IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Hydro-environment : Evaluation of ecohydraulic effectiveness of an artificial fish nest in an agricultural drainage cana...
Evaluation of ecohydraulic effectiveness of an artificial fish nest in an agricultural drainage canal
Author : SHIGEYA MAEDA(1), HIBIKI TANIGAWA(2) , KOSHI YOSHIDA(3) & HISAO KURODA(4)
ABSTRACT
Effectiveness of an artificial fish nest installed on the sidewall of an agricultural drainage canal made by concrete is evaluated
by observing the instantaneous current velocity and the water depth at various points in the canal. Using the obtained data,
the turbulent kinetic energy, the degree of turbulence, and the energy expenditure (i.e., swimming cost) by fish in the
turbulent flow are estimated at 15 monitoring spots. These spots are categorized into two groups: spots in and around the
fish nest are in ¡®Group 1¡¯, and spots away from the fish nest are in ¡®Group 2¡¯. The energy expenditure by fish in Group 1 is
estimated as significantly small, which indicates the fish nests contribute to create a preferable fish habitat in the canal.
File Size : 783,686 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Hydro-environment
Date Published : 13/08/2015
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