<Ul> <Li> Ka River </Li> <Li> Zamfara River </Li> <Li> Gaminda River </Li> <Li> Rima River <Ul> <Li> Goulbi de Maradi River </Li> <Li> Gagere River </Li> <Li> Bunsuru River </Li> </Ul> </Li> </Ul> <Li> Rima River <Ul> <Li> Goulbi de Maradi River </Li> <Li> Gagere River </Li> <Li> Bunsuru River </Li> </Ul> </Li> <Ul> <Li> Goulbi de Maradi River </Li> <Li> Gagere River </Li> <Li> Bunsuru River </Li> </Ul> <Li> Goulbi de Maradi River </Li>

River basins in nigeria and what they do