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Type of publication: research article
Field of Science: Aplinkos inžinerija / Environmental engineering (T004)
Author(s): Kutra, Saulius
Title: Relation between nitrate concentration and water runoff in Lithuanian middle-sized river: the Šušvė case study
Other Title: Vandens nuotėkio ir nitratų koncentracijos ryšys vidutinio dydžio Lietuvos upėje (Šušvėje)
Is part of: Water management engineering. , Vol. 3 (6) (2006)
Extent: p. 78-84
Date: 2006
Keywords: Nitratų koncentracija;Nuotėkis;Vandens tarša;Nitrate concentration;Runoff;Water pollution
Abstract: The paper presents the study results and analysis of the relationship between nitrate concentration and water runoff in the river Šušvė within the period of 1992–2004. Both nitrate concentration and runoff changes during a year take a form of sinusoid curve. During the cold season of the year (November–April) the concentration was on the average 1.2–2.1 times higher than in the warm season (May–September). Dependence of the average nitrate concentration on the runoff is expressed by second degree polynomials. Maximum values of concentrations were observed when the annual average runoff was 12 l s-1 km-2 and the discharges during the cold and warm periods were 12 l s-1 km-2 and 8 l s-1 km-2 respectively. The annual distribution of nitrate concentrations is close to Weibull and corresponds to inherent distribution of water runoff from watershed. There exists a relationship between the runoff and nitrate concentration probability. Higher runoff predicts probability for higher concentration to occur. A mode of the concentration in river Šušve is 3–4 mg l-1. Based on the results from this study, river Šušvė pollution can be predicted on a basis of the river water discharge
Affiliation(s): Vytauto Didžiojo universitetas
Žemės ūkio akademija
Appears in Collections:Universiteto mokslo publikacijos / University Research Publications

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