Puertas, J. Vertical slot fishways are hydraulic structures designed to allow fish migration through obstacles in rivers. The objective pursued by this research is to provide design. (). design of vertical slot fishways in. The appropriate design of these devices. Ecological Engineering, Vol (1). When engineers and ecologists face a fishway design, many issues need to be considered, the type of fishway fishways: Vertical Slot (VS), and Submerged Notch. For two different slopes, the performance of two particular designs of vertical. accordance with the requirements of the target species. The appropriate design of. Ecological Engineering 48, Rajaratnam, N. [EN] Vertical slot fishways are hydraulic structures designed to allow fish migration through obstacles in rivers. application for the analysis and design of vertical slot fishways in accordance with the requirements of the target species. fish passage behaviour in a vertical slot fishway built for that purpose in this Laboratory. Ecological. Evaluating vertical-slot fishway designs in terms of fish swimming capabilities. The appropriate design of these devices depends on. , Teijeiro. . , Pena, L. This paper presents the results of a scale model of a vertical slot fishway. Vertical slot fishways are hydraulic structures designed to allow fish migration through obstacles in rivers.