Report No. : GEO Report No. 363

Report Title : Detailed Study of the 29 August 2018 Landslides on the Natural Hillside above Fan Kam Road, Pat Heung (2022), 86 p.

Author : AECOM Asia Company Limited

Abstract

This report presents the findings of a detailed study of landslide incidents (Incident Nos. 2018/08/2228 and 2018/08/2229) that occurred on a natural hillside above Fan Kam Road, Pat Heung during an intense rainstorm on 29 August 2018. The incidents primarily comprised three landslide clusters with total source volume ranging from 200 m³ to 800 m³. While the landslides initiated as open hillslope failures from multiple source areas within the landslide clusters, a number of which with debris converged into drainage lines and turned into channelised debris flows descending towards Fan Kam Road. The detached materials travelled a distance of about 300 m down the hillside, mostly coming to rest before reaching Fan Kam Road, but outwash debris inundated both lanes of the road resulting in temporary road closure among other consequences. The incidents were widely reported by the media. No casualties were reported.

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