A PLAN FOR IMPROVED AND SUSTAINABLE CAGE AQUACULTURE IN LAKE VOLTA
Improving cage mooring for aquaculture parks
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Transcript of Improving cage mooring for aquaculture parks
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Planning and management of aquaculture parks for sustainable development of cage farms in the
Philippines
Regino R. Regpala
www.aqua-park.asia
MOORING DESIGN FOR EXPOSED AREAS
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Mooring Test• Mooring line to water depth ratio
• Mooring blocks relative orientation
• Mooring grid test
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Mooring line to water depth ratio
Variable• n = 2• n = 3• n = 4
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Mooring line to water depth ratio
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Mooring line to water depth ratio
Length of mooring line Drag (kg)
WD X 229.3 ± 0.577
WD X 329.7± 0.577
WD X 431.7± 0.577
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Mooring blocks relative orientation
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Mooring blocks relative orientation
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Mooring blocks relative orientation
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Mooring blocks relative orientation
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Mooring blocks relative orientation
Orientation of mooring blocks
Drag (kg)
side by side 63.7 ± 1.5
next to one 53.0± 1
next to one (1m apart) 56.3± 1.5
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Typical cage mooring
12 m
15 – 20 m
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Mooring trial - scale model
1.2 m
1.5 – 2.0 m
0.275 m
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Mooring trial - scale model
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Mooring trial - scale model
1.2 m
1.5 – 2.0 m
Measure kg of pull needed to move the mooring blocks
Mud on bottom of tank 0.275 m
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Mooring Set-up• Independent
block moorings
• Interlinked block moorings
• Sub-surface mooring grid
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Mooring grid test
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Mooring grid test
Grid Set-up Drag (kg)
independent block 97.3± 2.52
interlinked block 246.0 ± 1.73
interlinked mooring grid 244.0± 1.73
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Conclusion and Recommendations
• Longer mooring leg and sideways geometric orientation of mooring blocks proved to have more significant grip.
2m
concrete blocks
pulley weighing scale
pullPE rope
ᵩ
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Conclusion and Recommendations
• Interlinked mooring blocks could be used in shallow area.
• Sub-surface mooring grid may be used in areas where diving is impossible.
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