Mitimele kogi ne na kudu maso yammacin babban yankin Equatorial Guinea. Ya zama wani ɓangare na Muni Estuary tare da Kogin Mitong, Kogin Mandyani, Kogin Congue, Kogin Utamboni da Kogin Mven. Kogin ya zama Kogin Utamboni tare da iyaka da Gabon. Hughes, R. H.; Hughes, J. S. (1992). A Directory of African Wetlands. IUCN. p. 501. ISBN 978-2-88032-949-5. Retrieved 30 March 2012. Sundiata, I. K. (1990). Equatorial Guinea: colonialism, state terror, and the search for stability. Westview Press. p. 6. ISBN 978-0-8133-0429-8. Retrieved 30 March 2012.