4. Coastal Erosion and Protection Measures Including Case Studies
105
LBXB<0.4to0.5, Salient
LB.XB = 0.5 to 0.67, Salient
LB'XB < 1.0, No tombolo (single breakwater)
LB'XB <1.5, Well-developed salient
LB/XB<0.8 to 1.5, Subdued salient
LB.XB > 0.67 to 1.0, Tombolo (shallow water)
LBXB >2.5, Periodic tombolo
LB.XB > 1.5, Tombolo (multiple breakwaters)
LB'XB > 1.5 to 2.0, Tombolo
Fig. 4.5(c) Formations of salient and tombolo based on the environmental
parameters.
Submerged offshore breakwaters function as dissipaters reducing the
incident wave energy and the waves undergo diffraction. If planned for, it
can also potentially bring down overtopping and run-up on Coastal structures. The submerged structure facilitâtes prématuré breaking for certain
wave characteristics. A comparison of Coastal process in the presence and
absence of submerged breakwaters is illustrated in Fig. 4.5(d).
fig. 4.5(d) Coastal processes in the absence and presence of submerged
breakwaters.
105
LBXB<0.4to0.5, Salient
LB.XB = 0.5 to 0.67, Salient
LB'XB < 1.0, No tombolo (single breakwater)
LB'XB <1.5, Well-developed salient
LB/XB<0.8 to 1.5, Subdued salient
LB.XB > 0.67 to 1.0, Tombolo (shallow water)
LBXB >2.5, Periodic tombolo
LB.XB > 1.5, Tombolo (multiple breakwaters)
LB'XB > 1.5 to 2.0, Tombolo
Fig. 4.5(c) Formations of salient and tombolo based on the environmental
parameters.
Submerged offshore breakwaters function as dissipaters reducing the
incident wave energy and the waves undergo diffraction. If planned for, it
can also potentially bring down overtopping and run-up on Coastal structures. The submerged structure facilitâtes prématuré breaking for certain
wave characteristics. A comparison of Coastal process in the presence and
absence of submerged breakwaters is illustrated in Fig. 4.5(d).
fig. 4.5(d) Coastal processes in the absence and presence of submerged
breakwaters.