Experimental Study on Influence of Different Patterns of an Emergent Vegetation Patch on the Flow Field and Scour/Deposition Processes in the Wake Region DOI Creative Commons
Oral Yağcı, V. Ş. Özgür Kırca,

Vasileios Kitsikoudis

et al.

Water Resources Research, Journal Year: 2023, Volume and Issue: 60(1)

Published: Dec. 29, 2023

Abstract Flume experiments were conducted to comprehend the impact of different patterns an emergent vegetation patch on flow field and scour process in natural rivers. Velocity measurements, visualization, tests undertaken around patterns, which simulated inspired by expansion a typical instream vegetation. The was idealized with initially circular rigid stems becoming elongated due positive negative feedbacks. considered occur three stages, density from previous stage increased while also connecting at its downstream side another sparser patch. These stages replicated succesively increasing elongating In this way, two processes (i.e., elongation decrease permeability), usually have hydrodynamically opposite effects fields, same obstruction. Despite generally obstacles being streamlined bodies, morphometric analysis obtained laser scanner revealed that permeable patches amplifies global enhances localization local hole. This situation implies as expands, wake region, steady‐wake region becomes shorter, turbulence diminishes, lateral shear stress enhances, deposition cannot far Consequently, hydrodynamic consequences may restrict further after certain length/density.

Language: Английский

Experimental Study on Influence of Different Patterns of an Emergent Vegetation Patch on the Flow Field and Scour/Deposition Processes in the Wake Region DOI Creative Commons
Oral Yağcı, V. Ş. Özgür Kırca,

Vasileios Kitsikoudis

et al.

Water Resources Research, Journal Year: 2023, Volume and Issue: 60(1)

Published: Dec. 29, 2023

Abstract Flume experiments were conducted to comprehend the impact of different patterns an emergent vegetation patch on flow field and scour process in natural rivers. Velocity measurements, visualization, tests undertaken around patterns, which simulated inspired by expansion a typical instream vegetation. The was idealized with initially circular rigid stems becoming elongated due positive negative feedbacks. considered occur three stages, density from previous stage increased while also connecting at its downstream side another sparser patch. These stages replicated succesively increasing elongating In this way, two processes (i.e., elongation decrease permeability), usually have hydrodynamically opposite effects fields, same obstruction. Despite generally obstacles being streamlined bodies, morphometric analysis obtained laser scanner revealed that permeable patches amplifies global enhances localization local hole. This situation implies as expands, wake region, steady‐wake region becomes shorter, turbulence diminishes, lateral shear stress enhances, deposition cannot far Consequently, hydrodynamic consequences may restrict further after certain length/density.

Language: Английский

Citations

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