What caused existing sandbags to fail against seawater?

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Increased Wave Heights Led to Sandbag Failure

Existing sandbag barriers failed to withstand seawater pressure due to an unusual increase in wave heights exceeding two feet last year. This heightened wave activity pushed the sandbags back when seawater levels rose above their normal thresholds.
Unusual Increase in Wave Height

The primary cause of the sandbag failure was a significant and uncharacteristic rise in wave heights observed throughout the past year. This increase, documented as being more than two feet higher than usual, surpassed the protective capacity of the existing sandbag installations.
Inability to Withstand Seawater Pressure

When seawater levels surged beyond normal parameters, the increased wave height exerted considerable pressure. This pressure proved too great for the current sandbag barriers, causing them to be pushed back and rendering them ineffective in preventing the ingress of seawater and mitigating erosion.
Context of Erosion Hotspots

The affected areas, specifically erosion hotspots in Batu Feringghi and Tanjung Bungah along a 3km stretch, have experienced this failure. These locations have been subject to ongoing erosion issues, and the recent surge in wave activity exacerbated the problem by overwhelming the existing protective measures.

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What caused existing sandbags to fail against seawater?

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