Hydromorphologically-driven variability of thermal and oxygen conditions at the block ramp hydraulic structure: The Porębianka River, Polish Carpathians

Agnieszka Rajwa-Kuligiewicz , Artur Radecki-Pawlik , Tomasz Skalski , Karol Plesiński , Paweł M. Rowiński , Russell Manson


Growing anthropopressure in mountain streams aimed at limiting erosion and flood protection often caused adverse effects on the natural environment. In recent years, great attention has been paid to the restoration and conservation of natural habitats in mountain streams using environmentally friendly solutions such as the Block Ramp (BR) Hydraulic Structures. In this study we investigated the factors responsible for spatial variability in thermal and oxygen conditions at the single BR structure in the growing season, and the relation between water temperature and dissolved oxygen (DO) concentration. This has been done by measurements of hydraulic characteristics along with physicochemical properties of water, such as water temperature and DO concentration, at two different discharges. The redundancy analysis has been applied in order to describe the relationships among hydraulic parameters and physicochemical variables, and extract potential sources of water temperature and DO variability within the BR hydraulic structure. Results have shown that DO and water temperature distributions within the BR hydraulic structure depend on discharge conditions and are associated with the submergence of the block ramp. The highest heterogeneity in hydraulic, DO and water temperature conditions occurs at low flow and is associated with the presence of crevices between protruding cobbles at the block ramp. The lowest variability, in turn, occurs at high discharge, when the block ramp is completely submerged. The results indicated that thermal and oxygen conditions within the BR hydraulic structure are independent of hydraulic parameters at low flow. Moreover, the relation between DO concentration and water temperature is positive at low flow indicating potential impact of biological processes. On the contrary, at high discharge both, the DO concentrations and water temperature within the BR structure, depend on bed shear velocity and maximum Reynolds number.
Author Agnieszka Rajwa-Kuligiewicz - Uniwersytet Jagielloński
Agnieszka Rajwa-Kuligiewicz,,
, Artur Radecki-Pawlik - Politechnika Krakowska
Artur Radecki-Pawlik,,
, Tomasz Skalski - Silesian University of Technology (PolSL)
Tomasz Skalski,,
, Karol Plesiński (FoEEaLS / DoHEaG)
Karol Plesiński,,
- Department of Hydraulic Engineering and Geotechnics
, Paweł M. Rowiński - Polska Akademia Nauk
Paweł M. Rowiński,,
, Russell Manson - Stockton University
Russell Manson,,
Journal seriesScience of the Total Environment, ISSN 0048-9697, e-ISSN 1879-1026, (N/A 200 pkt)
Issue year2020
Publication size in sheets0.6
Article number136661
Keywords in EnglishBlock ramp hydraulic structures, Mountain stream, Dissolved oxygen, Water temperature, Bed shear velocity, Hyporheic exchange
ASJC Classification2304 Environmental Chemistry; 2305 Environmental Engineering; 2310 Pollution; 2311 Waste Management and Disposal
Languageen angielski
Score (nominal)200
Score sourcejournalList
Publication indicators WoS Citations = 0; Scopus SNIP (Source Normalised Impact per Paper): 2016 = 1.849; WoS Impact Factor: 2019 = 6.551 (2) - 2019=6.419 (5)
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