Dissolved oxygen and water temperature dynamics in lowland rivers over various timescales

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Title:Dissolved oxygen and water temperature dynamics in lowland rivers over various timescales
Creators:
Rajwa-Kuligiewicz, Agnieszka; arajwa at igf dot edu dot pl; Institute of Geophysics, Polish Academy of Sciences, Centre for Polar Studies, Ks. Janusza 64, 01-452 Warsaw, Poland.
Bialik, Robert J.; Institute of Geophysics, Polish Academy of Sciences, Centre for Polar Studies, Ks. Janusza 64, 01-452 Warsaw, Poland.
Rowiński, Pawel M.; Institute of Geophysics, Polish Academy of Sciences, Centre for Polar Studies, Ks. Janusza 64, 01-452 Warsaw, Poland.
Journal or Publication Title:
Journal of Hydrology and Hydromechanics, 63, 4, pp. 353-363
Uncontrolled Keywords:dissolved oxygen, water temperature;, hysteresis, spectral analysis, self-similarity, anastomosing river, backwaters

Abstract

The impact of floodplain hydrology on the in-stream dissolved oxygen dynamics and the relation between dissolved oxygen and water temperature are investigated. This has been done by examining the time series of dissolved oxygen and water temperature coupled with meteorological and hydrological data obtained from two lowland rivers having contrasting hydrological settings. Spectral analysis of long-term oxygen variations in a vegetated river revealed a distinct scaling regime with slope ‘–1’ indicating a self-similar behaviour. Identical slopes were obtained for water temperature and water level. The same power-law behaviour was observed for an unvegetated river at small timescales revealing the underlying scaling behaviour of dissolved oxygen regime for different types of rivers and over various time scales. The results have shown that the oxygenation of a vegetated river is strongly related to its thermal regime and flow conditions. Moreover, analysis of short-term fluctuations in the unvegetated river demonstrated that physical factors such as rainfall and backwaters play a substantial role in the functioning of this ecosystem. Finally, the results show that the relation between water temperature and dissolved oxygen concentration at the diurnal timescale exhibits a looping behaviour on the variable plot. The findings of this study provide an insight into the sensitivity of rivers to changing hydro-physical conditions and can be useful in the assessment of environmental variability.

Official URL: http://147.213.145.2/vc/vc1.asp

Title:Dissolved oxygen and water temperature dynamics in lowland rivers over various timescales
Translated title:Dissolved oxygen and water temperature dynamics in lowland rivers over various timescales
Creators:
Rajwa-Kuligiewicz, Agnieszka; arajwa at igf dot edu dot pl; Institute of Geophysics, Polish Academy of Sciences, Centre for Polar Studies, Ks. Janusza 64, 01-452 Warsaw, Poland.
Bialik, Robert J.; Institute of Geophysics, Polish Academy of Sciences, Centre for Polar Studies, Ks. Janusza 64, 01-452 Warsaw, Poland.
Rowiński, Pawel M.; Institute of Geophysics, Polish Academy of Sciences, Centre for Polar Studies, Ks. Janusza 64, 01-452 Warsaw, Poland.
Uncontrolled Keywords:dissolved oxygen, water temperature;, hysteresis, spectral analysis, self-similarity, anastomosing river, backwaters
Subjects:T Technology > TA Engineering (General). Civil engineering (General)
Divisions:Mathematics, Physics and Earth Sciences > Institute of Hydrodynamics > Journal of Hydrology and Hydromechanics
Journal or Publication Title:Journal of Hydrology and Hydromechanics
Volume:63
Number:4
Page Range:pp. 353-363
ISSN:0042-790X
Publisher:Institute of Hydrology of the Slovak Academy of Sciences and the Institute of Hydrodynamics of the Academy of Sciences of the Czech Republic
Related URLs:
URLURL Type
http://avi.lib.cas.cz/node/55Publisher
ID Code:8500
Item Type:Article
Deposited On:10 Dec 2015 17:54
Last Modified:10 Dec 2015 16:54

Citation

Rajwa-Kuligiewicz, Agnieszka; Bialik, Robert J.; Rowiński, Pawel M. (2015) Dissolved oxygen and water temperature dynamics in lowland rivers over various timescales. Journal of Hydrology and Hydromechanics, 63 (4). pp. 353-363. ISSN 0042-790X

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