Please use this identifier to cite or link to this item:https://hdl.handle.net/20.500.12259/82557
Type of publication: Straipsnis Clarivate Analytics Web of Science ar/ir Scopus / Article in Clarivate Analytics Web of Science or / and Scopus (S1)
Field of Science: Aplinkos inžinerija / Environmental engineering (T004)
Author(s): Vaikasas, Saulius;Dumbrauskas, Antanas
Title: Self-purification process and retention of nitrogen in floodplains of River Nemunas
Is part of: Hydrology Research. London: IWA Publishing., 2010, Vol. 41, No. 3-4
Extent: p. 338–345
Date: 2010
Note: Spausdinto leidinio ISSN 0029-1277
Keywords: Floodplain;Flow;Nitrogen;Retention;Sediment
Abstract: Due to its catchment size and its significant level of agricultural pollution, the Nemunas river basin has been identified as an agricultural hot spot in the Baltic Sea basin. On average, the total annual inorganic nitrogen runoff into the river is 26.9 × 106 kg, which corresponds to a load of 275 kg km-2 yr-1. A submerged floodplain, covering 605 km2 of the River Nemunas lowland, maintains the natural retention threshold for pollutants in the water of the main canal and the outfall at Curonian Lagoon, as well as improving farming conditions in the inundated meadows of the valley. It also increases the sedimentation and nitrogen retention capacities of the Nemunas catchment. It has been estimated that about 40% of the fine suspended sediments can be retained and deposited in the flooded meadows of the delta. Controlled inundation of the floodplains in the Nemunas delta may reduce its runoff nitrogen load by 21 kg km-2 per flood event. As a result, nitrogen concentration decreases by approximately 8–10%, causing a self-purification process in the flooded area. Nitrogen retention is dependent upon the velocities of the flood current and has mostly been observed in zones of stagnating water
Internet: https://iwaponline.com/hr/article-pdf/41/3-4/338/371009/338.pdf
Affiliation(s): Vytauto Didžiojo universitetas
Žemės ūkio akademija
Appears in Collections:Universiteto mokslo publikacijos / University Research Publications

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