Depends on the river. Large rivers can be miles wide at the mouth.
a river mouth
widest river in britain?
Yangtze River
Delta.
no, its the Yangtze river
New Orleans, LA is located at the mouth of the Mississippi river.
c. near the mouth of the river
Shanghai, China is nearest to the mouth of the Yangtze river.
The mouth of the Amazon River is located at the Atlantic Ocean in Brazil, specifically near the city of Belém in the state of Pará. It forms an extensive estuary, with the river splitting into multiple channels as it flows into the ocean. The Amazon River's mouth is one of the largest river mouths in the world, covering an area of about 150 miles (240 kilometers) wide.
Its source is in Spain, its mouth is in Portugal, near Lisbon.
estuary
An estuary.