Kogin Anambra
Kogin Anambra ( Igbo : Ɔmambala ) yana gudana  zuwa cikin kogin Neja kuma na nan a Anambra, Nigeria. Kogin ya kasance mafi mahimmancin wajen shayar da Kogin Niger da ruwa wanda ke birnin Lokoja. Ruwa daga kogin Ɔmambala na zuba acikin Tekun Atlantika ta magunan ruwa daban-daban da ya kwashe kilimitoci  a yankin Neja Delta.

Yankin Kogin Anambra da Al'adu 
Omambala shine sunan tsohuwar abin bauta wanda koginta ke gudana daga ƙarƙashin ƙasa na Uzo-uwa-ani zuwa Aguleri, Anam, Nsugbe da Onicha axis, inda ya hade da kogin Nkisi da Niger-kwora/Mgbakili a tafiyarsu zuwa Tekun Atlantika, dangane da labarin ƴan asalin garin. Haka kuma kogin Ezu da Ezichi suna kwarara cikin kogin Anambra a Agbanabo da Oda.

Akwai tatsuniyoyi da asirai da dama da ke kewaye da Omambala wanda ya haifar da fassarori daban-daban daga ƙabilu da al'ummai da dama, don haka Turawan bincike na farko suka furta kalmar Omambala a matsayin Anambra.

Kafin a kafa jihohi, ana amfani da kalmar Omambala ta matsayin sunan yankin wanda ya mamaye yankin Anambra ta yau, sassan Kogi, Enugu da kuma Ebonyi na ’yan asalin yankin. A halin yanzu, ’yan asalin Aguleri, Anam, Nsugbe, Umueri, Anaku, Nteje, Umunya, Nando, Igbariam, Nkwelle-Ezunanka, Nzam, Awkuzu, Ogidi, Ogbunike, dangin Ayamelum, da sauran su, suna yin iƙirari cewa sune 'yan asalin Omambala na gado. 

Mutanen Omambala suna da yaruka daban-daban, imani, al'adu da dabi'u na ƙabilanci tare da tsarin imani da yawa na sufanci da esoteric waɗanda ke ba da ƙima mai ƙarfi akan ruhaniya akan jari-hujja, kuma ana riƙe su tare da madawwama ta al'ada, harshe, al'adar addini da Kogin Omambala. Wannan ya faru ne saboda ƙaƙƙarfan alaƙa da haɗin kai da ke tsakanin su da ilimin sararin samaniya da yanayin halittu.

Tasirin zamantakewa da tattalin arziki da siyasa da amfanin yankin Omambala ya kai sassan Edo, Delta, Imo, Rivers, Abia, Taraba, Benue, Niger, Nasarawa, Plateau, Akwa-Ibom & Cross-Rivers. Najeriya har zuwa Nijar, Chadi, Kamaru, Mali, Jamhuriyar Afirka ta Tsakiya, da dai sauransu.

Manazarta 

Jihar Anambra
Kogunan Najeriya