appreciation for a macroscale approach
Determining the drivers for snow gliding
The effects of gravel cushion particle size and thickness on the coefficient of restitution in rockfall impacts
Global assessment of rural–urban interface in Portugal related to land cover changes
Estimating grassland curing with remotely sensed data
Dynamics of avalanche-generated impulse waves: three-dimensional hydrodynamic simulations and sensitivity analysis
Assessing the interaction between mountain forests and snow avalanches at Nevados de Chillán, Chile and its implications for ecosystem-based disaster risk reduction
Combination of UAV and terrestrial photogrammetry to assess rapid glacier evolution and map glacier hazards
Large drainages from short-lived glacial lakes in the Teskey Range, Tien Shan Mountains, Central Asia
Modeling anthropogenic and natural fire ignitions in an inner-alpine valley
Modeling the influence of snow cover temperature and water content on wet-snow avalanche runout
Extreme wildfire events are linked to global-change-type droughts in the northern Mediterranean
GLOFs in the WOS: bibliometrics, geographies and global trends of research on glacial lake outburst floods (Web of Science, 1979–2016)
Dynamic magnification factors for tree blow-down by powder snow avalanche air blasts
Simon Horton, Moses Towell, and Pascal Haegeli
Nat. Hazards Earth Syst. Sci., 20, 3551–3576, https://doi.org/10.5194/nhess-20-3551-2020, https://doi.org/10.5194/nhess-20-3551-2020, 2020
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We investigate patterns in how avalanche forecasters characterize snow avalanche hazard with avalanche problem types. Decision tree analysis was used to investigate both physical influences based on weather and on snowpack variables and operational practices. The results highlight challenges with developing decision aids based on previous hazard assessments.
Dan K. Thompson and Kimberly Morrison
Nat. Hazards Earth Syst. Sci., 20, 3439–3454, https://doi.org/10.5194/nhess-20-3439-2020, https://doi.org/10.5194/nhess-20-3439-2020, 2020
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We describe critically low relative humidity and high wind speeds above which only documented wildfires were seen to occur and where no agricultural fires were documented in southern Canada. We then applied these thresholds to the much larger satellite record from 2002–2018 to quantify regional differences in both the rate of observed burning and the number of days with critical weather conditions to sustain a wildfire in this grassland and agricultural region.
Negar Ghahramani, Andrew Mitchell, Nahyan M. Rana, Scott McDougall, Stephen G. Evans, and W. Andy Take
Nat. Hazards Earth Syst. Sci., 20, 3425–3438, https://doi.org/10.5194/nhess-20-3425-2020, https://doi.org/10.5194/nhess-20-3425-2020, 2020
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Tailings flows result from the breach of tailings dams. These flows contain waste products of the mineral processing operations and can travel substantial distances, causing significant loss of life, environmental damage, and economic costs. This paper establishes a new tailings-flow runout classification system, describes a new database of events that have been mapped in detail using the new system, and examines the applicability of a semi-physical area–volume relationship using the new data.
Tae-Young Kwak, Sang-Inn Woo, Choong-Ki Chung, and Joonyoung Kim
Nat. Hazards Earth Syst. Sci., 20, 3343–3359, https://doi.org/10.5194/nhess-20-3343-2020, https://doi.org/10.5194/nhess-20-3343-2020, 2020
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In this study, model tests were used to analyze the effects of rainfall intensity on the formation of the eroded zone and the occurrence of sinkholes due to groundwater infiltration through pipe defects. The model tests were conducted to simulate the actual site conditions considering the soil used around sewer pipe networks and the sewer pipe landfill standards. The groundwater level was applied to the model tests by setting three hydraulic heads based on heavy-rainfall characteristics.
Erwan Le Roux, Guillaume Evin, Nicolas Eckert, Juliette Blanchet, and Samuel Morin
Nat. Hazards Earth Syst. Sci., 20, 2961–2977, https://doi.org/10.5194/nhess-20-2961-2020, https://doi.org/10.5194/nhess-20-2961-2020, 2020
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To minimize the risk of structure collapse due to extreme snow loads, structure standards rely on 50-year return levels of ground snow load (GSL), i.e. levels exceeded once every 50 years on average, that do not account for climate change. We study GSL data in the French Alps massifs from 1959 and 2019 and find that these 50-year return levels are decreasing with time between 900 and 4800 m of altitude, but they still exceed return levels of structure standards for half of the massifs at 1800 m.
Bettina Richter, Alec van Herwijnen, Mathias W. Rotach, and Jürg Schweizer
Nat. Hazards Earth Syst. Sci., 20, 2873–2888, https://doi.org/10.5194/nhess-20-2873-2020, https://doi.org/10.5194/nhess-20-2873-2020, 2020
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We investigated the sensitivity of modeled snow instability to uncertainties in meteorological input, typically found in complex terrain. The formation of the weak layer was very robust due to the long dry period, indicated by a widespread avalanche problem. Once a weak layer has formed, precipitation mostly determined slab and weak layer properties and hence snow instability. When spatially assessing snow instability for avalanche forecasting, accurate precipitation patterns have to be known.
Andrew R. Schauer, Jordy Hendrikx, Karl W. Birkeland, and Cary J. Mock
Nat. Hazards Earth Syst. Sci. Discuss., https://doi.org/10.5194/nhess-2020-302, https://doi.org/10.5194/nhess-2020-302, 2020
Revised manuscript accepted for NHESS
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Our research links upper-atmospheric circulation patterns to a destructive and difficult to predict type of snow avalanche in the western United States. At each of our study sites, we find unique circulation patterns that tend to occur in the beginning of the winter season during years with major avalanche activity. We also find specific patterns that occur frequently in the days leading to major avalanche events. This work will enable practitioners to better anticipate these challenging events.
Francesca Di Giuseppe, Claudia Vitolo, Blazej Krzeminski, Christopher Barnard, Pedro Maciel, and Jesús San-Miguel
Nat. Hazards Earth Syst. Sci., 20, 2365–2378, https://doi.org/10.5194/nhess-20-2365-2020, https://doi.org/10.5194/nhess-20-2365-2020, 2020
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Forecasting of daily fire weather indices driven by the ECMWF ensemble prediction system is shown to have a good skill up to 10 d ahead in predicting flammable conditions in most regions of the world. The availability of these forecasts through the Copernicus Emergency Management Service can extend early warnings by up to 1–2 weeks, allowing for greater proactive coordination of resource-sharing and mobilization within and across countries.
Erich Peitzsch, Jordy Hendrikx, Daniel Stahle, Gregory Pederson, Karl Birkeland, and Daniel Fagre
Nat. Hazards Earth Syst. Sci. Discuss., https://doi.org/10.5194/nhess-2020-253, https://doi.org/10.5194/nhess-2020-253, 2020
Revised manuscript accepted for NHESS
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We sampled 647 trees from 12 avalanche paths to investigate large snow avalanches over the past 400 years in the northern Rocky Mountains, USA. Sizable avalanches occur approximately every three years across the region. Our results emphasize the importance of sample size, scale, and spatial extent when reconstructing avalanche occurrence across a region. This work can be used for infrastructure planning and avalanche forecasting operations.
Andrea Franco, Jasper Moernaut, Barbara Schneider-Muntau, Michael Strasser, and Bernhard Gems
Nat. Hazards Earth Syst. Sci., 20, 2255–2279, https://doi.org/10.5194/nhess-20-2255-2020, https://doi.org/10.5194/nhess-20-2255-2020, 2020
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This study highlights the use of the software Flow-3D in reproducing landslide-generated impulse waves. Due to the available data and the possibility of comparing the results with other previous works, a numerical modelling investigation on the 1958 Lituya Bay tsunami event is proposed. It is noted that the rockslide impact into the waterbody has a key role in the wave initiation and thus its propagation. The concept used in this work can be applied to prevent such phenomena in future.
Frank Techel, Kurt Winkler, Matthias Walcher, Alec van Herwijnen, and Jürg Schweizer
Nat. Hazards Earth Syst. Sci., 20, 1941–1953, https://doi.org/10.5194/nhess-20-1941-2020, https://doi.org/10.5194/nhess-20-1941-2020, 2020
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Snow instability tests, like the extended column test (ECT), provide valuable information regarding point snow instability. A large data set of ECT – together with information on slope instability – was explored. The findings clearly show that combining information regarding propagation propensity and fracture initiation provided the best correlation with slope instability. A new four-class stability interpretation scheme is proposed for ECT results.
Silvan Leinss, Raphael Wicki, Sämi Holenstein, Simone Baffelli, and Yves Bühler
Nat. Hazards Earth Syst. Sci., 20, 1783–1803, https://doi.org/10.5194/nhess-20-1783-2020, https://doi.org/10.5194/nhess-20-1783-2020, 2020
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To assess snow avalanche mapping with radar satellites in Switzerland, we compare 2 m resolution TerraSAR-X images, 10 m resolution Sentinel-1 images, and optical 1.5 m resolution SPOT-6 images. We found that radar satellites provide a valuable option to map at least larger avalanches, though avalanches are mapped only partially. By combining multiple orbits and polarizations from S1, we achieved mapping results of quality almost comparable to single high-resolution TerraSAR-X images.
Mercy N. Ndalila, Grant J. Williamson, Paul Fox-Hughes, Jason Sharples, and David M. J. S. Bowman
Nat. Hazards Earth Syst. Sci., 20, 1497–1511, https://doi.org/10.5194/nhess-20-1497-2020, https://doi.org/10.5194/nhess-20-1497-2020, 2020
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We analyse the evolution of a pyrocumulonimbus (pyroCb), or fire-induced thunderstorm, during the Forcett–Dunalley fire on 4 January 2013 and relate it to the prevailing fire weather and fire severity patterns. We show that the pyroCb reached an altitude of 15 km, was associated with elevated fire weather, and formed over a severely burned area. Additionally, we show that eastern Tasmania is prone to elevated fire weather which has implications for fire weather forecasting and fire management.
Robert D. Field
Nat. Hazards Earth Syst. Sci., 20, 1123–1147, https://doi.org/10.5194/nhess-20-1123-2020, https://doi.org/10.5194/nhess-20-1123-2020, 2020
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This paper compares fire weather indices calculated from the NASA MERRA-2 reanlaysis to those calculated from a global network of weather stations, finding that, globally, biases in reanalysis fire weather are influenced firstly by temperature and relative humidity and, in certain regions, by precipitation biases. Fire weather forecasts using short-term NASA GEOS-5 weather forecasts are skillful 2 d ahead of time. This skill decreases more quickly with longer lead times at high latitudes.
Alireza Farahmand, E. Natasha Stavros, John T. Reager, Ali Behrangi, James T. Randerson, and Brad Quayle
Nat. Hazards Earth Syst. Sci., 20, 1097–1106, https://doi.org/10.5194/nhess-20-1097-2020, https://doi.org/10.5194/nhess-20-1097-2020, 2020
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Wildfires result in billions of dollars of losses each year. Most wildfire predictions have a 10 d lead-time. This study introduces a framework for a 1-month lead-time prediction of wildfires based on vapor pressure deficit and surface soil moisture in the US. The results show that the model can successfully predict burned area with relatively small margins of error. This is especially important for operational wildfire management such as national resource allocation.
Eszter Szűcs, Sándor Gönczy, István Bozsó, László Bányai, Alexandru Szakacs, Csilla Szárnya, and Viktor Wesztergom
Nat. Hazards Earth Syst. Sci. Discuss., https://doi.org/10.5194/nhess-2020-84, https://doi.org/10.5194/nhess-2020-84, 2020
Preprint under review for NHESS
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Sinkhole formation and post-collapse deformation in Solotvyno salt mining area was studied where the salt dissolution due to water intrusion poses a significant risk. Based on Sentinel-1 data set remarkable surface deformation with a maximum rate of 5 cm/yr was revealed and it was demonstrated that the deformation process has a linear characteristic although the mining activity was ended more than 10 years ago.
Holt Hancock, Markus Eckerstorfer, Alexander Prokop, and Jordy Hendrikx
Nat. Hazards Earth Syst. Sci., 20, 603–623, https://doi.org/10.5194/nhess-20-603-2020, https://doi.org/10.5194/nhess-20-603-2020, 2020
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This work uses terrestrial laser scanning techniques to monitor and quantify changes to snow cornices near Longyearbyen, Svalbard, Norway, with sub-decimeter accuracy. Our findings illustrate how complex interactions between topography and meteorological conditions govern the growth, failure, and associated avalanche activity of the cornices in this location. These findings can help improve forecasting of snow-cornice-related hazards in this and other locations exposed to snow cornice hazards.
Arthur Depicker, Bernard De Baets, and Jan Marcel Baetens
Nat. Hazards Earth Syst. Sci., 20, 363–376, https://doi.org/10.5194/nhess-20-363-2020, https://doi.org/10.5194/nhess-20-363-2020, 2020
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In recent years, several valuable nature reserves in Belgium have been severely damaged by wildfires. In order to optimize risk management and prepare for a possibly increasing number of such events, the first wildfire ignition probability map is developed for Belgium, based on data that were obtained from the government and newspaper articles. We find that most ignitions occur in the provinces of Limburg and Antwerp and that most causes are of anthropogenic nature (such as military exercises).
Margherita Maggioni, Danilo Godone, Barbara Frigo, and Michele Freppaz
Nat. Hazards Earth Syst. Sci., 19, 2667–2676, https://doi.org/10.5194/nhess-19-2667-2019, https://doi.org/10.5194/nhess-19-2667-2019, 2019
Javier Elío, Giorgia Cinelli, Peter Bossew, José Luis Gutiérrez-Villanueva, Tore Tollefsen, Marc De Cort, Alessio Nogarotto, and Roberto Braga
Nat. Hazards Earth Syst. Sci., 19, 2451–2464, https://doi.org/10.5194/nhess-19-2451-2019, https://doi.org/10.5194/nhess-19-2451-2019, 2019
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The first version of the Pan-European Indoor Radon Map is presented in this article. The map has been developed using summary statistics estimated from 1.2 million samples. It represents an average radon concentration per 10 km x 10 km grid cell under the assumption that there are dwellings in the grid cell. It is a major contribution to the understanding of the exposure to ionizing radiation of Europeans and a first step towards a European radon exposure and, in the future, radon dose map.
Michele Perrotti, Piernicola Lollino, Nunzio Luciano Fazio, and Mario Parise
Nat. Hazards Earth Syst. Sci., 19, 2079–2095, https://doi.org/10.5194/nhess-19-2079-2019, https://doi.org/10.5194/nhess-19-2079-2019, 2019
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Based on stability charts proposed by Perrotti et al. (2018), preliminary assessment of stability/instability of underground quarries in soft carbonate rocks is discussed with reference to six case studies of underground artificial cavities, including three affected by sinkhole failures in the past and three in stable conditions at present. When underground quarries are suitably surveyed and mapped, a quantitative assessment of the stability conditions is possible.
Reto Sterchi, Pascal Haegeli, and Patrick Mair
Nat. Hazards Earth Syst. Sci., 19, 2011–2026, https://doi.org/10.5194/nhess-19-2011-2019, https://doi.org/10.5194/nhess-19-2011-2019, 2019
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Mechanized skiing operations use an established process to select skiing terrain with a low risk level. However, the relationship between appropriate skiing terrain and avalanche conditions has only received limited research attention. Our study examines this relationship numerically for the first time and shows the effects of avalanche hazard, previous skiing, and previous acceptability on different types of skiing terrain and offers the foundation to develop evidence-based decision tools.
Marco A. Perez-Flores, Luis E. Ochoa-Tinajero, and Almendra Villela y Mendoza
Nat. Hazards Earth Syst. Sci., 19, 1779–1787, https://doi.org/10.5194/nhess-19-1779-2019, https://doi.org/10.5194/nhess-19-1779-2019, 2019
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In this paper we present an EM geophysics method designed for shallow purposes for determining the 3-D geometry of a sinkhole. In this case we are applying the technique for the Chac-Mool sinkhole in the Yucatán Peninsula. Thanks to scuba divers we have a broad path they followed along the subterranean rivers. Our 3-D model can be correlated with those scuba diver paths. We also found hidden rivers that pass very close to the surface (less than 10 m) making these areas susceptible to collapse.
Sílvia A. Nunes, Carlos C. DaCamara, Kamil F. Turkman, Teresa J. Calado, Ricardo M. Trigo, and Maria A. A. Turkman
Nat. Hazards Earth Syst. Sci., 19, 1459–1470, https://doi.org/10.5194/nhess-19-1459-2019, https://doi.org/10.5194/nhess-19-1459-2019, 2019
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Portugal is recurrently affected by large wildfire events. We present a statistical model to estimate the probability that the summer burned area exceeds a given threshold. The model allows making outlooks of wildfire potential with up to 1 month in advance of the fire season. When applied to the 39-year period 1980-2018, only 1 severe (one weak) year is not anticipated as potentially severe (weak). The model will assist the fire community when planning prevention and combating fire events.
Anne Ganteaume and Renaud Barbero
Nat. Hazards Earth Syst. Sci., 19, 1055–1066, https://doi.org/10.5194/nhess-19-1055-2019, https://doi.org/10.5194/nhess-19-1055-2019, 2019
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Long-term georeferenced time series showed spatiotemporal variations in large fires (LF ≥ 100 ha) throughout the French Mediterranean with 21 % of the total LF burned area occurring on surface previously burned. The region was impacted up to five to six times by recurrent LFs, the east experiencing fewer but larger LFs despite fire weather conditions decreasing eastwards. The efficiency of fire management has improved but LF outbreaks during extreme weather conditions remain a major concern.
Renaud Barbero, Thomas Curt, Anne Ganteaume, Eric Maillé, Marielle Jappiot, and Adeline Bellet
Nat. Hazards Earth Syst. Sci., 19, 441–454, https://doi.org/10.5194/nhess-19-441-2019, https://doi.org/10.5194/nhess-19-441-2019, 2019
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We developed statistical models simulating the probability of large wildfires in France from the climate forcing. The models were able to reproduce both spatial and temporal variability in large wildfires across different environmental regions. The models have wide applications, including improving our understanding of the drivers of large wildfires over the historical period and providing a basis on which to estimate future changes to large wildfires from climate projections.
Reto Sterchi and Pascal Haegeli
Nat. Hazards Earth Syst. Sci., 19, 269–285, https://doi.org/10.5194/nhess-19-269-2019, https://doi.org/10.5194/nhess-19-269-2019, 2019
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We used a revealed preference approach and identified patterns in risk management decisions of mechanized skiing operations. Our results show that terrain choices of experienced guides depend on a much broader set of factors beyond just the avalanche hazard, including skiing experience or accessibility due to weather. The identified high-resolution ski run hierarchies provide new opportunities for examining professional avalanche risk management practices and developing meaningful decision aids.
Joana Gouveia Freire and Carlos Castro DaCamara
Nat. Hazards Earth Syst. Sci., 19, 169–179, https://doi.org/10.5194/nhess-19-169-2019, https://doi.org/10.5194/nhess-19-169-2019, 2019
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Cellular automata are useful tools to simulate wildfire propagation. We design a cellular automaton to simulate a severe wildfire that took place in Portugal in 2012 and resulted in almost 25 000 ha burned. The explosive stage is adequately modeled when refining the role played by the wind in fire spreading. Results show a probability of ignition out of the limits of the observed scar, information that may help choose where to allocate resources for firefighting.
Yves Bühler, Daniel von Rickenbach, Andreas Stoffel, Stefan Margreth, Lukas Stoffel, and Marc Christen
Nat. Hazards Earth Syst. Sci., 18, 3235–3251, https://doi.org/10.5194/nhess-18-3235-2018, https://doi.org/10.5194/nhess-18-3235-2018, 2018
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Coping with avalanche hazard has a long tradition in alpine countries. Hazard mapping has proven to be one of the most effective methods. In this paper we develop a new approach to automatically delineate avalanche release areas and connect them to state-of-the-art numerical avalanche simulations. This enables computer-based hazard indication mapping over large areas such as entire countries. This is of particular interest where hazard maps do not yet exist, such as in developing countries.
Andrin Caviezel and Werner Gerber
Nat. Hazards Earth Syst. Sci., 18, 3145–3151, https://doi.org/10.5194/nhess-18-3145-2018, https://doi.org/10.5194/nhess-18-3145-2018, 2018
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Anticipating the flight path of a bouncing object holds fascination for playing children and scientists alike. While the path of a ball can be judged easily, the erratic rebound behavior of complexly shaped forms are intriguing. Here, we focus on the timescales and rotation changes during real rock–ground impacts while traveling down a slope. Specialized sensors inside the rock track those changes and reveal contact times in the millisecond range defining the overall flight path behavior.
Nima Khakzad
Nat. Hazards Earth Syst. Sci., 18, 3153–3166, https://doi.org/10.5194/nhess-18-3153-2018, https://doi.org/10.5194/nhess-18-3153-2018, 2018
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The growing oil sands operations in Canada's wildlands on the one hand and an anticipated increase in the frequency of wildfires, due to global warming, on the other hand can jeopardize the safety and integrity of oil sands facilities. The present study aims to develop a methodology, based on the Canadian Wildland Fire Information System and quantitative risk assessment techniques, for assessing the impact of wildfires on wildland–industrial interfaces with an emphasis on oil sands facilities.
Frank Techel, Christoph Mitterer, Elisabetta Ceaglio, Cécile Coléou, Samuel Morin, Francesca Rastelli, and Ross S. Purves
Nat. Hazards Earth Syst. Sci., 18, 2697–2716, https://doi.org/10.5194/nhess-18-2697-2018, https://doi.org/10.5194/nhess-18-2697-2018, 2018
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In 1993, the European Avalanche Warning Services agreed upon a common danger scale to describe the regional avalanche hazard: the European Avalanche Danger Scale. Using published avalanche forecasts, we explored whether forecasters use the scale consistently. We noted differences in the use of the danger levels, some of which could be linked to the size of the regions a regional danger level is issued for. We recommend further harmonizing the avalanche forecast products in the Alps.
Guillaume Evin, Thomas Curt, and Nicolas Eckert
Nat. Hazards Earth Syst. Sci., 18, 2641–2651, https://doi.org/10.5194/nhess-18-2641-2018, https://doi.org/10.5194/nhess-18-2641-2018, 2018
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Very large wildfires have high human, economic, and ecological impacts. Preventing such events is a major objective of the new fire policy set up in France in 1994, which is oriented towards fast and massive fire suppression. This study investigates the effect of this policy on the largest fires. We estimate the burned area corresponding to fires that occur every 5, 20, and 50 years on average (so-called return periods) in southern France.
Rune V. Engeset, Gerit Pfuhl, Markus Landrø, Andrea Mannberg, and Audun Hetland
Nat. Hazards Earth Syst. Sci., 18, 2537–2559, https://doi.org/10.5194/nhess-18-2537-2018, https://doi.org/10.5194/nhess-18-2537-2018, 2018
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The Norwegian Avalanche Warning Service was launched in 2013 to stop the increase in avalanche fatalities. We studied how efficiently warnings communicate the hazard on Varsom.no: which risk factors are difficult to assess and manage? Which elements in the warning are (not) important? Which elements are easily misunderstood? Which information/features are missing/ignored by users? We developed a communication effectiveness score for testing this using an online survey.
Alessandro La Rosa, Carolina Pagli, Giancarlo Molli, Francesco Casu, Claudio De Luca, Amerino Pieroni, and Giacomo D'Amato Avanzi
Nat. Hazards Earth Syst. Sci., 18, 2355–2366, https://doi.org/10.5194/nhess-18-2355-2018, https://doi.org/10.5194/nhess-18-2355-2018, 2018
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We use a multi-disciplinary dataset to show that the Prà di Lama sinkhole was created through several episodic events of unrest. We suggest that fluid circulation along an active fault zone, accompanied by localized seismic creep, control the growth of the Prà di Lama deep-sited sinkhole. Conversely, a connection between events of unrest and the largest earthquakes in northern Tuscany is not identified. This paper provides new insights into the evolution of sinkholes in active fault zones.
Sang-Soo Jeon, Young-Kon Park, and Ki-Young Eum
Nat. Hazards Earth Syst. Sci., 18, 2261–2271, https://doi.org/10.5194/nhess-18-2261-2018, https://doi.org/10.5194/nhess-18-2261-2018, 2018
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The number of occurrences of ground subsidence induced by a leakage of aged pipelines for water and sewage in urban areas resulting in various sizes of cavity near the urban railway in South Korea has increased and it may cause roadbed settlement to exceed the allowable value. In this study, a three-dimensional numerical analysis is carried out to estimate roadbed stability and its risk level associated with various groundwater levels and sizes of cavities in simulated ground conditions.
Dominique Cancellieri, Valérie Leroy-Cancellieri, Xavier Silvani, and Frédéric Morandini
Nat. Hazards Earth Syst. Sci., 18, 1957–1968, https://doi.org/10.5194/nhess-18-1957-2018, https://doi.org/10.5194/nhess-18-1957-2018, 2018
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The technology presented in this paper is based on a completely new approach wherein the development of a new field mass loss device combined with recent progress in the understanding of its behaviour achieves never before recorded data. It is the first time that the kinetics of decomposition of biomass have been validated under real wildland fire conditions, thus ensuring reliable characterisation of source terms.
Reinhard Fromm, Sonja Baumgärtner, Georg Leitinger, Erich Tasser, and Peter Höller
Nat. Hazards Earth Syst. Sci., 18, 1891–1903, https://doi.org/10.5194/nhess-18-1891-2018, https://doi.org/10.5194/nhess-18-1891-2018, 2018
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Snow gliding is a key factor for snow glide avalanche formation and soil erosion. This study considers atmospheric and snow variables, vegetation characteristics, and soil properties, and determines their relevance for snow gliding. The soil moisture, the soil temperature, the liquid water content of snow, the phytomass of mosses, and the friction coefficient have major influence.
However, further investigations may be focused on the freezing and melting processes in the uppermost soil layers.
Chun Zhu, Dongsheng Wang, Xing Xia, Zhigang Tao, Manchao He, and Chen Cao
Nat. Hazards Earth Syst. Sci., 18, 1811–1823, https://doi.org/10.5194/nhess-18-1811-2018, https://doi.org/10.5194/nhess-18-1811-2018, 2018
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Gravel cushions are widely used for rockfall prevention in open-pit mines to absorb energy; the energy-consumption and buffer mechanism of different thicknesses and particle sizes of gravel cushions under the impact effects are studied. A series of laboratory tests for different cushions are conducted, combining the blocks' volume and drop height. It provides a theoretical and practical basis for the wide application of cushion design to control rockfall.
Marj Tonini, Joana Parente, and Mário G. Pereira
Nat. Hazards Earth Syst. Sci., 18, 1647–1664, https://doi.org/10.5194/nhess-18-1647-2018, https://doi.org/10.5194/nhess-18-1647-2018, 2018
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We assessed the evolution of the rural–urban interface (RUI) in Portugal based on land cover changes. A significant increase in artificial surfaces was registered near the main metropolitan communities, whilst the abandonment of agricultural land near the inland urban areas led to an increase in uncultivated semi-natural areas. Consequently, RUI increased more than two-thirds and burnt areas within the RUI doubled, emphasizing the importance of RUI monitoring for land and fire managers.
Wasin Chaivaranont, Jason P. Evans, Yi Y. Liu, and Jason J. Sharples
Nat. Hazards Earth Syst. Sci., 18, 1535–1554, https://doi.org/10.5194/nhess-18-1535-2018, https://doi.org/10.5194/nhess-18-1535-2018, 2018
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This study explore the feasibility of using a combination of recent and traditional satellite products to estimate the grassland fire fuel availability across space and time over Australia. We found a significant relationship between both recent and traditional satellite products and observed grassland fuel availability and develop an estimation model. We hope our estimation model will provide a more balanced alternative to the currently available grass fuel availability estimation models.
Rachel E. Chisolm and Daene C. McKinney
Nat. Hazards Earth Syst. Sci., 18, 1373–1393, https://doi.org/10.5194/nhess-18-1373-2018, https://doi.org/10.5194/nhess-18-1373-2018, 2018
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This paper studies the lake dynamics for avalanche-triggered glacial lake outburst floods (GLOFs) in the Cordillera Blanca mountain range in Ancash, Peru. Lake Palcacocha is used as a case study to analyze the upper watershed processes that typically comprise a GLOF event, specifically the lake dynamics when an avalanche produces a large displacement wave that might overtop and erode the lake-damming moraine.
Alejandro Casteller, Thomas Häfelfinger, Erika Cortés Donoso, Karen Podvin, Dominik Kulakowski, and Peter Bebi
Nat. Hazards Earth Syst. Sci., 18, 1173–1186, https://doi.org/10.5194/nhess-18-1173-2018, https://doi.org/10.5194/nhess-18-1173-2018, 2018
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Natural hazards such as snow avalanches, debris flows and volcanic activity represent a risk to mountain communities. This is particularly the case where documentary records about these processes are rare. As a result, decisions on risk management and land-use planning are based on other sources such tree-ring data and process models. Our study was conducted at Valle Las Trancas in Chile, where we evaluated the dynamics of avalanches and other natural hazards which threaten its population.
Davide Fugazza, Marco Scaioni, Manuel Corti, Carlo D'Agata, Roberto Sergio Azzoni, Massimo Cernuschi, Claudio Smiraglia, and Guglielmina Adele Diolaiuti
Nat. Hazards Earth Syst. Sci., 18, 1055–1071, https://doi.org/10.5194/nhess-18-1055-2018, https://doi.org/10.5194/nhess-18-1055-2018, 2018
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This paper describes the surveys we performed in 2014 and 2016 by means of UAVs and terrestrial photogrammetry to monitor the Forni Glacier, one of the largest glaciers in the Italian Alps. We investigated the hazards related to the glacier collapse, which have been increasing recently due to the high ice melting rate. Our approach is feasible and low cost and we will repeatedly monitor the glacier to provide rapid hazard detection services to help the tourism sector.
Chiyuki Narama, Mirlan Daiyrov, Murataly Duishonakunov, Takeo Tadono, Hayato Sato, Andreas Kääb, Jinro Ukita, and Kanatbek Abdrakhmatov
Nat. Hazards Earth Syst. Sci., 18, 983–995, https://doi.org/10.5194/nhess-18-983-2018, https://doi.org/10.5194/nhess-18-983-2018, 2018
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Four large drainages from glacial lakes occurred during 2006–2014 in the western Teskey Range, Kyrgyzstan. These floods caused extensive damage, killing people and livestock, as well as destroying property and crops. Due to their subsurface outlet, we refer to these short-lived glacial lakes as being of the
tunnel-type, a type that drastically grows and drains over a few months.
Giorgio Vacchiano, Cristiano Foderi, Roberta Berretti, Enrico Marchi, and Renzo Motta
Nat. Hazards Earth Syst. Sci., 18, 935–948, https://doi.org/10.5194/nhess-18-935-2018, https://doi.org/10.5194/nhess-18-935-2018, 2018
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Here we show that wildland fires in an Italian alpine region are ignited mainly by human negligence. 30 % of fires stars in agricultural areas, 24 % in forests. Lightning plays a role in 10 % of the cases, but its importance has been increasing recently. Areas under hot, dry climate are more prone to fire. Cattle grazing reduces the fuel for winter fires, but increases ignition risk in summer. The maps of fire risk that we produce can help to support fire prevention and ecosystem management.
Cesar Vera Valero, Nander Wever, Marc Christen, and Perry Bartelt
Nat. Hazards Earth Syst. Sci., 18, 869–887, https://doi.org/10.5194/nhess-18-869-2018, https://doi.org/10.5194/nhess-18-869-2018, 2018
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Snow avalanche motion is strongly dependent on the temperature and water content of the snow cover. In this paper we use a snow cover model, driven by measured meteorological data, to set the initial and boundary conditions for wet-snow avalanche calculations. The snow cover model provides estimates of snow depth, density, temperature and liquid water content. These initial conditions are used to drive an avalanche dynamics model. The runout results are compared using a contigency analysis.
Julien Ruffault, Thomas Curt, Nicolas K. Martin-StPaul, Vincent Moron, and Ricardo M. Trigo
Nat. Hazards Earth Syst. Sci., 18, 847–856, https://doi.org/10.5194/nhess-18-847-2018, https://doi.org/10.5194/nhess-18-847-2018, 2018
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Extreme wildfires events (EWE) have been recorded during the past year in the Mediterranean. By analyzing the climatic conditions associated with the French 2003 and 2016 fires seasons, we found that EWE were associated to two distinct climatic events whose frequencies are both expected to increase with global changes: hot droughts and long droughts. These results suggest that EWE are likely to become more common in the future and will certainly challenge fire management.
Adam Emmer
Nat. Hazards Earth Syst. Sci., 18, 813–827, https://doi.org/10.5194/nhess-18-813-2018, https://doi.org/10.5194/nhess-18-813-2018, 2018
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This study focuses on bibliometrics, geographies and global trends of research on glacial lake outburst floods (GLOFs). It shows how research on GLOFs has become topical over the past few decades (analysed period: 1979–2016). Issues such as (i) where GLOFs are studied, (ii) who studies GLOFs, (iii) the export of research on GLOFs and (iv) international collaboration are addressed.
Perry Bartelt, Peter Bebi, Thomas Feistl, Othmar Buser, and Andrin Caviezel
Nat. Hazards Earth Syst. Sci., 18, 759–764, https://doi.org/10.5194/nhess-18-759-2018, https://doi.org/10.5194/nhess-18-759-2018, 2018
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We study how short duration powder avalanche blasts break and overturn tall trees. Tree blow-down is often used to back-calculate avalanche pressure and therefore constrain avalanche flow velocity and motion. We find that tall trees are susceptible to avalanche air blasts because the duration of the air blast is near to the period of vibration of tall trees. Dynamic magnification factors should therefore be considered when back-calculating powder avalanche impact pressures.
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Short summary
We investigate the contemporary ground deformation along the RLHR-HZ using Sentinel-1 data and find that the RLHR-HZ runs through two main subsidence areas. A total length of 35 km of the RLSR-HZ is affected by the two subsidence basins. Considering the previous investigation coupled with information on human activities, we conclude that the subsidence is mainly caused by extraction of groundwater and underground mining.
We investigate the contemporary ground deformation along the RLHR-HZ using Sentinel-1 data and...
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