The Significance of Log and Boulder Steps for Diversification of Fluvial Sediments Characteristics in a Stream Channel in a Small Forest Catchment in the Polish Carpathians

Ewa Słowik-Opoka , Anna Michno , Zhang Wenfang


The study presents the diversification of sediments deposited on log (LS), boulder (BS) and mixed-type (LBS) steps located in the channel of a stream in a small forest mountain catchment in the Polish Carpathians. The topic of sediment diversification in a stream channel is an important issue not only from the perspective of sediment transport process and shaping fluvial systems in forested catchments caused by woody or rock debris but also in the context of functioning of local ecosystems. We aimed to test the following hypothesis: the morphodynamic features of a stream channel and the type of steps therein significantly affect the diversification of the size and shape of mineral deposits and play an important role in the process of sediments transport and processing in the channels of small mountain streams. In order to verify the above hypothesis, sediments were sampled directly from the stream channel (Ch) in its longitudinal profile as well as upstream and downstream of steps (LS, BS and LBS) in the channel. The diversification of features of sediment grain size was analysed taking into account step type and sediment location in the longitudinal profile of the stream channel. The research was conducted separately for fine-grained sandstone (A) and coarse-grained sandstone (B). In addition, the basic sedimentological indicators and the shape parameter of the gravels, as described by the Zingg method, were determined. In order to determine the transport predisposition of the sediments in a specific load, an analysis of sediment distribution was performed on the C/M (C—first percentile and M—median) diagram. The PCA (Principal component analysis) analysis showed that the step type significantly affects the processing as well as the size and shape diversification of mineral deposits, which confirms our hypothesis. Therefore, this study is a contribution to the current knowledge on fluvial processes occurring in stream channels in small forest mountain catchments.
Author Ewa Słowik-Opoka (FoF / Department of Forest Utilization, Engineering and Forest Technology)
Ewa Słowik-Opoka,,
- Department of Forest Utilization, Engineering and Forest Technology
, Anna Michno - Jagiellonian University (UJ)
Anna Michno,,
, Zhang Wenfang - Chinese Academy of Sciences
Zhang Wenfang,,
Journal seriesForests, ISSN 1999-4907, (N/A 100 pkt)
Issue year2020
Publication size in sheets676
Keywords in EnglishForest; catchment; stream channel; log step; woody debris; sandstone; sediments; granulometric indicators
ASJC Classification1107 Forestry
Languageen angielski
LicenseJournal (articles only); author's original; Uznanie Autorstwa (CC-BY); after publication
The Significance of Log and Boulder Steps for Diversification of Fluvial Sediments Characteristics in a Stream Channel in a Small Forest Catchment in the Polish Carpathians of 16-06-2020
4,93 MB
Score (nominal)100
Score sourcejournalList
Publication indicators Scopus SNIP (Source Normalised Impact per Paper): 2018 = 0.943; WoS Impact Factor: 2018 = 2.116 (2) - 2018=2.453 (5)
Citation count*
Additional fields
FinansowanieThis research was funded by the President of the University of Agriculture in Krakow from the In‐ House Scholarship Fund for Academic Teachers of the University of Agriculture in Krakow; partially funded by The National Centre for Research and Development and Polish‐Norwegian Research Fund, grant number 209947/52/2013; and by Ekoenergia Silesia S.A., the owner of Park Technologiczny Ekoenergia—Woda— Bezpieczeństwo
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