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Page 1: Improving cage mooring for aquaculture parks

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

Page 2: Improving cage mooring for aquaculture parks

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

Page 7: Improving cage mooring for aquaculture parks

Mooring blocks relative orientation

Page 8: Improving cage mooring for aquaculture parks

Mooring blocks relative orientation

Page 9: Improving cage mooring for aquaculture parks

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

Page 14: Improving cage mooring for aquaculture parks

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

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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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