Aquatic vegetation in rivers and coastal regions controls the flow structure in terms of mean velocity and turbulence. The vegetation in the flow affects the transportation of nutrients, microbes, dissolved oxygen, sediment, and contaminants; therefore, the flow characteristics of different types of vegetation layers should be examined in order to understand the effects of vegetation on the flow structure. In this paper, the effect of the submergence ratio and SVF (Solid Volume of Fraction) of a vegetation patch, which was present across half of the channel in a spanwise direction, on the flow structure at the wake region was examined. For this purpose, different submergence ratios with different SVFs were considered in the experiments, and velocity measurements were performed in the wake region of the vegetation layer with an Acoustic Doppler Velocimeter (ADV). According to the results, the effect of different vegetation heights and SVFs on the velocity distribution was obtained. Moreover, inflectional velocity distribution over the cross-section in the wake region of the vegetation layer was obtained, and it was concluded that jet flow occurred in the non-vegetated half of the channel due to the vegetation layer.

The purpose of this research is to study the dynamic responses of gravity quay walls with block type consisting of “three blocks” experimentally. For this purpose, 1g shaking table tests were conducted under different cyclic loadings for two different saturated granular backfill materials (Soil 1 and Soil 2). In this study, D_n50 of Soil 1 and Soil 2 are selected as 2.2 cm and 1.0 cm, respectively. During the experiments, accelerations, soil pressures and displacements were measured for each block. Test results pointed out that Soil 2 caused more damage on structures. The measurements for displacement and tilting of each block were discussed in view of “acceptable level of damage in performance-based design” given in PIANC (2001). The result of the study showed that the definitions of damaged levels given in PIANC (2001) were reliable for using in performance-based methods for seismic design of block type quay walls.

Bu çalışmada, deneysel olarak yapılan tam batmış bitkilerin açık kanal akımlarına olan etkisinin incelendiği bir çalışma, FLOW-3D ile modellenmiştir. Deney sonuçları ve sayısal model sonuçları karşılaştırılmıştır. Modellemede Yılmazer ve ark. [10] tarafından gerçekleştirilen deneye ait veriler kullanılmıştır.