Hierarchy classification:

1. top of the aat hierarchies
2. Activities Facet
3. Functions (hierarchy name)
4. functions (activities)
5. [functions by general context]
6. maintenance
7. protection (maintenance function)

Anotations

Scope note:

Protection measures intended to eliminate and reduce the hazard and damage that could result from landslides, including implementing drainage systems, moving and terracing earth on hillsides, constructing retaining walls, maintaining plants and trees, and issuing bulletins to the public.