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Malaysia Water Research Journal<br />
moving farther seaward from land.<br />
a) Beach profiles at unprotected shores after simulations completed (control)<br />
b) Beach profile changes with NEXC Block protection<br />
c) Beach profiles with NEXC Block plus scour protection<br />
Figure 3. Analysis of erosion-accretion after simulations completed<br />
The simulations are also expanded by introducing scour protection installed<br />
at the toe structure to prevent structural failure. From Figure 3c, the analysis<br />
showed that sufficient toe protection had increased the stability of NEXC Block<br />
installation. Scour at toe structure can be minimized and naturally transferred at<br />
the bottom of the scour protector units. Scour protection units can be installed<br />
further seaward beyond breaking zone hence minimizing the impact of scour<br />
problem. However an increase in overtopping is expected with this type of<br />
installation due to the increase of height breaker.<br />
Hollow slanting cone shape design at NEXC Block is the main feature that<br />
allows sea water to penetrate through structure during flood and ebb flows.<br />
Institut Penyelidikan Hidraulik Kebangsaan Malaysia (NAHRIM)<br />
35<br />
National Hydraulic Institute of Malaysia (NAHRIM)
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