Assertion: estuary's water | /r/AtLocation | upper layer
Facets:
value: constantly
type: TEMPORAL
value: along the length of the estuary
type: LOCATION
Source sentences:
text: Because water is constantly added to the upper layer along the length of the estuary, the interface does not come up to the surface but remains submerged even at the mouth, where its location is hard to determine from the salinity profile.