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