Landslide Hazard and Risk Assessments

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Steve has undertaken both qualitative and quantatative landslide hazard and risk assessment in the UK, Hong Kong and the wider Asia Pacific Region.  Steve was co-author  of “Guidelines for Natural Terrain Hazard Studies” which formed the basis of landslide risk assessment in Hong Kong until 2016. Steve led the technical review and updating of these guidelines which forms the basis of the latest Hong Kong Government guidelines. 

Hazard and risk are as defined in AGS (2007).   

 Landslide hazard “a condition with the potential for causing an undesirable consequence” and in relation to landslides notes that “the description of landslide hazard should include the location, volume (or area), classification and velocity of the potential landslides and any resultant detached material, and the probability of their occurrence within a given period of time”.

Landslide Risk “A measure of the probability and severity of an adverse effect to health, property or the environment. Risk is often estimated by the product of probability of a phenomenon of a given magnitude times the consequences”

• Specialist Advisor, Two-year (2018-2020) Landslide Investigation Consultancy. Hong Kong Government Agreement CE28/2018. Client Fugro Hong Kong.
• Expert witness for a successful £2 million claim arising from landslide impact.
• Peer Review, Landslide Assessment Report, South Wales. Client ESP.
• Review of Peat Landslide Hazard and Risk Assessment for a Scottish Windfarm, Client Envireau Water UK
• Qualitative hazard assessment of gypsum subsidence, Client Envireau Water UK
• Landslide Hazard and Risk Assessment, Panteg, South Wales. ESP/Neath & Port Talbot Council.
• Evaluation of landslide hazard and risk. Various Sites throughout South Island, New Zealand. Opus International/NCTIR, Christchurch New Zealand.
• Initial evaluation of earthquake induced landslides in Nepal from satellite imagery. Client British Geological Survey.
• Evaluation of geohazards to the west coast railway main line UK, Client British Geological Survey.
• Review of potential improvements to the UK’s landslide hazard and risk assessment methodology. Client British Geological Survey. 

Parry, S. (2016) Landslide hazard assessments: problems and limitations. Examples from Hong Kong. In Developments in Engineering Geology (2016) Editors: M. Eggers, J. S. Griffiths, S. Parry and M. G. Culshaw Engineering Geology Special Publication no. 27, Geological Society of London.

Parry S., Millis S. W., Clahan K. B. & Krug K (2010). The importance of reading the landscape: The use of engineering geomorphology in regional landslide hazard assessments. Proceedings of the International Association of Engineering Geology Conference. Auckland, 2010. 

Millis, S. W. Clahan, K. B. and Parry S. (2010). Regional Scale Natural Terrain Landside Risk assessments: An Example from West Lantau, Hong Kong. The 17th Southeast Asian Geotechnical Conference. 

Parry, S. & Ng, K. C. (2010) The Assessment of Landslide Risk from Natural Slopes in Hong Kong: An Engineering Geological Perspective. Quarterly Journal of Engineering Geology and Hydrogeology.  Vol 43 pp307-320.