Flow properties found in a deep open experiment channel with dense vegetation bank

Abstract

This paper presents the measurement results of turbulent velocity fields for flows in a deep open experiment channel with dense vegetation. The flows showed the strong 3-dimensional properties that the maximum flow directional velocity appears near the 1/3 water depth from the bottom and Reynolds stress become negative over the 2/3 water depth area. For the cause of the phenomena, transport of low velocity fluid by strong boils to go upward from the bottom near vegetation boundary was suggested from the distribution of turbulent flow energy.