Report No. : GEO Report No. 173

Report Title : Detailed Study of the Coastal Landslide at Shek Kok Tsui, Lamma Island (2005), 86 p.

Author : Maunsell Geotechnical Services Limited


This report presents the findings of an investigation into the history of instability of a massive coastal landslide at Shek Kok Tsui, Lamma Island. The estimated total volume of detached material from several episodes of instability is about 25,000 m3. Debris derived from the landslide complex, much of which has been deposited in the sea, has a travel angle of approximately 25°.

The key objectives of the detailed study were to document the facts about the landslide, present relevant background information and establish the probable mechanisms and causes of the landslide. The scope of the study comprised desk study, site reconnaissance, limited ground investigation and detailed mapping. Recommendations for follow-up actions are reported separately.

The report was prepared as part of the 2003/2004 Landslide Investigation Consultancy for landslides occurring in Kowloon and the New Territories in 2003 and 2004, for the Geotechnical Engineering Office, Civil Engineering Department, under Agreement No. CE 94/2002 (GE).

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