Frequency of fast geomorphological processes in high-gradient streams: case study from the Moravskoslezské Beskydy Mts (Czech Republic) using dendrogeomorphic methods

• Autorzy: Šilhán K.
• Języki publikacji: EN

Abstrakty

EN

High-gradient streams are localities with the most dynamic activity of geomorphological processes in medium-high mountains. This study of the frequency of floods and debris flows in a se-lected high-gradient stream in the Moravskoslezské Beskydy Mts was based on a dendrogeomorphic approach. It makes use of the most accurate methods applied in the dating of historic geomorphologi-cal processes. Individual events were reconstructed on the basis of the dating of various growth dis-turbances displayed in 99 samples taken from 56 predominantly broad-leaved trees. As for the studied area, 26 years out of the last 113 years have been identified as years of rapid geo-morphological processes. The frequency of the processes has been high above average since the 1970s. A majority of the events can be considered as flash floods. Debris flows, which can only be observed sporadically, originate due to the reactivation of old accumulation material that subsequent-ly ends up re-accumulated on the alluvial fan at the mouth of a stream. A large number of events oc-cur in connection with extreme short-term precipitation in summer months. In addition, they are af-fected by fast snow melting in spring, which has also been proved by intra-seasonal dating of selected events.

Słowa kluczowe

EN

dendrogeomorphology; high-gradient stream; debris flow; flood; Moravskoslezské Beskydy Mts.

• Wydawca: De Gruyter
• Czasopismo: Geochronometria
• Rocznik: 2012
• Tom: Vol. 39, no. 2
• Strony: 122--132
• Opis fizyczny: Bibliogr. 29 poz., rys., wykr.

Twórcy

autor

Šilhán K.

• Department of Physical Geography and Geoecology, University of Ostrava, Chittussiho 10, Ostrava – Slezská Ostrava, 710 00,

Bibliografia

• Alestalo J, 1971. Dendrochronological interpretation of geomorphic processes. Fennia 105: 1-139.
• Bollschweiler M, Stoffel M and Schneuwly DM, 2008. Dynamics in debris-flow activity on a forested cone – A case study using differ-ent dendroecological approaches. Catena 72: 67-78, DOI 10.1016/j.catena.2007.04.004.
• Bollschweiler M and Stoffel M, 2010a. Tree rings and debris flows: recent developments, future directions. Progress in Physical Ge-ography 34: 625-645, DOI 10.1177/0309133310370283.
• Bollschweiler M and Stoffel M, 2010b. Variations in debris-flow occur-rence in an Alpine catchment – A reconstruction based on tree rings. Global and Planetary Change 73: 186-192, DOI 10.1016/j.gloplacha.2010.05.006.
• Bollschweiler M, Stoffel M and Schläppy R, 2011. Debris-flood recon-struction in a pre-alpine catchment in Switzerland based on tree-ring records of coniferous and broadleaved trees. Geografiska An-naler A 93: 1-15, DOI 10.1111/j.1468-0459.2011.00001.x.
• Brázdil R, Březina L, Dobrovolný P. Dobrovský M, Halásová O, Hostýnek J, Chromá K, Janderková J, Kaláb Z, Keprtová K, Kirchner K, Kotyza O, Krejčí O, Kunc J, Lacina J, Lepka Z, Létal A, Macková J, Máčka Z, Mulíček O, Roštínský P, Ře-hánek T, Seidenglanz D, Semerádová D, Sokol Z, Soukalová E, Štekl J, Trnka M, Valášek H, Věžník A, Voženílek V and Žalud Z, 2007. Vybrané přírodní extrémy a jejich dopady na Moravě a ve Slezsku (Selected natural extremes and their impacts in Moravia and Silesia). Brno, Praha, Ostrava, Masarykova universita, Český hydrometeorologický ústav, Ústav geoniky Akademie věd ČR: 432pp (in Czech).
• Gottesfeld AS and Johnson-Gottesfeld LM, 1990. Floodplain dynamics of a wandering river, dendrochronology of the Morice River, Brit-ish Columbia, Canada. Geomorphology 3: 159-179, DOI 10.1016/0169-555X(90)90043-P.
• Hrádek M and Malik I, 2007. Dendrochronological records of the floodplain morphology transformation of Desná river Halley in the last 150 years, The Hrubý Jeseník Mts. (Czech republic). Moravi-an Geographical reports 15: 2-15.
• Hupp CR and Bazemore DE, 1993. Temporal and spatial patterns of wetland sedimentation, West Tennessee. Journal of Hydrology 141: 179-196, DOI 10.1016/0022-1694(93)90049-F.
• Larsen IJ, Pederson JL and Schmidt JC, 2006. Geologic versus wildfire controls on hillslope processes and debris flow initiation in the Green River canyons of Dinosaur National Monument. Geomor-phology 81: 114-127, DOI 10.1016/j.geomorph.2006.04.002.
• Lehotský M, Novotný J, Szmańda JB and Fresková A, 2010. A subur-ban inter-dike river reach of a large river: Modern morphological and sedimentary changes (the Bratislava reach of the Danube Riv-er, Slovakia). Geomorphology 117: 298-308, DOI 10.1016/j.geomorph.2009.01.018.
• Malik I, 2006. Gully erosion dating means of anatomical changes in exposed roots (Proboszczowicka plateau, southern Poland). Geo-chronometria 25: 57-66.
• Malik I and Owczarek P, 2009. Dendrochronological records of debris flow and avalanche activity in a mid-mountain forest zone (eastern Sudetes – central Europe). Geochronometria 34: 57-66, DOI 10.2478/v10003-009-0011-7.
• Mayer B, Stoffel M, Bollschweiler M, Hübl J and Rudolf-Miklau F, 2010. Frequency and spread of debris floods on fans: A dendroge-omorphic case study from a dolomite catchment in the Austrian Alps. Geomorphology 118: 199-206, DOI 10.1016/j.geomorph.2009.12.019.
• Menčík E, Adamová M, Dvořák J, Dudek A, Jetel J, Jurková A, Hanzlíková E, Houša V, Peslová H, Rybářová L, Šmíd B, Šebesta J, Tyráček J and Vašíček Z, 1983. Geologie Moravskoslezských Beskyd a Podbeskydské pahorkatiny (Geology of the Mo-ravskoslezské Beskydy Mts and the Podbeskydská upland). Praha, Ústřední ústav geologický: 304pp (in Czech).
• Pánek T, Hradecký J, Minár J, Hungr O and Dušek R, 2009. Late Holo-cene catastrophic slope collapse affected by deep-seated gravita-tional deformation in flysch: Ropice Mountain, Czech Republic. Geomorphology 103: 414-429, DOI 19.1016/j.geomorph.2008.07.012.
• Pelfini M and Santilli M, 2008. Frequency of debris flows and their relation with precipitation: A case study in the Central Alps, Italy. Geomorphology 101: 721-730, DOI 10.1016/j.geomorph.2008.04.002.
• Perret S, Stoffel M and Kienholz H, 2006. Spatial and temporal rockfall activity in a forest stand in the Swiss Prealps – A dendrogeomor-phological case study. Geomorphology 74: 219-231, DOI: 10.1016/j.geomorph.2005.08.009.
• Ruiz-Villanueva V, Díez-Herrero A, Stoffel M, Bollschweiler M, Bodoque JM and Ballesteros JA, 2010. Dendrogeomorphic analy-sis of flash floods in a small ungauged mountain catchment (Cen-tral Spain). Geomorphology 118: 383-392, DOI 10.1016/j.geomorph.2010.02.006.
• Shroder JF, 1978. Dendrogeomorphological analysis of mass movement on Table Cliffs Plateau, Utah. Quaternary Research 9: 168-185, DOI 10.1016/0033-5894(78)90065-0.
• Schneuwly DM and Stoffel M, 2008. Tree-ring based reconstruction of the seasonal timing, major events and origin of rockfall on a case-study slope in the Swiss Alps. Natural Hazards and Earth System Sciences 8: 203-211.
• Schweingruber FH, Eckstein D, Serre-Bachet F and Braker OU, 1990. Identification, presentation and interpretation of event years and pointer years in dendrochronology. Dendrochronologia 8: 9-38.
• Schweingruber FH, 1996. Tree rings and environment, dendroecology. Wien, Haupt Verlag: 609pp.
• Stoffel M and Bollschweiler M, 2008. Tree-ring analysis in natural hazards research – an overview. Natural hazards and earth system sciences 8: 187-202.
• Šilhán K and Pánek T, 2010. Fossil and recent debris flows in medium–high mountains (Moravskoslezské Beskydy Mts, Czech Republic). Geomorphology 124: 238-249, DOI 10.1016/j.geomorph.2010.03.026.
• Šilhán K, Brázdil R, Pánek T, Dobrovolný P, Kašičková L, Tolasz R, Turský O and Václavek M, 2011. Evaluation of meteorological controls of reconstructed rockfall activity in the Czech Flysch Car-pathians. Earth Surface Processes and Landforms 36: 1898-1909, DOI 10.1002/esp.2211.
• Van Den Eeckhaut M, Muys B, Van Loy K, Poesen J and Beeckman H, 2009. Evidence for repeated re-activation of old landslides under forest. Earth Surface Processes and Landforms 34: 352-365, DOI 10.1002/esp.1727.
• V.I.A.S., 2005. Vienna Institute of Archaeological Science, Time Table. Installation and instruction manual. Ver. 2.1, Vienna
• Zielonka T, Holeksa J and Ciapała S, 2008. A reconstruction of flood events using scarred trees in the Tatra Mountains, Poland. Dendro-chronologia 26: 173-183, DOI 10.1016/j.dendro.2008.06.003.