<Li> 1,992 km (1,238 mi)--Tapajós, Brazil </Li> <Li> 1,979 km (1,230 mi)--Xingu, Brazil </Li> <Li> 1,900 km (1,200 mi)--Ucayali River, Peru </Li> <Li> 1,749 km (1,087 mi)--Guaporé, Brazil / Bolivia (tributary of Madeira) </Li>

Where is the deepest part of the amazon river