ABSTRACT
One of the common mitigation measures for increasing fish passage through culverts is the concept of increasing roughness by adding secondary elements, such as artificial baffles. Although field assessments of these baffled culverts have shown an increase in passage performance, specific numbers vary for different baffle sizes and different fish species. This highlights the importance of having an understanding of flow fields and their variation with shape and size of individual baffles for an efficient fish passage solution. Furthermore, we need to better understand the response of different fish species towards these altered flows. In this study, we concentrate on characterizing the flow field downstream of baffles for different baffle lengths. The preliminary results shows that the shorter baffle is likely to produce flow fields more suitable for small-bodied fish species compared to the tested longer baffle.
