What role did underground water flow play in the Kemensah Heights landslide?

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Underground Water Flow Identified as Primary Cause of Kemensah Heights Landslide

The landslide that impacted Jalan Kemensah Heights is believed to have been triggered by the movement of underground water following a significant downpour. This subterranean water flow is understood to have destabilised the soil structure, leading to the eventual slide. The movement of this water also contributed to blocking the natural course of the river at the base of the hill.
Soil Structure Destabilisation

The primary mechanism behind the Kemensah Heights landslide is attributed to the disruptive force of underground water. A recent heavy rainfall event is thought to have mobilised this water, causing it to flow beneath the surface. This subterranean water movement is directly implicated in weakening the integrity of the soil structure, making it susceptible to failure.
River Flow Obstruction

In addition to destabilising the soil, the underground water flow also created a secondary issue by impeding the natural course of the river situated at the foot of the hill. This blockage likely exacerbated the conditions on the slope, potentially increasing pressure or saturation levels in the affected area. The confluence of these factors contributed to the overall instability that resulted in the landslide.
Evacuation and Repair Efforts

In response to the incident, the Selangor Fire and Rescue Department, in conjunction with the police and the Ampang Jaya Municipal Council, initiated evacuation procedures for affected residents. The landslide involved 19 double-storey terrace houses and impacted 28 families, though fortunately, no injuries were reported. Responsibility for carrying out the necessary slope repair works has been assigned to the relevant authorities.

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What role did underground water flow play in the Kemensah Heights landslide?

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