In this paper, after a brief introduction on the quadrant analysis and its application to incipient sediment motion, its use in the case of vegetated channels is analyzed. In particular, the following cases are considered: a) a channel with plastic submerged vegetation; b) a channel with real submerged vegetation (sprouts of wheat); c) a channel with dunes and flexible vegetation patches; d) a channel with rigid submerged vegetation; e) a channel with flexible synthetic vegetation or flexible synthetic vegetation and wooded dowels that fill in the entire channel or arranged in patches, and f) a compound channel in which synthetic grass or rigid vegetation represented by sticks were placed in the floodplain area. It is shown how events (outward motion, ejections, inward motion, sweeps) vary along with the water depth, in the presence of uniformly distributed or patchy vegetation, with the size of the hole that separates the strong from the weak events, and the influence that they have on channel widening and solid transport.

Quadrant analysis of turbulence in vegetated channels

D’IPPOLITO A.;COSCARELLA F.;GAUDIO R.;PENNA N.
2023-01-01

Abstract

In this paper, after a brief introduction on the quadrant analysis and its application to incipient sediment motion, its use in the case of vegetated channels is analyzed. In particular, the following cases are considered: a) a channel with plastic submerged vegetation; b) a channel with real submerged vegetation (sprouts of wheat); c) a channel with dunes and flexible vegetation patches; d) a channel with rigid submerged vegetation; e) a channel with flexible synthetic vegetation or flexible synthetic vegetation and wooded dowels that fill in the entire channel or arranged in patches, and f) a compound channel in which synthetic grass or rigid vegetation represented by sticks were placed in the floodplain area. It is shown how events (outward motion, ejections, inward motion, sweeps) vary along with the water depth, in the presence of uniformly distributed or patchy vegetation, with the size of the hole that separates the strong from the weak events, and the influence that they have on channel widening and solid transport.
978-88-97181-86-6
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11770/342392
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