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Impact of trawling speed on vertical opening of trawl net by modelling method
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This study was conducted to find out the relations between trawling speed and vertical opening of trawl net. The study uses a trawl model to perform a test in a flume tank at various trawling speeds, from 0.46 m/s to 1.08 m/s, this is equivalent from1.5 knots to 3.5 knots in the field for full-scale net. The results show that the vertical opening of the net mouth decreases as the trawling speed increases, the vertical opening was reduced by more than 32% as the speed increased from 1.5 knots to 3.5 knots. The regression results show that there is an approximate relationship between trawling speed and vertical opening with a logarithmic function (correlation coefficient R² = 0.9663). The results of this study are entirely consistent with previous field studies conducted in the world.
Key words: Trawl net, vertical opening, trawling speed
Nha Trang University
Title: Impact of trawling speed on vertical opening of trawl net by modelling method
Description:
This study was conducted to find out the relations between trawling speed and vertical opening of trawl net.
The study uses a trawl model to perform a test in a flume tank at various trawling speeds, from 0.
46 m/s to 1.
08 m/s, this is equivalent from1.
5 knots to 3.
5 knots in the field for full-scale net.
The results show that the vertical opening of the net mouth decreases as the trawling speed increases, the vertical opening was reduced by more than 32% as the speed increased from 1.
5 knots to 3.
5 knots.
The regression results show that there is an approximate relationship between trawling speed and vertical opening with a logarithmic function (correlation coefficient R² = 0.
9663).
The results of this study are entirely consistent with previous field studies conducted in the world.
Key words: Trawl net, vertical opening, trawling speed.
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