Assertion: flood's discharge | /r/CapableOf | exceed 1,000 ft3/s
Facets:
Source sentences:
text: The annual frequency that daily discharge exceeded 1,000 ft3/s on the Northeast Branch of the Anacostia River in Maryland increased from once or twice per year in the 1940s and 1950s to as much as six times per year in the 1990s.