Kogunan Siberia: Ob

El Kogin Ob Babban kogi ne a yamma da Siberia, kuma shine wanda yake mafi girman bakin teku a duniya mai nisan mil 16 (kilomita 26) kudu maso yamma na Biysk a cikin Altai Krai ta hanyar haduwar kogunan Biya da Katún.

Dukkanin kogunan biyu sun samo asali ne daga tsaunukan Altay, balaguron Biya daga Lake Teletskoye, da Katun, mai nisan mil 80 (kilomita 130), daga fashewar kankara a kan Dutsen Byelukha.

Kogin ya kasu sama da hannu daya, musamman bayan ya shiga cikin babban harajin Irtysh wanda yake a zahiri ya fi Ob nesa daga asalinsa har zuwa ma'amalarsa.

Ruwa na ruwa na kwarin Ob ya kai tsawon tsawon mil 9.300 (15.000 kilomita). Mahimmanci yana cikin jigilar kaya musamman bayan kammala hanyar jirgin Trans-Siberian, tunda, duk da babban hanyar kudu-zuwa-arewa ta hanyar rafin Ob da kuma mafi yawan rafukan ta, faɗin shimfidar jirgin ruwan Ob da aka tsara (duka kai tsaye) hanyar gabas-yamma kuma.

Har zuwa farkon karni na 20, tashar jirgin ruwa a yamma da Kogin Tyumen na da mahimmanci, wanda ke kan Kogin Tyumen, wani harajin Tobol.


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