Assertion: delta's sediment | /r/HasProperty | 1.45×108 t
Facets:
value: from 1960
type: TEMPORAL
Source sentences:
text: The average sediment trapped by Sanmenxia Reservoir was 1.45×108 t from 1960 to 2007, and the average sediment retention of Xiaolangdi Reservoir was 2.398×108 t from 1997 to 2007.