ABSTRACT
SLOPE FAILURE Potential threat of landslides depends on ground slope, rock type and inclinations of rock structures; limit angle for stable slopes may be around 10 in clays, 30-40 in well fractured rocks, and up to vertical in strong, massive rocks (section 37). Local data (with water conditions) allows hazard zoning. Trenches are useful to assess shallow slide geometry, and are the most reliable method for recognizing solifluc - tion shears – they were not used prior to the Carsington Dam failure (section 16). Monitor potentially active slides through a wet season.
