Author(s): Toma Galia; Vaclav Karpich; Radek Tichavsk

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Abstract: We present a comparative study of large wood (LW) mobility in two steep channels (0.06< S< 0.20) of contrast European landscapes during major hydro-geomorphic events of similar magnitude. We investigated a headwater perennial stream draining Central European medium-highwere partially accompanied by debris-flood or debris-flow character ofGorge. Despite completely different characters of hydrologic regimes, riparian zones and valley confinement settings, living trees in the valley floor played crucial role in wood deposition and development of large jams in both environments. The trees living in the valley floor were the main source of LW in the studied Mediterranean channel, whereas long-term LW recruitment from very steep hillslopes or rock cliffs was quite negligible. On the other hand, previous windstorms in the Klepasky caused notable delivery of LW from adjacent hillslopes and LW recruitment by bank erosion occurred only at spatially-limited semiconfined parts of the valley.

DOI: https://doi.org/10.1051/e3sconf/20184002001

Year: 2018