Kogin Anum kogin Ghana ne. Wani ɓangare na yankin tsakanin kogunan Anum da Pra sun samar da gandun daji na Pra Anum. A cikin 1977 an ba da rahoton cewa ana samun sabbin rangwame a Kogin Anum, da kogunan Lower Offin, Pra, Tano, da Ankobra don dalilai masu lalata. Amanor, Kojo (1999). Global Restructuring and Land Rights in Ghana: Forest Food Chains, Timber, and Rural Livelihoods. Nordic Africa Institute. p. 123. ISBN 978-91-7106-437-0. Ghana: An Official Handbook. Ghana Information Services. 1977. p. 195.