Pavel Liscak - Profile on Academia.edu (original) (raw)
Papers by Pavel Liscak
Landslides in Slovakia—Spatial Diversity, Activity and Impacts on Society
World Geomorphological Landscapes
Geoheritage, Historical and Cultural Landscape and Its Protection in Slovakia
World Geomorphological Landscapes
Acta Geologica Slovaca, Dec 15, 2009
Katedra inžinierskej geológie, Prírodovedecká fakulta,
Acta Geologica Slovaca, Dec 15, 2012
With the development expanding into the unstable hillslope areas under the pressures of increasin... more With the development expanding into the unstable hillslope areas under the pressures of increasing population and urbanization, extremely rainfall due to climate change and human activities such as deforestation or excavation of slopes for road cuts and building sites etc. have become important triggers for landslide occurrence with negative consequences. Stability of slopes is one of the basic engineering problems in the building constructions and design. Slope deformation near by Bojničky village is part of the large landslide area of the western boundary of Nitrianska pahorkatina Upland, between the towns of Hlohovec and Sereď. Moreover, these landslides should be in contact with the perspective construction of planned Water Work Hlohovec-Sereď. Selected landslide part of Bojničky has been periodically monitored since 1993 within project of Ministry of Environment "Partial Monitoring System of Geological Factors of Environment in the Slovak Republic". In the selected landslide, there were realized the geophysical measurement using multicable, and GNSS measurements during period of 2010 -2012. Geotechnical model was created on the base of resistivity data and lithology from existing boreholes. The results of stability analyses and GNSS monitoring of surface changes by a network of observed points indicate the instability of whole landslide body. The instability of slope has been proven in the central part of landslide, where the degree of stability was less than 1.1 even at dry condition (without infl uence of groundwater). Also, the results of geodetic GNSS measurements suggest increased activity particularly of partial scarp zones (points HSJ-37A and HSJ-38). The major measured changes of monitored points were detected just after the extreme precipitation fallen in the area in June 2011 (80.6 mm). Based on stability's research the landslide has been considered to be the unstable, which was documented not only stability analyses but also position and elevation changes of observation points.
Landslides, 2017
Landslides are one of the most widespread geohazards in Europe, producing significant social and ... more Landslides are one of the most widespread geohazards in Europe, producing significant social and economic impacts. Rapid population growth in urban areas throughout many countries in Europe and extreme climatic scenarios can considerably increase landslide risk in the near future. Variability exists between European countries in both the statutory treatment of landslide risk and the use of official assessment guidelines. This suggests that a European Landslides Directive that provides a common legal framework for dealing with landslides is necessary. With this long-term goal in mind, this work analyzes the landslide databases from the Geological Surveys of Europe focusing on their interoperability and completeness. The same landslide classification could be used for the 849,543 landslide records from the Geological Surveys, from which 36% are slides, 10% are falls, 20% are flows, 11% are complex slides, and 24% either remain unclassified or correspond to another typology. Most of them are mapped with the same symbol at a scale of 1:25,000 or greater, providing the necessary information to elaborate European-scale susceptibility maps for each landslide type. A landslide density map was produced for the available records from the Geological Surveys (LANDEN map) showing, for the first time, 210,544km 2 landslide-prone areas and 23,681 administrative areas where the Geological Surveys from Europe have recorded landslides. The comparison of this map with the European landslide susceptibility map (ELSUS 1000 v1) is successful for most of the territory (69.7%) showing certain variability between countries. This comparison also permitted the identification of 0.98Mkm 2 (28.9%) of landslide-susceptible areas without records from the Geological Surveys, which have been used to evaluate the landslide database completeness. The estimated completeness of the landslide databases (LDBs) from the Geological Surveys is 17%, varying between 1 and 55%. This variability is due to the different landslide strategies adopted by each country. In some of them, landslide mapping is systematic; others only record damaging landslides, whereas in others, landslide maps are only available for certain regions or local areas. Moreover, in most of the countries, LDBs from the Geological Surveys co-exist with others owned by a variety of public institutions producing LDBs at variable scales and formats. Hence, a greater coordination effort should be made by all the institutions working in landslide mapping to increase data integration and harmonization.
Journal of Sustainable Mining, 2014
The complex monitoring of rock slides with the size of 16 ha in order to predict the development ... more The complex monitoring of rock slides with the size of 16 ha in order to predict the development of other slides and prevent possible human and material losses. Precise geodetic point measurement, terrestrial laser and image scanning and aerial photogrammetry were used to obtain detailed knowledge about the geometry and behaviour of the rock slide. Except for terrestrial images, the images were taken using an SLR camera (set on a motor paraglide) and a compact camera (set on a remotely piloted system). The state and condition of the locality before the rock slide was taken from archive images taken by a digital large format camera. Vectors and velocities of the displacements of discrete points were determined with high precision; the changes in quarry wall surfaces were determined by laser and photogrammetry scanning. Finally, high resolution orthophotomosaics of the site were generated using aerial photogrammetry at each observation point. The termination of mining and the design of the remediation works were determined according to the results of the measurements. Also, monitoring was carried out in order to observe any changes due to the implementation of a highway project based in the localisation. Complex geodetic and photogrammetric monitoring of rock slides offers detailed information about slide surfaces and has previously been used in Slovakia on a significant scale.
Acta Geologica Slovaca, Jun 15, 2014
Prevention against landslides formation or activation is ensured by permanent monitoring of endan... more Prevention against landslides formation or activation is ensured by permanent monitoring of endangered areas, which is transferred to the landslide early warning systems in the socio-economically important sites. The paper describes general issues of the landslide warning systems creation, with an emphasis on their local level and the issues of the critical levels of landslide generating factors derivation. Since the state of the groundwater table level is usually the most important factor of the landslide activation, several methods of its critical level determination are used. The authors preferentially deal with the description of the model of parameters of groundwater regime, which was derived on the basis of their long-term experience in monitoring of landslides and other slope deformations. The model is based on the derivation of parameters characterizing the depth of the groundwater table level and duration of unfavorable conditions. The resulting parameters of the groundwater regime are compared with the indicators of kinetic activity of landslide masses (obtained by geodetic and inclinometer measurements). Provided there is a sufficiently close correlation between the groundwater regime and sliding activity of a landslide, the model can be applied in the definition of the critical levels of the groundwater table and to the prognosis of the expected motional activity of landslide. Practical application of this method is presented on example of slope stability development evaluation of the monitored landslide near the Okoličné Village.
Integration of Geohazards into Urban and Land-Use Planning. Towards a Landslide Directive. The EuroGeoSurveys Questionnaire
Exposure to hazards is expected to increase in Europe, due to rapid population growth in urban ar... more Exposure to hazards is expected to increase in Europe, due to rapid population growth in urban areas and the escalation of urbanization throughout many countries. In the framework of the European Geological Surveys (EGS), the Earth Observation and Geohazards Expert Group (EOEG) has carried out a survey based enquiry regarding the integration of geohazards (earthquakes, volcanoes, landslides, ground subsidence, floods and others) into urban and land-use planning. Responses from 19 European countries and 5 regions reveal heterogeneous policies across national borders. 17% of the countries have not yet implemented any legal measures to integrate geohazards into urban and land-use plans and half of the participating countries have no official methodological guides to construct geohazard maps. Additionally, there is a scarce knowledge about real social impacts of geohazards and resulting disasters in many of the countries, although they have a significant impact on their national economi...
The presented study shows using of bivariate and multivariate statistical analyses in mountain ar... more The presented study shows using of bivariate and multivariate statistical analyses in mountain area of the Krivánska Fatra Mountains affected by debris flows. Three generations of data were studied in order to assess the debris flows in the area, from these two main periods of debris flows were taken into the analysis: the debris flows from 1950s to 1970s and catastrophic debris flows from July 2014. Various input data were used in the statistical analyses: elevation, slope angle, plan curvature, topographic wetness index, flow accumulation, lithology, and land cover. Two main evaluations were made: first using the older debris flow data and second using debris flow data from the both periods. Receiver operating characteristic analysis was performed in order to assess the reliability of the models with the area under curve more than 95 % for both evaluations and more than 85 % for the first evaluation checked by both periods of debris flows in case of multivariate analysis, respecti...
SAR interferometry (InSAR) is inherently a relative geodetic technique requiring one temporal and... more SAR interferometry (InSAR) is inherently a relative geodetic technique requiring one temporal and one spatial reference to obtain the datum-free estimates on millimetre-level displacements within the network of radar scatterers. To correct the systematic errors, such as the varying atmospheric delay, and solve the phase ambiguities, it relies on the first-order estimation network of coherent point scatterers (PS).
Integration of landslide hazard into urban planning across Europe
Landscape and Urban Planning
Abstract An enquiry-based and participatory analysis approach is carried out to identify the stre... more Abstract An enquiry-based and participatory analysis approach is carried out to identify the strengths and weaknesses in the heterogeneous legislations across Europe that regulate the integration of landslide hazard into urban planning. Twenty one national and eight regional Geological Surveys (GSs) have participated in the analysis. The GSs report almost 4000 recent (2015–2017) damaging landslides events resulting in 39 fatalities and 155 injuries, destruction to housing, infrastructure and properties. In addition, 11 countries report 18 MORLE events over the past 10 years responsible for 150 fatalities and severe economic impacts. Results also reveal almost 48 million people living in areas with high and very high degrees of landslide-susceptibility (around 1 million km2 according to ELSUS v2). This work shows that almost half the participating countries (10 countries) have no legal guidance in the National Land Bill to stipulate consideration of landslides in urban planning practices, and mapping tools are often not adapted to a standard required to inform sustainable development. Furthermore, there is a wide range of laws and a large heterogeneity of mapping methods, scales and procedures. A relevant deficiency detected in many countries is the lack of landslide maps at a detailed resolution for urban planning. Additionally, some case studies of suboptimal urban development practices in areas of known instability have been discussed; they are found to be related to weak rule of law and/or absence of good governance. This paper shows inconsistencies across Europe in the handling of landslides and proposes a series of key actions to improve this situation, highlighting the need for a common regulatory framework to deal with this geohazard appropriately.
Geografický časopis - Geographical Journal
Mapping of debris flows by the morphometric analysis of DTM: a case study of the Vrátna dolina Va... more Mapping of debris flows by the morphometric analysis of DTM: a case study of the Vrátna dolina Valley, Slovakia The main objective of this contribution is to detect the morphogenetic processes by the numerical method of the differential geometry technique and compare the results with field surveying. The area of interest, the Vrátna dolina Valley, is located in the Malá Fatra Mountains in the northern part of Slovakia. Extensive mass movement deformations occurred in the surveyed area in 2014 induced by extreme precipitation events caused considerable damage. The Proxima software technology has been used to identify terrain elements using a precise digital terrain model (DTM) for the localisation of the debris flows head scarps. Precise DTM was derived from the airborne laser scanning (ALS) data. The morphometric analysis of landslide area was carried out on four selected locations. Verification of numerical mapping was performed by comparing results to the field survey data through visual comparison and area computation. Supplementary data was used in the form of orthophoto mosaics. The used spatial analysis applied on ALS data shows a high coincidence with the detection of the head scarps by field surveying, particularly in the hard to access and afforested areas. The main advantage of this approach lies in the reduction of field surveying and in the possible detection of the terrain changes not found during field surveying.
During the spring of 2013, a relatively large rockslide with a total area of 96,952 m2 occurred i... more During the spring of 2013, a relatively large rockslide with a total area of 96,952 m2 occurred in the eastern part of the Malá Fatra mountains. The anticipated depth of the slip surfaces was from 30 to 40 metres and the volume of moving mass was estimated to be 2,000,000 m3. The maximum movement of the rockslide on the first day in March 2013 was estimated to be 43 m. The front of the rockslide interfered with the projected D1 highway route. The paper presented here offers an analysis of the causes of the rockslide and its activity in association with the potential threat to the proposed highway.
Catastrophic Landslide in Nižná MyšĬa Village (Eastern Slovakia)
Landslide Science for a Safer Geoenvironment, 2014
Landslides belong to the most significant geodynamic phenomena in the Slovak Republic. According ... more Landslides belong to the most significant geodynamic phenomena in the Slovak Republic. According to the recent data more than 21,190 slope failures (mostly landslides) have been registered in the Slovak part of the Western Carpathians. They cover an area of 2,576 km2 which represent 5.25 % of the total area of Slovakia. The landslides are concentrated especially in the Flysch and Neovolcanic regions. In May and June 2010 extraordinary rainfalls induced a lot of slope failures in some regions of Slovakia. More than 550 newly evolved landslides were registered especially in the Eastern Slovakia. The most disastrous landslide occurred in the Nižna Mysľa Village in the 4th June 2010. Amidst the village the local infrastructure (roads, gas and water pipelines, wells) and 40 houses were damaged. Twenty nine of them had to be demolished and several others became uninhabitable. Fortunately nobody was injured or died. After the Handlova landslide (1960–1961) it was the 2nd biggest one in Slovakia as concerns damages. The geological conditions of the area are prone for landsliding. The slopes at the western part of village are built by the Neogene high plastic clays with tuff and sand intercalations. The clays are sensitive to swelling and shrinking. The extreme rainfalls (250 mm/month) can be considered as the main triggering factor of sliding. After the landslide event the emergency state had been declared and the engineering geological survey started in June 2010. During the first stage of remedial works the middle part of village was stabilized. Currently, the whole landslide area is permanently monitored geodetically and by set of piezometric and inclinometric boreholes. The second stage of stabilization is in preparation. All the geological works at the landslide are coordinated by the Ministry of the Environment of the Slovak Republic and financed by the Slovak Government.
3D terrestrial laser scanning is a relatively new, but already revolutionary, surveying technique... more 3D terrestrial laser scanning is a relatively new, but already revolutionary, surveying technique. The survey yield a digital data set, which is essentially a dense “point cloud”, where each point is represented by a coordinate in 3D space. The most important advantage of the method is that a very high point density can be achieved, in the order of 5 to 10 mm resolution. In order to analyse the character and shape of the scanned surfaces it is necessary to convert the irregularly distributed point data into 3D surface information using surface reconstruction. The reconstructed surface can subsequently be visualized using a variety of 3D visualization techniques. From the reconstructed 3D surfaces, it is also possible to generate 2D profiles or elevation contour lines for use in regular GIS or CAD packages. A number of applications are described in this paper, which may illustrate the possible benefits of using laser scanning as a technique in engineering geological practice and rese...
Monitoring of natural hazards in Slovakia by using of satellite radar interferometry
Procedia Computer Science
The Application of Engineering Geology to Dam Construction - Book Review
Geological Quarterly, Apr 1, 2013
Fuel and Energy Abstracts, 2011
Erratum to "Mineral waters in Slovakia -Evaluation of chemical composition stability using both h... more Erratum to "Mineral waters in Slovakia -Evaluation of chemical composition stability using both historical records and the most recent data" [
Landslides in Slovakia—Spatial Diversity, Activity and Impacts on Society
World Geomorphological Landscapes
Geoheritage, Historical and Cultural Landscape and Its Protection in Slovakia
World Geomorphological Landscapes
Acta Geologica Slovaca, Dec 15, 2009
Katedra inžinierskej geológie, Prírodovedecká fakulta,
Acta Geologica Slovaca, Dec 15, 2012
With the development expanding into the unstable hillslope areas under the pressures of increasin... more With the development expanding into the unstable hillslope areas under the pressures of increasing population and urbanization, extremely rainfall due to climate change and human activities such as deforestation or excavation of slopes for road cuts and building sites etc. have become important triggers for landslide occurrence with negative consequences. Stability of slopes is one of the basic engineering problems in the building constructions and design. Slope deformation near by Bojničky village is part of the large landslide area of the western boundary of Nitrianska pahorkatina Upland, between the towns of Hlohovec and Sereď. Moreover, these landslides should be in contact with the perspective construction of planned Water Work Hlohovec-Sereď. Selected landslide part of Bojničky has been periodically monitored since 1993 within project of Ministry of Environment "Partial Monitoring System of Geological Factors of Environment in the Slovak Republic". In the selected landslide, there were realized the geophysical measurement using multicable, and GNSS measurements during period of 2010 -2012. Geotechnical model was created on the base of resistivity data and lithology from existing boreholes. The results of stability analyses and GNSS monitoring of surface changes by a network of observed points indicate the instability of whole landslide body. The instability of slope has been proven in the central part of landslide, where the degree of stability was less than 1.1 even at dry condition (without infl uence of groundwater). Also, the results of geodetic GNSS measurements suggest increased activity particularly of partial scarp zones (points HSJ-37A and HSJ-38). The major measured changes of monitored points were detected just after the extreme precipitation fallen in the area in June 2011 (80.6 mm). Based on stability's research the landslide has been considered to be the unstable, which was documented not only stability analyses but also position and elevation changes of observation points.
Landslides, 2017
Landslides are one of the most widespread geohazards in Europe, producing significant social and ... more Landslides are one of the most widespread geohazards in Europe, producing significant social and economic impacts. Rapid population growth in urban areas throughout many countries in Europe and extreme climatic scenarios can considerably increase landslide risk in the near future. Variability exists between European countries in both the statutory treatment of landslide risk and the use of official assessment guidelines. This suggests that a European Landslides Directive that provides a common legal framework for dealing with landslides is necessary. With this long-term goal in mind, this work analyzes the landslide databases from the Geological Surveys of Europe focusing on their interoperability and completeness. The same landslide classification could be used for the 849,543 landslide records from the Geological Surveys, from which 36% are slides, 10% are falls, 20% are flows, 11% are complex slides, and 24% either remain unclassified or correspond to another typology. Most of them are mapped with the same symbol at a scale of 1:25,000 or greater, providing the necessary information to elaborate European-scale susceptibility maps for each landslide type. A landslide density map was produced for the available records from the Geological Surveys (LANDEN map) showing, for the first time, 210,544km 2 landslide-prone areas and 23,681 administrative areas where the Geological Surveys from Europe have recorded landslides. The comparison of this map with the European landslide susceptibility map (ELSUS 1000 v1) is successful for most of the territory (69.7%) showing certain variability between countries. This comparison also permitted the identification of 0.98Mkm 2 (28.9%) of landslide-susceptible areas without records from the Geological Surveys, which have been used to evaluate the landslide database completeness. The estimated completeness of the landslide databases (LDBs) from the Geological Surveys is 17%, varying between 1 and 55%. This variability is due to the different landslide strategies adopted by each country. In some of them, landslide mapping is systematic; others only record damaging landslides, whereas in others, landslide maps are only available for certain regions or local areas. Moreover, in most of the countries, LDBs from the Geological Surveys co-exist with others owned by a variety of public institutions producing LDBs at variable scales and formats. Hence, a greater coordination effort should be made by all the institutions working in landslide mapping to increase data integration and harmonization.
Journal of Sustainable Mining, 2014
The complex monitoring of rock slides with the size of 16 ha in order to predict the development ... more The complex monitoring of rock slides with the size of 16 ha in order to predict the development of other slides and prevent possible human and material losses. Precise geodetic point measurement, terrestrial laser and image scanning and aerial photogrammetry were used to obtain detailed knowledge about the geometry and behaviour of the rock slide. Except for terrestrial images, the images were taken using an SLR camera (set on a motor paraglide) and a compact camera (set on a remotely piloted system). The state and condition of the locality before the rock slide was taken from archive images taken by a digital large format camera. Vectors and velocities of the displacements of discrete points were determined with high precision; the changes in quarry wall surfaces were determined by laser and photogrammetry scanning. Finally, high resolution orthophotomosaics of the site were generated using aerial photogrammetry at each observation point. The termination of mining and the design of the remediation works were determined according to the results of the measurements. Also, monitoring was carried out in order to observe any changes due to the implementation of a highway project based in the localisation. Complex geodetic and photogrammetric monitoring of rock slides offers detailed information about slide surfaces and has previously been used in Slovakia on a significant scale.
Acta Geologica Slovaca, Jun 15, 2014
Prevention against landslides formation or activation is ensured by permanent monitoring of endan... more Prevention against landslides formation or activation is ensured by permanent monitoring of endangered areas, which is transferred to the landslide early warning systems in the socio-economically important sites. The paper describes general issues of the landslide warning systems creation, with an emphasis on their local level and the issues of the critical levels of landslide generating factors derivation. Since the state of the groundwater table level is usually the most important factor of the landslide activation, several methods of its critical level determination are used. The authors preferentially deal with the description of the model of parameters of groundwater regime, which was derived on the basis of their long-term experience in monitoring of landslides and other slope deformations. The model is based on the derivation of parameters characterizing the depth of the groundwater table level and duration of unfavorable conditions. The resulting parameters of the groundwater regime are compared with the indicators of kinetic activity of landslide masses (obtained by geodetic and inclinometer measurements). Provided there is a sufficiently close correlation between the groundwater regime and sliding activity of a landslide, the model can be applied in the definition of the critical levels of the groundwater table and to the prognosis of the expected motional activity of landslide. Practical application of this method is presented on example of slope stability development evaluation of the monitored landslide near the Okoličné Village.
Integration of Geohazards into Urban and Land-Use Planning. Towards a Landslide Directive. The EuroGeoSurveys Questionnaire
Exposure to hazards is expected to increase in Europe, due to rapid population growth in urban ar... more Exposure to hazards is expected to increase in Europe, due to rapid population growth in urban areas and the escalation of urbanization throughout many countries. In the framework of the European Geological Surveys (EGS), the Earth Observation and Geohazards Expert Group (EOEG) has carried out a survey based enquiry regarding the integration of geohazards (earthquakes, volcanoes, landslides, ground subsidence, floods and others) into urban and land-use planning. Responses from 19 European countries and 5 regions reveal heterogeneous policies across national borders. 17% of the countries have not yet implemented any legal measures to integrate geohazards into urban and land-use plans and half of the participating countries have no official methodological guides to construct geohazard maps. Additionally, there is a scarce knowledge about real social impacts of geohazards and resulting disasters in many of the countries, although they have a significant impact on their national economi...
The presented study shows using of bivariate and multivariate statistical analyses in mountain ar... more The presented study shows using of bivariate and multivariate statistical analyses in mountain area of the Krivánska Fatra Mountains affected by debris flows. Three generations of data were studied in order to assess the debris flows in the area, from these two main periods of debris flows were taken into the analysis: the debris flows from 1950s to 1970s and catastrophic debris flows from July 2014. Various input data were used in the statistical analyses: elevation, slope angle, plan curvature, topographic wetness index, flow accumulation, lithology, and land cover. Two main evaluations were made: first using the older debris flow data and second using debris flow data from the both periods. Receiver operating characteristic analysis was performed in order to assess the reliability of the models with the area under curve more than 95 % for both evaluations and more than 85 % for the first evaluation checked by both periods of debris flows in case of multivariate analysis, respecti...
SAR interferometry (InSAR) is inherently a relative geodetic technique requiring one temporal and... more SAR interferometry (InSAR) is inherently a relative geodetic technique requiring one temporal and one spatial reference to obtain the datum-free estimates on millimetre-level displacements within the network of radar scatterers. To correct the systematic errors, such as the varying atmospheric delay, and solve the phase ambiguities, it relies on the first-order estimation network of coherent point scatterers (PS).
Integration of landslide hazard into urban planning across Europe
Landscape and Urban Planning
Abstract An enquiry-based and participatory analysis approach is carried out to identify the stre... more Abstract An enquiry-based and participatory analysis approach is carried out to identify the strengths and weaknesses in the heterogeneous legislations across Europe that regulate the integration of landslide hazard into urban planning. Twenty one national and eight regional Geological Surveys (GSs) have participated in the analysis. The GSs report almost 4000 recent (2015–2017) damaging landslides events resulting in 39 fatalities and 155 injuries, destruction to housing, infrastructure and properties. In addition, 11 countries report 18 MORLE events over the past 10 years responsible for 150 fatalities and severe economic impacts. Results also reveal almost 48 million people living in areas with high and very high degrees of landslide-susceptibility (around 1 million km2 according to ELSUS v2). This work shows that almost half the participating countries (10 countries) have no legal guidance in the National Land Bill to stipulate consideration of landslides in urban planning practices, and mapping tools are often not adapted to a standard required to inform sustainable development. Furthermore, there is a wide range of laws and a large heterogeneity of mapping methods, scales and procedures. A relevant deficiency detected in many countries is the lack of landslide maps at a detailed resolution for urban planning. Additionally, some case studies of suboptimal urban development practices in areas of known instability have been discussed; they are found to be related to weak rule of law and/or absence of good governance. This paper shows inconsistencies across Europe in the handling of landslides and proposes a series of key actions to improve this situation, highlighting the need for a common regulatory framework to deal with this geohazard appropriately.
Geografický časopis - Geographical Journal
Mapping of debris flows by the morphometric analysis of DTM: a case study of the Vrátna dolina Va... more Mapping of debris flows by the morphometric analysis of DTM: a case study of the Vrátna dolina Valley, Slovakia The main objective of this contribution is to detect the morphogenetic processes by the numerical method of the differential geometry technique and compare the results with field surveying. The area of interest, the Vrátna dolina Valley, is located in the Malá Fatra Mountains in the northern part of Slovakia. Extensive mass movement deformations occurred in the surveyed area in 2014 induced by extreme precipitation events caused considerable damage. The Proxima software technology has been used to identify terrain elements using a precise digital terrain model (DTM) for the localisation of the debris flows head scarps. Precise DTM was derived from the airborne laser scanning (ALS) data. The morphometric analysis of landslide area was carried out on four selected locations. Verification of numerical mapping was performed by comparing results to the field survey data through visual comparison and area computation. Supplementary data was used in the form of orthophoto mosaics. The used spatial analysis applied on ALS data shows a high coincidence with the detection of the head scarps by field surveying, particularly in the hard to access and afforested areas. The main advantage of this approach lies in the reduction of field surveying and in the possible detection of the terrain changes not found during field surveying.
During the spring of 2013, a relatively large rockslide with a total area of 96,952 m2 occurred i... more During the spring of 2013, a relatively large rockslide with a total area of 96,952 m2 occurred in the eastern part of the Malá Fatra mountains. The anticipated depth of the slip surfaces was from 30 to 40 metres and the volume of moving mass was estimated to be 2,000,000 m3. The maximum movement of the rockslide on the first day in March 2013 was estimated to be 43 m. The front of the rockslide interfered with the projected D1 highway route. The paper presented here offers an analysis of the causes of the rockslide and its activity in association with the potential threat to the proposed highway.
Catastrophic Landslide in Nižná MyšĬa Village (Eastern Slovakia)
Landslide Science for a Safer Geoenvironment, 2014
Landslides belong to the most significant geodynamic phenomena in the Slovak Republic. According ... more Landslides belong to the most significant geodynamic phenomena in the Slovak Republic. According to the recent data more than 21,190 slope failures (mostly landslides) have been registered in the Slovak part of the Western Carpathians. They cover an area of 2,576 km2 which represent 5.25 % of the total area of Slovakia. The landslides are concentrated especially in the Flysch and Neovolcanic regions. In May and June 2010 extraordinary rainfalls induced a lot of slope failures in some regions of Slovakia. More than 550 newly evolved landslides were registered especially in the Eastern Slovakia. The most disastrous landslide occurred in the Nižna Mysľa Village in the 4th June 2010. Amidst the village the local infrastructure (roads, gas and water pipelines, wells) and 40 houses were damaged. Twenty nine of them had to be demolished and several others became uninhabitable. Fortunately nobody was injured or died. After the Handlova landslide (1960–1961) it was the 2nd biggest one in Slovakia as concerns damages. The geological conditions of the area are prone for landsliding. The slopes at the western part of village are built by the Neogene high plastic clays with tuff and sand intercalations. The clays are sensitive to swelling and shrinking. The extreme rainfalls (250 mm/month) can be considered as the main triggering factor of sliding. After the landslide event the emergency state had been declared and the engineering geological survey started in June 2010. During the first stage of remedial works the middle part of village was stabilized. Currently, the whole landslide area is permanently monitored geodetically and by set of piezometric and inclinometric boreholes. The second stage of stabilization is in preparation. All the geological works at the landslide are coordinated by the Ministry of the Environment of the Slovak Republic and financed by the Slovak Government.
3D terrestrial laser scanning is a relatively new, but already revolutionary, surveying technique... more 3D terrestrial laser scanning is a relatively new, but already revolutionary, surveying technique. The survey yield a digital data set, which is essentially a dense “point cloud”, where each point is represented by a coordinate in 3D space. The most important advantage of the method is that a very high point density can be achieved, in the order of 5 to 10 mm resolution. In order to analyse the character and shape of the scanned surfaces it is necessary to convert the irregularly distributed point data into 3D surface information using surface reconstruction. The reconstructed surface can subsequently be visualized using a variety of 3D visualization techniques. From the reconstructed 3D surfaces, it is also possible to generate 2D profiles or elevation contour lines for use in regular GIS or CAD packages. A number of applications are described in this paper, which may illustrate the possible benefits of using laser scanning as a technique in engineering geological practice and rese...
Monitoring of natural hazards in Slovakia by using of satellite radar interferometry
Procedia Computer Science
The Application of Engineering Geology to Dam Construction - Book Review
Geological Quarterly, Apr 1, 2013
Fuel and Energy Abstracts, 2011
Erratum to "Mineral waters in Slovakia -Evaluation of chemical composition stability using both h... more Erratum to "Mineral waters in Slovakia -Evaluation of chemical composition stability using both historical records and the most recent data" [