Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Built Environment (hierarchy name)
4. Single Built Works (hierarchy name)
5. single built works (built environment)
6. [single built works by specific type]
7. [single built works by function]
8. hydraulic structures
9. [hydraulic structures by function]
10. flood protection works

Narrower term/s

• peat dikes
• polder dikes
• defensive dikes [NP]

Anotations

Scope note:

Embankments built along a river or sea and set at some distance from it to control or retain flood waters. For embankments built only to prevent flooding of low-lying land use "levees."