Record details

Title
    Extreme events in the Sudetes Mountains. Their long-term geomorphic impact and possible controlling factors
Statement of responsibility
    Piotr Migoň, Mojmír Hrádek, Krzysztof Parzóch
Author
    Hrádek, Mojmír
    Migoń, Piotr
    Parzóch, Krzysztof
Language
    anglicky
Source title - serial
    Studia geomorphologica carpatho-balcanica
Vol./nr.
    Vol. 36
Pages
    p. 29-49
Year
    2002
Notes
    5 obr., 3 fot., 1 tab., 2 s. bibl.
    il.
    Zkr. název ser.: Stud. geomorphol. carpatho-balcanica
Subject group
    eroze
    geomorfologie
    historie
    koryto
    kvartér
    kvartér oblastí kontinentálního zalednění Českého masivu
    lidské aktivity
    odlesňování
    pohoří
    povodeň
    sesuv
    suťový proud
    svah
Geographical name
    Česká republika
    Hrubý Jeseník
    Karlovice (Bruntál)
    Krkonoše
    Martinkovice (Náchod)
    Polsko - jihozápad
Keyword
    Controlling
    Events
    Extreme
    Factors
    Geomorphic
    Impact
    Long-term
    Mountains
    Possible
    Sudetes
Abstract (in english)
   In the paper we review extreme geomorphological events in the Sudetes Mountains and discuss their formative role in the long-term landform evolution and factors controlling their occurrence. Extreme phenomena of significant geomorphic impact include debris flows, landslides, gully erosion and floods, all being generated by episodes of heavy rainfall in spring or summer season. Debris flows play an important part in the evolution of mountain slopes, yet they are spatially restricted to two highest mountain ranges within the Sudetes, Karkonosze and Hrubý Jeseník, both formerly glaciated and currently elevated above the timberline. Landslides are rare and disfavoured by geological structure and insufficient regolith thickness. Valley floors affected by big floods are the most dynamic environment and numerous erosional and depositional effects accompany each major flood.
   River behaviour during floods indicates the tendency towards recreating braided patterns which existed prior to the onset of extensive human colonization and land use changes. However, newly created landforms are usually quickly obliterated by humans and geomorphic long-term impact of extreme events is thus considerably reduced. The primary factor controlling the occurrence and effects of extreme geomorphic events in the Sudetes appears to be human impact, chiefly extensive deforestation of mountain slopes and associated alteration of hydrological regimes. No unquestionable evidence exists to argue about increasing frequency and magnitude of extreme events in the last few decades, nor about effects of any directional climate change
Contributor
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
    U
Entered date
    29. 1. 2008
Import date
    8. 8. 2012