Author(s): Takayuki Tanaka, Terunori Ohmoto
Linked Author(s): Takayuki Tanaka
Keywords: Vegetation, cavity flow, flow resistance, turbulent flow structure, dynamic pressure
Abstract: River vegetation fosters a rich ecological environment and creates a friendly riverside environment. Importance is attached, therefore, to the question of what vegetation should be like when designing and improving river channels. In view of concerns and problems such as the diversity of rivers, continuity of ecosystems and the deterioration of water quality that have been caused by stagnant water in vegetation communities, it is desirable that regions where the exchange of flows with the main flow region are promoted be provided. In this paper, the influence that arrangement patterns of longitudinal discontinuous vegetation zones gave to the flow resistance and turbulent structure in an open-channel is examined experimentally. Results showed that the relationship between flow depth and discharge significantly depends on the arrangement patterns and the reason could be explained by the difference of turbulent structure and spatial gradient?of the dynamic pressure
Year: 2017