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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Water engineering : The variation of local scour pattern around representative natural vegetation
The variation of local scour pattern around representative natural vegetation
Author : ORAL YAGCI1), VASILEIOS KITSIKOUDIS(1), MEHMET FURKAN CELIK(2), CAN HODOGLU(1), V. S. OZGUR KIRCA(1), MANOUSOS
ABSTRACT
The flow-vegetation interaction is a complicated process, which is further exacerbated when it is studied on movable bed
resembling natural conditions. Nonetheless, developed scour patterns around instream vegetation are able to provide
useful information with regard to the physical processes and natural mechanisms occurring during such interactions.
The present experimental work investigates the scour patterns generated around several utilized obstacles to the flow
and examines the generated flow field in the vicinity of the scoured flume bed. The utilized obstacles are an emergent
rigid cylinder, an emergent array of smaller cylinders arranged in a circle with a diameter equal to that of rigid cylinder,
an emergent natural plant, and a submerged natural plant. All of these cases are studied for the similar discharge and
each case provided a distinct scour pattern, associated with the characteristics of the respective element. Subsequently,
in equilibrium conditions the bottom was scanned by a high resolution laser scanner. After the equilibrium conditions had
been attained the instantaneous flow velocity close to the bottom was measured three-dimensionally by means of a
Vectrino II acoustic Doppler profiler and the developed flow pattern is presented in terms of streamwise mean flow
velocity and turbulence kinetic energy profiles.
File Size : 773,735 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Water engineering
Date Published : 17/08/2015
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