Masayuki Nitta
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Research Subjects
Research Interests
Masayuki Nitta has a total of 3 co-authors. Here are the top co-authors by number of shared publications:
- Muneyuki Aoki
Department of Civil and Environment Engineering, Faculty of Science and Engineering, Toyo University, 2100 Kujirai, Kawagoe 350-8585, Saitama, Japan
1 shared publication - Taisei Sato
Department of Civil and Environment Engineering, Graduate School of Science and Engineering, Toyo University, 2100 Kujirai, Kawagoe 350-8585, Saitama, Japan
1 shared publication - Tomoaki Funakoshi
Department of Civil and Environment Engineering, Graduate School of Science and Engineering Graduated, Toyo University, Kawagoe 350-8585, Saitama, Japan
1 shared publication
Latest Publications
- Open Access
A Novel Roughness and Flow Pattern for Steep Stream-Type Fishways: Preliminary Insights
The purpose of this study was to allow fish to move upstream past barriers or difficult sections of passage, even on steep stream-type fishways. Therefore, the authors devised a roughness arrangement to raise the water depth in the fishway and reduce its flow velocity. Roughness was used as a group in the arrangement so as to expect afflux effects. Water depth was raised and the flow velocity was reduced around the roughness groups, which allowed fish to hold position and move upstream. Although rapid flow was locally formed in some spots in the fishway, its area was small, enabling the fish to move upstream sufficiently. The experimental results obtained in this study will be applied as a removable stream-type fishway to small channels, head constructions, and so on where fishways cannot be installed due to management.
Open AccessA Novel Roughness and Flow Pattern for Steep Stream-Type Fishways: Preliminary Insights
The purpose of this study was to allow fish to move upstream past barriers or difficult sections of passage, even on steep stream-type fishways. Therefore, the authors devised a roughness arrangement to raise the water depth in the fishway and reduce its flow velocity. Roughness was used as a group in the arrangement so as to expect afflux effects. Water depth was raised and the flow velocity was reduced around the roughness groups, which allowed fish to hold position and move upstream. Although rapid flow was locally formed in some spots in the fishway, its area was small, enabling the fish to move upstream sufficiently. The experimental results obtained in this study will be applied as a removable stream-type fishway to small channels, head constructions, and so on where fishways cannot be installed due to management.