Groin is one type of security structure which is designed to shore along the coast to build a stable beach. Usually groin constructed with natural stone materials, tribar, dolos and so on. Groin operationally defined by several conditions (CERC, SPM Vol 1, 1984), namely: Groin only be used to transport longshore conditions. Adjustment groin circumstances surrounding beaches will depend on the distance and direction of longshore transport. The results accumulated by longshore transport of beach groin will change the profile of the beach. Waves that forged groin will sometimes be reflected into the offshore along the groin. The percentage of longshore transport through the groin will depend on the dimensions groin, groin filler materials, water level and wave climate.
The advantage of using the groin:
a) Groin effectively restrain the transport of sediment parallel to shore
b) The data indicates the efficiency of the groin in the physical environment
c) Groin can be built by the placement of equipment on the ground
d) does not change Groin surf zone. High waves along the coast after groin construction does not change, so as not to interfere with surfing and swimming at the beach
e) Groin can be planned using a variety of materials, such as rubble-mound, steel sheet pile, concrete and wood
f) The set of dimensions and permeabilitasnya, can be designed to resist groin parallel transport or allow the release of beach sand into the sea (sand by passing)
Weaknesses in the groin are:
a) Not effective in preventing the transport of sediment out to sea (offshore transport)
b) Groin may cause gusuran beach dihilirnya (down drift)
c) Lack of effective use in the muddy shore
The advantage of using the groin:
a) Groin effectively restrain the transport of sediment parallel to shore
b) The data indicates the efficiency of the groin in the physical environment
c) Groin can be built by the placement of equipment on the ground
d) does not change Groin surf zone. High waves along the coast after groin construction does not change, so as not to interfere with surfing and swimming at the beach
e) Groin can be planned using a variety of materials, such as rubble-mound, steel sheet pile, concrete and wood
f) The set of dimensions and permeabilitasnya, can be designed to resist groin parallel transport or allow the release of beach sand into the sea (sand by passing)
Weaknesses in the groin are:
a) Not effective in preventing the transport of sediment out to sea (offshore transport)
b) Groin may cause gusuran beach dihilirnya (down drift)
c) Lack of effective use in the muddy shore
No comments:
Post a Comment