Pantai Morib
Sea Defences
Sea Wall
Sea walls aim to protect coast lines by sheilding waves wit concrete, granite, steel or stone. Some sea walls are curved but in picture it is a flat sea wall. The sea wall is effective to stop cliffs from eroding and it prevents floods and also stops long shore drifts. They also have a long life span meaning that it would still be as effective in the long run. Vertical sea walls are design to deflect wave enegy away from the coast.
Sea walls can also be damaged easily from destructive waves and it is expensive to repair them. High waves can easily go over sea walls, they create a strong back wash which erodes the wall underneath. Sea walls are also really expensive to build and it is really hard to maintain.
The Pantai Morib sea wall has been quite damaged and it is not as effective as it was. This sea wall is mostly made by concrete and partialy granite, hence the sea wall is easily eroded.
Concrete Reinforced Revetment
Revetments are the cheaper versions of a sea wall, it is a slanted version of a sea wall as you can see in the photo below. They can be made out of wood, concrete or rocks. Revetments stops cliff erosion from breaking the energy of the wave. This sea defence is expensive to build but cheap to maintain.
Concrete Revetments have limited lifespans, they are also not effective during heavy storms and they also create a strong backwash from the slope. The concrete blocks on the revetment must be maintained properly, if one block is damaged, loose or missing it will lead to the dislodge of other concrete blacks making the revetment dissemble.