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

Mooring Test• Mooring line to water depth ratio

• Mooring blocks relative orientation

• Mooring grid test

Mooring line to water depth ratio

Variable• n = 2• n = 3• n = 4

Mooring line to water depth ratio

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

Mooring blocks relative orientation

Mooring blocks relative orientation

Mooring blocks relative orientation

Mooring blocks relative orientation

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

Typical cage mooring

12 m

15 – 20 m

Mooring trial - scale model

1.2 m

1.5 – 2.0 m

0.275 m

Mooring trial - scale model

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

Mooring Set-up• Independent

block moorings

• Interlinked block moorings

• Sub-surface mooring grid

Mooring grid test

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

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

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.