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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): Rimkus, Alfonsas;Vaikasas, Saulius;Pukštas, Romas
Title: Calculation of suspended sediment deposition intensity in grass-covered floodplains
Is part of: Nordic hydrology. , Vol.38, Iss.2 (2007)
Extent: p. 151-163
Date: 2007
Keywords: Velocity distribution coefficients;Lined channels;Vegetation;Flow
Abstract: Flooded river valley meadows are very important for river ecology, as they entrap sediments and sediment-bound nitrogen or heavy metals. Nevertheless, the grass-covered floodplains, particularly in river deltas, are often separated from the rivers by dykes. When such systems are designed, it is necessary to model sediment deposition in these separated areas. However, the existing calculation methods and models are adapted for flow over the sandy bottom. In the meadow flows there are other boundary conditions more favourable for sediment deposition. The focus of our studies was the processes of suspended sediment deposition in the flooded delta of the River Nemunas. Calibration results of the mathematical model with common sediment deposition formulae for riverbed flows did not correspond to the data of measurements. The differences were obvious. Consequently, it was necessary to study the peculiarities of flow and sediment motion under these conditions, as well as to work out formulae suitable for calculations
Affiliation(s): Vytauto Didžiojo universitetas
Žemės ūkio akademija
Appears in Collections:Universiteto mokslo publikacijos / University Research Publications

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