Floating particle trapping and diffusion in vegetated open channel flow

被引:35
作者
Defina, Andrea [1 ]
Peruzzo, Paolo [1 ]
机构
[1] Univ Padua, Dipartimento Ingn Idraul Marittima Ambientale & G, I-35131 Padua, Italy
关键词
SALT-MARSH VEGETATION; SEED DISPERSAL; EMERGENT VEGETATION; REYNOLDS-NUMBER; SUITABILITY; HALOPHYTES; TRANSPORT; SEDIMENT; CYLINDER; RIVERS;
D O I
10.1029/2010WR009353
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
In this paper we present early results of laboratory experiments to investigate the transport and diffusion of floating particles (e.g., buoyant seeds) in open channel flow with emergent vegetation. The experiments are aimed at providing a better understanding of the relevant particle-vegetation interaction mechanisms responsible for the observed diffusion processes. Qualitative observational data are then used to set up a stochastic model for floating particle transport and diffusion. Quantitative observations, such as the distribution of distances travelled by a particle before it is permanently captured by a plant and the arrival-time distributions at prescribed cross sections along the vegetated test section, are instead used to calibrate and validate the model. The comparison between theoretical predictions and experimental results is quite satisfactory and suggests that the observed relevant aspects of the particle-vegetation interaction processes are properly described in the model.
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页数:10
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