Assertion: submerged breakwater | /r/HasProperty | constructed for beach protection
Facets:
value: often
type: TEMPORAL
Source sentences:
text: They are often constructed for beach protection or to restore eroded beaches, being applied as a preliminary defense system to protect the principal coastal structures, redistribute sediment transport patterns, create desirable beach features, create calmer zones in harbors, prevent siltation or alter the sediment deposition area in port access ways and navigation channel entrances.