Abstract
Landslide monitoring and management is a challenging task in the remote, rugged and sparsely-populated Ok Tedi Mine area of Papua New Guinea (PNG). Ground elevations are 500–2200 m above sea level. Annual rainfall is 8000–13000 mm. Earthquakes may exceed magnitude 7 on the Richter scale; but are commonly 3–6. Avalanche debris from an ancient landslide dating back to 6700 BC underlies much of the existing terrain. Recent landslides often involve reactivation of old debris materials. The stability situation is compounded by local inhabitants’ deforestation of rugged hillsides to establish gardens. Limitations of various monitoring systems are discussed and case studies presented.
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