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Radek Tichavský
University of Ostrava, Faculty of Science, Department of Physical Geography and Geoecology, Chittussiho 10, 710 00 Ostrava-Slezská Ostrava, Czech Republic

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Journal article
Published: 21 July 2021 in CATENA
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The degradation of forest ecosystems represents a severe environmental issue in anthropogenically modified landscapes worldwide. We demonstrated the negative impact of contaminated debris flow deposits on riparian forest in the Romanian Carpathians through the innovative combination of several dendroecological approaches. Reconstruction of debris flow activity using 95 individuals of Picea abies (L.) Karst. was performed to identify 11 events during the period 1952–2018. Recent events (e.g., 2007, 2014, 2016–2017) filled the valley floor after the stream was dammed in the 1980s, which deteriorated tree growth. This state was worsened by site acidity (pH = 3.8), low organic carbon, high sulfur content, and high concentrations of several metals in debris flow deposits. Wood anatomical analyses confirmed that trees producing tangential rows of traumatic resin ducts as a possible response to burial by toxic debris material subsequently produced smaller and flatter earlywood tracheids. In particular, the most obvious changes (average decrease in tracheid lumen area by 62.9% over two years) occurred after the 2016 debris flow event. Using inductively coupled plasma optical emission and/or mass spectrometry, we identified peak or increased concentrations of thallium (max. 0.7 mg kg−1), caesium (max. 0.4 mg kg−1), and aluminium (max. 434 mg kg−1) in tree biomass that could be related to debris flow activity in 1996, 2007, and 2016. Regarding the individual-specific responses of sampled trees, we conclude that the forest decline is caused by complex interaction between the depth of tree burial by debris flow deposits, the mechanical weight and chemistry of deposits, and the rate of nutrient and toxic element uptake.

ACS Style

Radek Tichavský; Olimpiu Traian Pop; Martin Mihaljevič; Karel Šilhán; Lenka Vondrovicová. Tree ring archives of debris flow contamination in a post-mined area: Combined dendroecological research. CATENA 2021, 207, 105595 .

AMA Style

Radek Tichavský, Olimpiu Traian Pop, Martin Mihaljevič, Karel Šilhán, Lenka Vondrovicová. Tree ring archives of debris flow contamination in a post-mined area: Combined dendroecological research. CATENA. 2021; 207 ():105595.

Chicago/Turabian Style

Radek Tichavský; Olimpiu Traian Pop; Martin Mihaljevič; Karel Šilhán; Lenka Vondrovicová. 2021. "Tree ring archives of debris flow contamination in a post-mined area: Combined dendroecological research." CATENA 207, no. : 105595.

Journal article
Published: 01 April 2021 in Science of The Total Environment
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Unlike large rivers, floods in headwaters have been poorly documented despite the fact that greater discharges are expected in such areas due to ongoing rainfall intensification. The purpose of this study is to carry out intra-annual dating of past floods combined with analysis of their climate linkages which may point on distribution and origin of floods. To this end, we applied dendrogeomorphic dating of impact scars on riparian vegetation to provide flood chronologies in twelve headwaters of eastern Czechia and determined their seasonal occurrences. Furthermore, we analyzed the precipitation indices and evaluated the flood events using reanalysis of pressure fields and the climate oscillation indices, particularly those representing the North Atlantic, Scandinavian, and East Atlantic/Western Russian patterns. Based on 434 dated trees, we identified 22–31 flood event years in each region over the last 70 years. The most frequent floods occurred from May to July. In addition, in ten event years it was possible to identify multiple flood events: for example May and July–August floods in 2010, 2014, and 2016. The monthly precipitation showed the strongest, but still weak, correlation with indices of Scandinavian climate oscillation during summer months (Rs = 0.23–0.42; p < 0.00), suggesting the influence of a blocking anticyclone over Scandinavia and wet air propagation to central Europe. This finding was also confirmed by the most frequent positions of low-pressure centers located east of the study sites except for the region with western orographic enhancement. In addition, timing shift of extreme precipitation to earlier period was identified at two out of three regions. We conclude that intra-annual dating of floods supported by analyses of climate extremes provides new data from sparsely gauged headwaters, thereby supplementing the information on possible changes in flood occurrences during ongoing climate change.

ACS Style

Radek Tichavský; Andrea Fabiánová; Radim Tolasz. Intra-annual dendrogeomorphic dating and climate linkages of flood events in headwaters of central Europe. Science of The Total Environment 2021, 763, 142953 .

AMA Style

Radek Tichavský, Andrea Fabiánová, Radim Tolasz. Intra-annual dendrogeomorphic dating and climate linkages of flood events in headwaters of central Europe. Science of The Total Environment. 2021; 763 ():142953.

Chicago/Turabian Style

Radek Tichavský; Andrea Fabiánová; Radim Tolasz. 2021. "Intra-annual dendrogeomorphic dating and climate linkages of flood events in headwaters of central Europe." Science of The Total Environment 763, no. : 142953.

Original paper
Published: 19 October 2020 in Natural Hazards
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This study represents the first palaeoflood discharge estimation using dendrogeomorphic evidence from two ungauged catchments in southern Crete. Dendrogeomorphological methods, rainfall-runoff and hydraulic modelling were applied to estimate the palaeoflood discharge of the 2000 flood event. We developed two scenarios (QHydraulic, QRR) of peak discharges in the short reaches of the Ilingas and Sfakia catchments. Scenario QRR was based on the results of the uncalibrated rainfall-runoff model HEC-HMS. The calculated discharges were equal to 35.9 m3 s−1 in the Ilingas reach and 7.6 m3 s−1 in the Sfakia reach. The second scenario, QHydraulic was based on the output of the two-dimensional hydraulic model IBER, which was calibrated using six palaeostage indicators obtained during a field survey. The reconstructed discharge for the QHydraulic scenario was equal to 26.3 m3 s−1 in Ilingas and 11.2 m3 s−1 in Sfakia. Deviation (26.7% in Ilingas and 32.1% in Sfakia) between the scenarios were attributed mainly to the uncertainties of in flood reconstruction using the palaeostage indicators and uncalibrated rainfall-runoff model. We further investigated uncertainty in Manning’s roughness coefficient, which caused deviations in peak discharges with the range of these deviations defined within ± 40% in the Ilingas reach and ± 36% in the Sfakia reach.

ACS Style

Stanislav Ruman; Radek Tichavský; Karel Šilhán; Manolis G. Grillakis. Palaeoflood discharge estimation using dendrogeomorphic methods, rainfall-runoff and hydraulic modelling—a case study from southern Crete. Natural Hazards 2020, 105, 1721 -1742.

AMA Style

Stanislav Ruman, Radek Tichavský, Karel Šilhán, Manolis G. Grillakis. Palaeoflood discharge estimation using dendrogeomorphic methods, rainfall-runoff and hydraulic modelling—a case study from southern Crete. Natural Hazards. 2020; 105 (2):1721-1742.

Chicago/Turabian Style

Stanislav Ruman; Radek Tichavský; Karel Šilhán; Manolis G. Grillakis. 2020. "Palaeoflood discharge estimation using dendrogeomorphic methods, rainfall-runoff and hydraulic modelling—a case study from southern Crete." Natural Hazards 105, no. 2: 1721-1742.

Journal article
Published: 24 April 2020 in Engineering Geology
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Mining-induced subsidence is a worldwide environmental problem that leads to damage to infrastructure and property; thus, knowledge of its past–recent development is critically needed during land-use planning. Moreover, the temporal occurrence of subsidence is greatly variable, with tendencies for gradual to abrupt movements. Subsidence rates can currently be achieved via radar interferometry, but these data usually cover short time periods and are less accurate in forested areas. In such cases, dendrogeomorphic dating can provide chronologies of past subsidence activity. In addition, comparisons of tree-ring-based data with in situ monitoring may answer the sensitivity and reliability of dating methods in these specific conditions of continuous ground movement. Geomorphic mapping and dendrogeomorphic dating were performed at two forested landslide sites affected by coal mining subsidence in the Upper Silesian Basin (Czech Republic), and the resulting chronology from one site was compared with levelling campaigns occurring from 1998 to 2015. Based on 284 increment cores from 71 trees, we were able to identify 7 subsidence events at the site dominated by a pioneering forest and 19 subsidence events at the site overgrown by a mature forest, with the most frequent responses occurring from 1956 to 1971 and 2005–2011. The occurrence of multiple compression wood growth intervals, some occurring in different directions of tree stems (more than 30% of sampled trees) indicated complex deformations presented by the flow-like mechanism of waterlogged surfaces, ongoing subsidence spreading, and fragmentation of larger blocks and grabens. A comparison of tree-ring-based chronology with in situ monitoring revealed good synchronicity with the periods of increased subsidence rates (between 1 and 3 m.year−1), thus indicating the high relevance of dendrogeomorphic methods for the determination of the most intense periods of ground subsidence. Our results show the first comparison of dendrogeomorphic methods with in situ monitoring of human-induced subsidence areas and provide an alternative option for reconstructing decadal to centennial development of the affected areas.

ACS Style

Radek Tichavský; Eva Jiránková; Andrea Fabiánová. Dating of mining-induced subsidence based on a combination of dendrogeomorphic methods and in situ monitoring. Engineering Geology 2020, 272, 105650 .

AMA Style

Radek Tichavský, Eva Jiránková, Andrea Fabiánová. Dating of mining-induced subsidence based on a combination of dendrogeomorphic methods and in situ monitoring. Engineering Geology. 2020; 272 ():105650.

Chicago/Turabian Style

Radek Tichavský; Eva Jiránková; Andrea Fabiánová. 2020. "Dating of mining-induced subsidence based on a combination of dendrogeomorphic methods and in situ monitoring." Engineering Geology 272, no. : 105650.

Journal article
Published: 22 February 2020 in Journal of Arid Environments
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The past geomorphic activity of flash floods in the Eastern Mediterranean has been poorly understood. Despite the general increase in mean annual temperature and decrease in annual precipitation totals, intense rainfall during strong cyclogenesis is still expected under a changing climate. The aim of this study was to identify past flash flood events on the island of Crete (Greece) to (i) create a regional chronology of flash floods using dendrogeomorphic dating and (ii) describe climate triggers responsible for the most distinct events. The sampling of 398 trees and shrubs from eight catchments enabled the reconstruction of 76 flash flood events over 43 different years. The length of the chronologies ranged from 27 to 125 years, and the most distinct events were recorded in the 1993–94, 2000–01, and 2006–07. Significant differences (p < 0.00001) in the ages of sampled trees and the bark thickness among the catchments resulted in different lengths of chronologies and numbers of identified events. Records from selected rain gauges were used to identify precipitation patterns associated with flash floods. The low propagation velocities of cyclones originating south and west of Crete characterised the most distinct flash flood events, based on synoptic scale analyses.

ACS Style

Radek Tichavský; Aristeidis Koutroulis; Olga Chalupová; Vladimír Chalupa; Karel Šilhán. Flash flood reconstruction in the Eastern Mediterranean: Regional tree ring-based chronology and assessment of climate triggers on the island of Crete. Journal of Arid Environments 2020, 177, 104135 .

AMA Style

Radek Tichavský, Aristeidis Koutroulis, Olga Chalupová, Vladimír Chalupa, Karel Šilhán. Flash flood reconstruction in the Eastern Mediterranean: Regional tree ring-based chronology and assessment of climate triggers on the island of Crete. Journal of Arid Environments. 2020; 177 ():104135.

Chicago/Turabian Style

Radek Tichavský; Aristeidis Koutroulis; Olga Chalupová; Vladimír Chalupa; Karel Šilhán. 2020. "Flash flood reconstruction in the Eastern Mediterranean: Regional tree ring-based chronology and assessment of climate triggers on the island of Crete." Journal of Arid Environments 177, no. : 104135.

Journal article
Published: 12 January 2020 in Water
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Floods represent frequent hazards in both low- and first-order catchments; however, to date, the investigation of peak flow discharges in the latter catchments has been omitted due to the absence of gauging stations. The quantification of flood parameters in a first-order catchment (1.8 km2) was realised in the moderate relief of NE Czechia, where the last flash flood event in 2014 caused considerable damage to the infrastructure. We used an integrated approach that included the dendrogeomorphic reconstruction of past flood activity, hydraulic modelling of the 2014 flash flood parameters using a two-dimensional IBER model, and evaluation of the channel stability using sedimentological parameters. Based on 115 flood scars, we identified 13 flood events during the period of 1955 to 2018, with the strongest signals recorded in 2014, 2009 and 1977. The modelled peak flow discharge of the last 2014 flood was equal to 4.5 m3·s−1 (RMSE = 0.32 m) using 26 scars as palaeostage indicators. The excess critical unit stream power was observed at only 24.2% of the reaches, representing predominantly bedrock and fine sediments. Despite local damage during the last flood, our results suggest relatively stable geomorphic conditions and gradual development of stream channels under discharges similar to that in 2014.

ACS Style

Radek Tichavský; Stanislav Ruman; Tomáš Galia. Hydrogeomorphic Impacts of Floods in a First-Order Catchment: Integrated Approach Based on Dendrogeomorphic Palaeostage Indicators, 2D Hydraulic Modelling and Sedimentological Parameters. Water 2020, 12, 212 .

AMA Style

Radek Tichavský, Stanislav Ruman, Tomáš Galia. Hydrogeomorphic Impacts of Floods in a First-Order Catchment: Integrated Approach Based on Dendrogeomorphic Palaeostage Indicators, 2D Hydraulic Modelling and Sedimentological Parameters. Water. 2020; 12 (1):212.

Chicago/Turabian Style

Radek Tichavský; Stanislav Ruman; Tomáš Galia. 2020. "Hydrogeomorphic Impacts of Floods in a First-Order Catchment: Integrated Approach Based on Dendrogeomorphic Palaeostage Indicators, 2D Hydraulic Modelling and Sedimentological Parameters." Water 12, no. 1: 212.

Journal article
Published: 10 October 2019 in Scientific Reports
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Landslides are frequently triggered by extreme meteorological events which has led to concern and debate about their activity in a future greenhouse climate. It is also hypothesized that dry spells preceding triggering rainfall may increase slope predisposition to sliding, especially in the case of clay-rich soils. Here we combined dendrogeomorphic time series of landslides and climatic records to test the possible role of dry spells and extreme downpours on process activity in the Outer Western Carpathians (Central Europe). To this end, we tested time series of past frequencies and return periods of landslide reactivations at the regional scale with a Generalized Linear Mixed (GLM) model to explore linkages between landslide occurrences and triggering climate variables. Results show that landslide reactivations are concentrated during years in which spring and summer precipitation sums were significantly higher than usual, and that triggering mechanisms vary between different types of landslides (i.e. complex, shallow or flow-like). The GLM model also points to the susceptibility of landslide bodies to the combined occurrence of long, dry spells followed by large precipitation. Such situations are likely to increase in frequency in the future as climate models predict an enhancement of heatwaves and dry spells in future summers, that would be interrupted by less frequent, yet more intense storms, especially also in mountain regions.

ACS Style

Radek Tichavský; Juan Antonio Ballesteros-Cánovas; Karel Šilhán; Radim Tolasz; Markus Stoffel. Dry Spells and Extreme Precipitation are The Main Trigger of Landslides in Central Europe. Scientific Reports 2019, 9, 1 -10.

AMA Style

Radek Tichavský, Juan Antonio Ballesteros-Cánovas, Karel Šilhán, Radim Tolasz, Markus Stoffel. Dry Spells and Extreme Precipitation are The Main Trigger of Landslides in Central Europe. Scientific Reports. 2019; 9 (1):1-10.

Chicago/Turabian Style

Radek Tichavský; Juan Antonio Ballesteros-Cánovas; Karel Šilhán; Radim Tolasz; Markus Stoffel. 2019. "Dry Spells and Extreme Precipitation are The Main Trigger of Landslides in Central Europe." Scientific Reports 9, no. 1: 1-10.

Journal article
Published: 27 October 2018 in Geografiska Annaler: Series A, Physical Geography
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ACS Style

Radek Tichavský. Unravelling the recent dynamics of headwaters based on a combined dendrogeomorphic approach (a case study from the Sudetes Mts., Czech Republic). Geografiska Annaler: Series A, Physical Geography 2018, 101, 16 -33.

AMA Style

Radek Tichavský. Unravelling the recent dynamics of headwaters based on a combined dendrogeomorphic approach (a case study from the Sudetes Mts., Czech Republic). Geografiska Annaler: Series A, Physical Geography. 2018; 101 (1):16-33.

Chicago/Turabian Style

Radek Tichavský. 2018. "Unravelling the recent dynamics of headwaters based on a combined dendrogeomorphic approach (a case study from the Sudetes Mts., Czech Republic)." Geografiska Annaler: Series A, Physical Geography 101, no. 1: 16-33.

Journal article
Published: 10 July 2018 in Applied Geography
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The recent acceleration of gully erosion caused by environmental factors and human impacts has led to an enhanced demand for applied research in risk-prone areas worldwide. We investigated the dynamics of gullies that have recently threatened dwellings and railways in the foreland of the Eastern Sudetes (340–390 m a.s.l. in the NE part of Czechia). Flood countermeasures in a residential area above the study site created conditions conducive to accelerated erosion in the gullies; thus, the main aim of this study was to determine how human interventions changed the spatio-temporal dynamics of the gullies during a short period. Twenty two gullies (with a mean length 48.5 m) have developed on a 1-km-wide escarpment (with a mean slope 25°) composed of glaciogenic sediments of various sizes. Dendrogeomorphic techniques were applied on 23 exposed roots of Tilia cordata Mill. (a tree species that has never been used to detect root exposure). Microsections were prepared using a G.S.L.1 sledge microtome and analysed using the WinCELL Reg software to determine the timing of root exposure. Approximately 90% of the eroded sediments (1287.4 m3) were transported across the railway onto the floodplain and caused damage to dwellings, while approximately 10% created bare accumulations at the gully floors. The most significant pulses of gully erosion occurred during the last 10 years (2007, 2009, 2010, and 2014). The maximum identified gully erosion occurred in 2014 (max. incision: 154 cm; maximum widening: 160 cm). In contrast, the development of the bank failures has been slowly progressing since the early 1990s, with a mean bank eroded area between 0.07 and 0.12 m2 year−1. The analysis of the precipitation characteristics (1963–2016) with the Mann-Kendal trend test revealed no significant trend. However, the last strong erosion event, in May of 2014, was triggered by an extraordinary rainstorm with an hourly intensity of 41.3 mm h−1 (maximum intensity of 2.8 mm min−1). Therefore, the recent increase in gully erosion is the consequence of extreme precipitation and human interventions that have been performed in the study site since 2007 (i.e., damming of the ditches and building of new culverts). The dendrogeomorphic research of exposed T. cordata roots significantly contributed to the identification of the gully erosion pulses and thus can be further applied in other localities.

ACS Style

Radek Tichavský; Olga Kluzová; Michal Břežný; Lenka Ondráčková; Petr Krpec; Radim Tolasz; Karel Šilhán. Increased gully activity induced by short-term human interventions – Dendrogeomorphic research based on exposed tree roots. Applied Geography 2018, 98, 66 -77.

AMA Style

Radek Tichavský, Olga Kluzová, Michal Břežný, Lenka Ondráčková, Petr Krpec, Radim Tolasz, Karel Šilhán. Increased gully activity induced by short-term human interventions – Dendrogeomorphic research based on exposed tree roots. Applied Geography. 2018; 98 ():66-77.

Chicago/Turabian Style

Radek Tichavský; Olga Kluzová; Michal Břežný; Lenka Ondráčková; Petr Krpec; Radim Tolasz; Karel Šilhán. 2018. "Increased gully activity induced by short-term human interventions – Dendrogeomorphic research based on exposed tree roots." Applied Geography 98, no. : 66-77.

Journal article
Published: 01 June 2018 in CATENA
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ACS Style

Tomáš Galia; Radek Tichavský; Václav Škarpich; Karel Šilhán. Characteristics of large wood in a headwater channel after an extraordinary event: The roles of transport agents and check dams. CATENA 2018, 165, 537 -550.

AMA Style

Tomáš Galia, Radek Tichavský, Václav Škarpich, Karel Šilhán. Characteristics of large wood in a headwater channel after an extraordinary event: The roles of transport agents and check dams. CATENA. 2018; 165 ():537-550.

Chicago/Turabian Style

Tomáš Galia; Radek Tichavský; Václav Škarpich; Karel Šilhán. 2018. "Characteristics of large wood in a headwater channel after an extraordinary event: The roles of transport agents and check dams." CATENA 165, no. : 537-550.

Journal article
Published: 01 November 2017 in Geomorphology
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ACS Style

Jan Lenart; Radek Tichavský; Josef Večeřa; Veronika Kapustová; Karel Šilhán. Genesis and geomorphic evolution of the Velké pinky stopes in the Zlatohorská Highlands, Eastern Sudetes. Geomorphology 2017, 296, 91 -103.

AMA Style

Jan Lenart, Radek Tichavský, Josef Večeřa, Veronika Kapustová, Karel Šilhán. Genesis and geomorphic evolution of the Velké pinky stopes in the Zlatohorská Highlands, Eastern Sudetes. Geomorphology. 2017; 296 ():91-103.

Chicago/Turabian Style

Jan Lenart; Radek Tichavský; Josef Večeřa; Veronika Kapustová; Karel Šilhán. 2017. "Genesis and geomorphic evolution of the Velké pinky stopes in the Zlatohorská Highlands, Eastern Sudetes." Geomorphology 296, no. : 91-103.

Journal article
Published: 01 October 2017 in Quaternary Geochronology
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ACS Style

Radek Tichavský; Karel Šilhán; Markus Stoffel. Age-dependent sensitivity of trees disturbed by debris flows – Implications for dendrogeomorphic reconstructions. Quaternary Geochronology 2017, 42, 63 -75.

AMA Style

Radek Tichavský, Karel Šilhán, Markus Stoffel. Age-dependent sensitivity of trees disturbed by debris flows – Implications for dendrogeomorphic reconstructions. Quaternary Geochronology. 2017; 42 ():63-75.

Chicago/Turabian Style

Radek Tichavský; Karel Šilhán; Markus Stoffel. 2017. "Age-dependent sensitivity of trees disturbed by debris flows – Implications for dendrogeomorphic reconstructions." Quaternary Geochronology 42, no. : 63-75.

Journal article
Published: 01 September 2017 in Geomorphology
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ACS Style

Tomáš Galia; Karel Šilhán; Virginia Ruiz-Villanueva; Radek Tichavský; Markus Stoffel. Temporal dynamics of instream wood in headwater streams draining mixed Carpathian forests. Geomorphology 2017, 292, 35 -46.

AMA Style

Tomáš Galia, Karel Šilhán, Virginia Ruiz-Villanueva, Radek Tichavský, Markus Stoffel. Temporal dynamics of instream wood in headwater streams draining mixed Carpathian forests. Geomorphology. 2017; 292 ():35-46.

Chicago/Turabian Style

Tomáš Galia; Karel Šilhán; Virginia Ruiz-Villanueva; Radek Tichavský; Markus Stoffel. 2017. "Temporal dynamics of instream wood in headwater streams draining mixed Carpathian forests." Geomorphology 292, no. : 35-46.

Journal article
Published: 01 February 2017 in Science of The Total Environment
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Hydro-geomorphic processes have significantly influenced the recent development of valley floors, river banks and depositional forms in mountain environments, have caused considerable damage to manmade developments and have disrupted forest management. Trees growing along streams are affected by the transported debris mass and provide valuable records of debris flow/flood histories in their tree-ring series. Dendrogeomorphic approaches are currently the most accurate methods for creating a chronology of the debris flow/flood events in forested catchments without any field-monitoring or a stream-gauging station. Comprehensive studies focusing on the detailed chronology of hydro-geomorphic events and analysis of meteorological triggers and weather circulation patterns are still lacking for the studied area. We provide a spatio-temporal reconstruction of hydro-geomorphic events in four catchments of the Hrubý Jeseník Mountains, Czech Republic, with an analysis of their triggering factors using meteorological data from four nearby rain gauges. Increment cores from 794 coniferous trees (Picea abies [L.] Karst.) allowed the identification of 40 hydro-geomorphic events during the period of 1889-2013. Most of the events can be explained by extreme daily rainfalls (≥50mm) occurring in at least one rain gauge. However, in several cases, there was no record of extreme precipitation at rain gauges during the debris flow/flood event year, suggesting extremely localised rainstorms at the mountain summits. We concluded that the localisation, intensity and duration of rainstorms; antecedent moisture conditions; and amount of available sediments all influenced the initiation, spatial distribution and characteristics of hydro-geomorphic events. The most frequent synoptic situations responsible for the extreme rainfalls (1946-2015) were related to the meridional atmospheric circulation pattern. Our results enhance current knowledge of the occurrences and triggers of debris flows/floods in the Central European mountains in transition between temperate oceanic and continental climatic conditions and may prompt further research of these phenomena in the Eastern Sudetes in general.

ACS Style

Radek Tichavský; Karel Šilhán; Radim Tolasz. Tree ring-based chronology of hydro-geomorphic processes as a fundament for identification of hydro-meteorological triggers in the Hrubý Jeseník Mountains (Central Europe). Science of The Total Environment 2017, 579, 1904 -1917.

AMA Style

Radek Tichavský, Karel Šilhán, Radim Tolasz. Tree ring-based chronology of hydro-geomorphic processes as a fundament for identification of hydro-meteorological triggers in the Hrubý Jeseník Mountains (Central Europe). Science of The Total Environment. 2017; 579 ():1904-1917.

Chicago/Turabian Style

Radek Tichavský; Karel Šilhán; Radim Tolasz. 2017. "Tree ring-based chronology of hydro-geomorphic processes as a fundament for identification of hydro-meteorological triggers in the Hrubý Jeseník Mountains (Central Europe)." Science of The Total Environment 579, no. : 1904-1917.

Journal article
Published: 01 February 2017 in Cold Regions Science and Technology
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ACS Style

Karel Šilhán; Radek Tichavský. Snow avalanche and debris flow activity in the High Tatras Mountains: New data from using dendrogeomorphic survey. Cold Regions Science and Technology 2017, 134, 45 -53.

AMA Style

Karel Šilhán, Radek Tichavský. Snow avalanche and debris flow activity in the High Tatras Mountains: New data from using dendrogeomorphic survey. Cold Regions Science and Technology. 2017; 134 ():45-53.

Chicago/Turabian Style

Karel Šilhán; Radek Tichavský. 2017. "Snow avalanche and debris flow activity in the High Tatras Mountains: New data from using dendrogeomorphic survey." Cold Regions Science and Technology 134, no. : 45-53.

Journal article
Published: 01 December 2016 in Geografiska Annaler: Series A, Physical Geography
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Debris flows and debris floods cause frequent geomorphic hazards, even in the mid‐mountains of Central Europe. In the Hrubý Jeseník Mountains (Eastern Sudetes, Czech Republic), strong anthropogenic interventions have created specific conditions for erosion, transport and accumulation of material released by debris flow/flood events. We present a detailed spatio‐temporal reconstruction of the hydro‐geomorphic process activity in two adjacent sub‐catchments using dendrogeomorphic methods applied to the steep, narrow channels. An analysis of 172 sampled trees [Picea Abies (L.) Karst.] revealed 14 torrential events since 1943 in the Klepáčský stream sub‐catchment and 11 events since 1897 in the Keprnický stream sub‐catchment. Identical events were identified in 1965, 1991, 1997, 2002 and 2010. The event return periods were comparable with return periods from the foothills of the European Alps. A higher frequency of events in the first sub‐catchment may be caused by the presence of a deep‐seated landslide, steeper slopes and a higher susceptibility to shallow slope deformations. Different spatial patterns of events were presented using the Kernel Density analysis in ArcMap 10.1. Clusters of affected trees in the valley floor during the last decades may be due to increased erosion below the check dams and increased accumulation above. The presence of check dams and slope stabilization works since the 1960s has mitigated the processes in several gullies, but due to the current non‐interventional management, the risk of their damage is increasing, particularly when increased activity is observed in the adjacent unprotected gullies.

ACS Style

Radek Tichavský; Karel Šilhán. Spatio‐temporal specifics of hydro‐geomorphic processes in headwater parts of mid‐mountains reconstructed based on tree‐ring data: a case study from the hrubý jeseník mountains (czech republic). Geografiska Annaler: Series A, Physical Geography 2016, 98, 369 -388.

AMA Style

Radek Tichavský, Karel Šilhán. Spatio‐temporal specifics of hydro‐geomorphic processes in headwater parts of mid‐mountains reconstructed based on tree‐ring data: a case study from the hrubý jeseník mountains (czech republic). Geografiska Annaler: Series A, Physical Geography. 2016; 98 (4):369-388.

Chicago/Turabian Style

Radek Tichavský; Karel Šilhán. 2016. "Spatio‐temporal specifics of hydro‐geomorphic processes in headwater parts of mid‐mountains reconstructed based on tree‐ring data: a case study from the hrubý jeseník mountains (czech republic)." Geografiska Annaler: Series A, Physical Geography 98, no. 4: 369-388.

Journal article
Published: 01 December 2016 in CATENA
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ACS Style

Radek Tichavský; Karel Šilhán. The changing ability of Norway spruce (P. abies) to record hydro-geomorphic processes based on the age and diameter of the tree stem – A dendrogeomorphic approach. CATENA 2016, 147, 469 -480.

AMA Style

Radek Tichavský, Karel Šilhán. The changing ability of Norway spruce (P. abies) to record hydro-geomorphic processes based on the age and diameter of the tree stem – A dendrogeomorphic approach. CATENA. 2016; 147 ():469-480.

Chicago/Turabian Style

Radek Tichavský; Karel Šilhán. 2016. "The changing ability of Norway spruce (P. abies) to record hydro-geomorphic processes based on the age and diameter of the tree stem – A dendrogeomorphic approach." CATENA 147, no. : 469-480.

Journal article
Published: 01 August 2016 in CATENA
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ACS Style

Karel Šilhán; Radek Tichavský. Recent increase in debris flow activity in the Tatras Mountains: Results of a regional dendrogeomorphic reconstruction. CATENA 2016, 143, 221 -231.

AMA Style

Karel Šilhán, Radek Tichavský. Recent increase in debris flow activity in the Tatras Mountains: Results of a regional dendrogeomorphic reconstruction. CATENA. 2016; 143 ():221-231.

Chicago/Turabian Style

Karel Šilhán; Radek Tichavský. 2016. "Recent increase in debris flow activity in the Tatras Mountains: Results of a regional dendrogeomorphic reconstruction." CATENA 143, no. : 221-231.

Journal article
Published: 12 October 2015 in Geoscience Research Reports
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Website of Zpravy o geologickych vyzkumech

ACS Style

Radek Tichavský; Karel Šilhán. Reconstruction of the debris flow track in the Keprnický potok catchment (Hrubý Jeseník Mts.) based on dendrogeomorphic methods. Geoscience Research Reports 2015, 2014, 65 -70.

AMA Style

Radek Tichavský, Karel Šilhán. Reconstruction of the debris flow track in the Keprnický potok catchment (Hrubý Jeseník Mts.) based on dendrogeomorphic methods. Geoscience Research Reports. 2015; 2014 ():65-70.

Chicago/Turabian Style

Radek Tichavský; Karel Šilhán. 2015. "Reconstruction of the debris flow track in the Keprnický potok catchment (Hrubý Jeseník Mts.) based on dendrogeomorphic methods." Geoscience Research Reports 2014, no. : 65-70.

Journal article
Published: 01 October 2015 in Geomorphology
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ACS Style

Radek Tichavský; Karel Šilhán. Dendrogeomorphic approaches for identifying the probable occurrence of debris flows and related torrential processes in steep headwater catchments: The Hrubý Jeseník Mountains, Czech Republic. Geomorphology 2015, 246, 445 -457.

AMA Style

Radek Tichavský, Karel Šilhán. Dendrogeomorphic approaches for identifying the probable occurrence of debris flows and related torrential processes in steep headwater catchments: The Hrubý Jeseník Mountains, Czech Republic. Geomorphology. 2015; 246 ():445-457.

Chicago/Turabian Style

Radek Tichavský; Karel Šilhán. 2015. "Dendrogeomorphic approaches for identifying the probable occurrence of debris flows and related torrential processes in steep headwater catchments: The Hrubý Jeseník Mountains, Czech Republic." Geomorphology 246, no. : 445-457.