Sea DEFENCE 1 : concrete reinforced revetment
This sea wall defense has two parts to it, they are rip raps (individual rocks) and the sloping wall (the wall with a curve). I have rated this sea defence as 6/10 for effectiveness as it is actually preventing erosion from the protected recreational areas despite it's messy appearance.
Firstly. what are rip raps? The rip raps are made from granite rocks and they are made as individual rocks which are placed by the side of each other and on top of each other. The purpose of these rip raps is to protect the shoreline from erosion. The reason for rip raps is to absorb and then deflect the waves energy. The gaps between the rip raps is to trap and slow the flow of water to help minimise the ability of erosion from the waves. However, over time these rip raps will be eroded away and require the management to constantly replace the rip raps which is troublesome. This sea wall doesn't look attractive as the rocks are starting to erode and some of the have even trapped some trash which is a disgrace.
The second part of the defence is the sloping wall. This wall has curves all around it and gaps within them and the purpose is to help slow down the process of erosion. The holes within the wall are designed to let some of the waves water seep through the holes to help minimise the impact of the energy of wave. This sea wall is pretty effective in helping to protect the shoreline. However cracks have started to form due to the constant impact and erosion from the waves. This requires the management to keep fixing it which can be expensive in a long term.
Firstly. what are rip raps? The rip raps are made from granite rocks and they are made as individual rocks which are placed by the side of each other and on top of each other. The purpose of these rip raps is to protect the shoreline from erosion. The reason for rip raps is to absorb and then deflect the waves energy. The gaps between the rip raps is to trap and slow the flow of water to help minimise the ability of erosion from the waves. However, over time these rip raps will be eroded away and require the management to constantly replace the rip raps which is troublesome. This sea wall doesn't look attractive as the rocks are starting to erode and some of the have even trapped some trash which is a disgrace.
The second part of the defence is the sloping wall. This wall has curves all around it and gaps within them and the purpose is to help slow down the process of erosion. The holes within the wall are designed to let some of the waves water seep through the holes to help minimise the impact of the energy of wave. This sea wall is pretty effective in helping to protect the shoreline. However cracks have started to form due to the constant impact and erosion from the waves. This requires the management to keep fixing it which can be expensive in a long term.
Sea DEFENCE 2: Sea wall
This is the second sea defence sketch that I have drawn. When we were at Pantai Morib, the tides were low and therefore we were able to take a good look at the sea defence. In my opinion, i have rated this sea defence to be be 4/10 for its appearance as it looks simple and yet effective. However, the down side of it is the obvious cracks on the concrete blocks that makes it looks messy and ugly. But overall, it is better than the first sea defence as the cracks that i have mentioned wouldn't be visible if the tide are high.Therefore the appearance wouldn't be affected as much as the concrete reinforced revetment. The purpose of the fences are to prevent children or people from falling into the sea, but the funny part is there are only a few of them. As for the 90 degree angle wall, its purpose is to stop waves entering the protected area. But the disadvantage of this is as the waves hit the wall, the energy of the waves would be stronger as it was forced to stop at the point where the wall is and this will cause the sediments to be pushed away in this area.
Lastly, as this is quite an old sea wall, the concrete blocks are starting to erode and eventually will causes the seawall to collapse. Therefore, regular maintenance is a required.
Lastly, as this is quite an old sea wall, the concrete blocks are starting to erode and eventually will causes the seawall to collapse. Therefore, regular maintenance is a required.