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2017 | Vol. 43, nr 3 | 81--91
Tytuł artykułu

Assessing the impact of the turbulence of river flow on variations in the concentrations of nutrients

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
The fourth-order stream of the Baltic Sea has been analysed, which is a tributary which remained in the riverbed as a result of natural river stretches not corresponding to the status of good water quality. The authors examined separate river stretches representing maximum changes in the hydraulic gradient and investigated the dependence of variations in the concentrations of biogenic nutrients on river flow velocity, i.e., turbulence, defining it by the Reynolds criterion. The calculation of the coefficient of self-purification provides that the river flowing downstream is 100% self-purified and removes all nitrates and 61% of phosphates. The content of dissolved oxygen at the confluence of the river in spring was by 5.5% larger than that at the headwaters, whereas in the summer season, the difference in the content of dissolved oxygen in river water between the headwaters and confluence increased and made 25%. The conducted research has disclosed that the dynamics of river flow affects water quality, and therefore, for selecting monitoring places, land use structure or economic entities situated around the sampling point as well as the nature of the river flow itself must be considered.
Wydawca

Rocznik
Strony
81--91
Opis fizyczny
Bibliogr. 19 poz., tab., rys.
Twórcy
  • Department of Water Engineering, Vilnius Gediminas Technical University, Saulėtekio al. 11, LT-10223 Vilnius, Lithuania
  • Department of Water Engineering, Vilnius Gediminas Technical University, Saulėtekio al. 11, LT-10223 Vilnius, Lithuania, andrius.litvinaitis@vgtu.lt
Bibliografia
  • [1] Baltic Sea Action Plan, HELCOM Ministerial Meeting, Cracow, Poland, 15 November 2007.
  • [2] WANG J., LIUB X.D., LUA J., Urban river pollution control and remediation, 18th Biennial ISEM Conference on Ecological Modelling for Global Change and Coupled Human and Natural System, 2012, 13, 1856.
  • [3] TIAN B., WALISER D.E., Chemical and biological impacts, Chapter 18 [in:] Intraseasonal Variability of the Atmosphere–Ocean System, 2nd Ed., Springer, Berlin 2012, 569
  • [4] KIEDRZYNSKA E., Quantification of phosphorus retention efficiency by floodplain vegetation and a management strategy for a eutrophic recervoir restoration, Ecol. Eng., 2008, 33 (1), 15.
  • [5] BAGDŽIŪNAITĖ-LITVINAITIENĖ L., LITVINAITIS A., Anthropogenic activity impact on the small river catchment water quality, 9th International Conference Environmental Engineering, Vilnius 2014, 1.
  • [6] VAIKASAS S., BAUBLYS R., GEGUZIS R., Riverbed stability assessment under Lithuanian conditions, International Conference Environmental Engineering, Vilnius 2014, 1.
  • [7] NILSSON C., RENOFALT B.M., Linking flow regime and water quality in rivers: a challenge to adaptive catchment management, Ecol. Soc., 2008, 13 (2), 18 [online]. Available at http://www.ecologyand society.org/articles/2588.html [accessed: 7 April 2015].
  • [8] SHIMIN T., ZHAOYIN W., HONGXIA S., Study of the self-purification of Juma river, Proc. Environ. Sci, 2011, 11, 1328.
  • [9] CAISSIE D., The thermal regime of rivers. A review, Freshwater Biol., 2006, 51, 1389.
  • [10] KERN U., WESTRICH B., Mobility of contaminants in the sediments of lock-regulated rivers – field experiments in the lock reservoir lauffen, modeling and estimation of the remobilisation risk of older sediment deposits, Final Report No. 96/23, Institute for Hydaulics, University of Stuttgart, 1996, 186 (in German).
  • [11] LYSIOVIENĖ J., Self-purification in pollution-exposed regulated streams in middle lithuania during low-flow regime periods, Ph.D. thesis, Aleksandro Stulginskis University, 2013 (in Lithuanian).
  • [12] TSUJIMOTO T., KITAMURA T., Velocity profile of flow in vegetated-bed channels, KHL Progressive Report, Hydraulics Laboratory, Kanazama University, Japan, 1990.
  • [13] ALIAN J.D., Stream ecology: Structure and function of running waters, Chapman and Hill., London 1995.
  • [14] BAGDŽIŪNAITĖ-LITVINAITIENĖ L., Research and assessment of changes in biogenic substances in the water of rivers, Ph.D. thesis, Vilnius Gediminas Technical University, 2005.
  • [15] TUMAS R., Lithuanian karst region rivers water ecology: hydrochemical and hydrobiological evaluation, Nordic Hydrol., 2003, 35 (1), 61.
  • [16] FLÖRKE M., BÄRLUND I., SCHNEIDER C., KYNAST E., Pan-European freshwater resources in a changing environment: how will the Black Sea region develop, Water Sci. Technol., 2012, 12 (5), 563.
  • [17] NILSSON C., MALM-RENÖFÄLT B., Linking flow regime and water quality in rivers. A challenge to adaptive catchment management, Ecol. Soc., 2008, 13 (2), 18.
  • [18] BUNN S.E., ARTHINGTON A.H., Basic Principles and Ecological Consequences of Altered Flow Regimes for Aquatic Biodiversity, Springer-Verlag, New York 2002, 30, 492.
  • [19] POFF N.L., ALLAN J.D., BAIN M.B., KARR J.R., PRESTEEGARD K.L., RITCHERT B.D., SPARKS R.E., STROMBERG G.J., The natural flow regime, BioSci., 1997, 47, 769.
Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.baztech-97446728-3711-4c05-97b9-2166c93ac51a
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