Popangidwa ndi pophatikizana awiri Altai mitsinje - ndi Biya Katun mtsinje ob Ndipotu akupitiriza Katun. Pa confluence a malo awa anapanga mokwanira amphamvu kwambiri chipwirikiti otaya. Ndipo aliyense mtsinje - mtundu. Biya ali woyera kapena zonyansa-imvi mtundu, ndi Katun - wobiriwira. Ophatikizana mu mtsinje umodzi wa madzi ndi wothira kwa nthawi yaitali, chifukwa mu milozo akuda kutsitsi madzi. Makamaka bwino zodabwitsazi zimawonedwa m'chilimwe ndi yophukira. Kugwera Kara nyanja ob ndipamene Bay lalikulu ndi kutalika za 800 makilomita wotchedwa ob mlomo.
Pamodzi ndi tributary ake ndi Irtysh mtsinje ob mu malo oyamba yaitali mu Russia (5410 Km.) Ndipo wachiwiri - mu Asia. M'dera la beseni ake - pafupifupi 3 miliyoni sq M.. Km. Malinga ndi mmene khalidwe la maukonde mtsinje, kudyetsa zinthu anapanga madzi mode mtsinje ob akhoza kugawidwa mu magawo atatu lalikulu chapamwamba (kuchokera ku gwero pakamwa pa mtsinje Tom), sing'anga (pakamwa Irtysh) ndi kutsikira (mpaka ob milomo). Kupeza madzi a mtsinje ndi makamaka chifukwa kusungunuka chisanu, ndi otaya chochuluka kwa nthawi ya masika ndi chilimwe. Mu malire chapamwamba a chigumula ndi zambiri oyambirira April, pafupifupi - pakati pa mwezi, ndi pansi - kumapeto April-oyambirira May. Kulera madzi kumayamba amaundana-mmwamba. Ndi kutsegula kwa mtsinje angakhale yochepa ankakhala kwambiri madzi mlingo limatuluka chifukwa sachedwa chifukwa ayezi. Pankhaniyi, mwina kusintha otaya malangizo ena a ob makhwawa. Mu malire chapamwamba chigumula zikhoza mpaka July, chilimwe nthawi otsika madzi amakhala ndi mavuto ena ndi September-October mvula ndi madzi osefukira. The mavuto a chigumula ku malire pakati ndi kutsikira apitirize mpaka amaundana-mmwamba. Obi yambiri (Irtysh Charysh, Anouilh, Aley, Chumysh, Berd, Chulym, Tom, etc ..) Ndipo makhwawa yaing'ono.
Pa chiyambi cha dzina la thupi ili la madzi Mabaibulo angapo. Chotero, chilankhulidwe cha mawu Komi "ob" amatanthauza "matalala" kapena "snowdrift". Baibulo lina limanena kuti dzina la mtsinje panali Persian "pa" ( "madzi"). Palinso buku limene maziko mayina a mawu amayenera Russian "onse" chifukwa gwero la ob Mtsinje aumbike mwa pophatikizana wa matupi awiri a madzi. Aliyense chiphunzitso ali ndi ufulu kulibe.
Ob Mtsinje n'kofunika kuti lonse la dera West Siberia. Izo ntchito monga njira zachilengedwe kayendedwe, makamaka chilimwe yobereka mafuta ndi chakudya m'madera kumpoto zotheka kokha mwa mtsinje. Kum'mwera pali Novosibirsk mosungiramo (imatchedwanso Nyanja ob) anapanga anamumanga 1950-1961 gg. Novosibirsk HPP damu. Mu ob madzi amakhala pafupi makumi asanu mitundu yosiyanasiyana ndi subspecies nsomba, pafupifupi theka la zimene ziri mitundu chandamale (makamaka bwino mauna - Pike njoka yam'madzi, seabream, nsomba, ide, roach, etc.). Monga mwachizolowezi mu mtsinje Nsombazi, Nsombazi, nsomba woyera, whitefish, ndi ena. Ob mtsinje, makamaka malire ake chapamwamba, ali kale ntchito ngati malo ampumulo. Pali pogwiritsa ambiri komanso malo alendo (makamaka ku dera la Novosibirsk madzi posungira), kudziŵika kokha mu Russia komanso kunja.