Its lower reaches are joined by only one major tributary, the Salado; whereas the upper course has three major tributaries, including the Tiete [tee-et-TAY] and Panema rivers. That upper course was once marked by the massive Guaira [GWY-aa-ra] Falls, which no longer exist because of the Itaipu damn complex. Its delta forms between Santa Fe and Rosario, well after the Paraguay River joins it. FTP, 
Its lower reaches are joined by only one major tributary, the Salado; whereas the upper course has three major tributaries, including the Tiete [tee-et-TAY] and Panema rivers. That upper course was once marked by the massive Guaira [GWY-aa-ra] Falls, which no longer exist because of the Itaipu damn complex. Its delta forms between Santa Fe and Rosario, well after the Paraguay River joins it. FTP, name this second longest river in South America.
Its lower reaches are joined by only one major tributary, the Salado; whereas the upper course has three major tributaries, including the Tiete [tee-et-TAY] and Panema rivers.
{Parana} River or Rio {Parana}