关键词: 局部流动, 河床变形, 清水冲刷, 不透水丁坝, 透水丁坝

Abstract: Groynes can be permeable and impermeable. To explore the influence of groyne on nearby flow under different working conditions, laboratory experiment, in which the groyne in the glass flume was scoured by clean water, was carried out. Combined with numerical model, complex local flow field and riverbed deformation were simulated. Results showed that impermeable groyne had greater separation angle, maximum scouring depth and scouring area than permeable groyne. This paper describes the morphological changes of riverbed with different types of groynes, which has reference value for groynes design and protection of river dikes.

Key words: local flow, riverbed deformation, clean water scouring, impermeable groyne, permeable groyne