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Wyszukujesz frazę "sediment transport models" wg kryterium: Temat


Wyświetlanie 1-2 z 2
Tytuł:
Transport of Fine Sediments in MarineWaterbodies Near River Mouths: Preliminary Results
Autorzy:
Cerkowniak, G. R.
Kowalewski, M.
Powiązania:
https://bibliotekanauki.pl/articles/241317.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Instytut Budownictwa Wodnego PAN
Tematy:
SPM
flocculation
sediment transport models
turbulence
Opis:
Transport of fine sediments depends mainly on the efficiency of flocculation. Flocculation, understood as the result of simultaneous processes of aggregation of particles and floc break-up, is a common phenomenon in marine environments. It is typical of fine sediments. This study presents a mathematical model of fine sediment transport. A model of flocculation is an important part of this model. Its main assumption is that flocculation is governed by turbulence. The model was qualitatively tested in a simplified theoretical waterbody. Such factors as the wind direction, wind speed, river discharge and concentration of suspension in the river were investigated. The results show that the proposed model describes reasonably well the lithodynamic processes characteristic of fine flocculating sediments. Thus it seems possible to apply it for description of fine sediment transport under real wave–current conditions that occur in many marine waterbodies near river mouths.
Źródło:
Archives of Hydro-Engineering and Environmental Mechanics; 2018, 65, 4; 255-275
1231-3726
Pojawia się w:
Archives of Hydro-Engineering and Environmental Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wave-induced bedload transport – a study of the southern Baltic coastal zone
Autorzy:
Dudkowska, A.
Gic-Grusza, G.
Powiązania:
https://bibliotekanauki.pl/articles/94655.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
sediment transport models
non-cohesive sediments
bottom shear stress
northern Europe
modele transportu osadów
nierówne osady
naprężenie ścinające
północna Europa
Opis:
The wave-induced bedload transport and spatial distribution of its magnitude in the southern Baltic coastal zone of Poland are estimated. The vicinity of Lubiatowo was selected as a representative part of the Polish coast. It was assumed that transport is a function of shear stress; alternative approaches, based on force balances and discharge relationships, were not considered in the present study. Four models were studied and compared over a wide range of bottom shear stress and wind-wave conditions. The set of models comprises classic theories that assume a simplified influence of turbulence on sediment transport (e.g., advocated by authors such as Du Boys, Meyer-Peter and Müller, Ribberink, Engelund and Hansen). It is shown that these models allow to estimate transport comparable to measured values under similar environmental conditions. A united general model for bedload transport is proposed, and a set of maps of wave bedload transport for various wind conditions in the study area is presented.
Źródło:
Geologos; 2017, 23, 1; 1-14
1426-8981
2080-6574
Pojawia się w:
Geologos
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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