Abstract
Spur dikes have been used as structures to suppress bank erosion by flood flow, waves generated by ship and to maintain flow depth for a navigation channel. Recently, it's noticed that they have functions to produce diversified attractive environments in river. In this study, experiments were executed to clarify water and momentum exchange between main flow and non-submerged spur-dikes region. The results showed that prominent water surface variations happened in an arrangement of spur-dikes and the variations obviously correlated with velocity fluctuations, but did not have influence on Reynolds stress. Key Plbrds: spur dikes, water surface oscillation, turbulence, momentum transport
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