by Guest / 10.23.2018 / 43
Junction of the rivers: N50°17', E101°57' Erdenebulgan soum of Khubsgul province
Distance: 620 km northeast Ulaanbaatar, 290 km north east Undur Khaan town
The basin of the Onon and Balj rivers has similar landscape to the Siberian taiga and Khentii range and it is rich in many rare species of trees, animals, birds, fish as well as many fresh water lakes and rivers. Daguur larch and Krilow pine trees grow only in this basin. This is home to many rare animals and birds including moose, deer, roe deer, boars, wolverines, lynxes, squirrels, eagles, white-tailed eagles, black stocks, whooper swans and white-naped cranes. The Onon River’s source is at 1950 m of the Ikh Khentii Range and runs for 445 km until the Mongolian/Russian border. Then the river runs for 363 km until the Shilka River. The total drainage basin of the river is 94040 sq km, but only 40220 sq km is in Mongolia.
On average the river is 80-160 m and 3-5 m deep. Tributaries are 10-15 m wide, but the width of the river can vary depending on width of the river valley. It freezes in November and is covered by 1.2-1.5 m thick ice for 150-170 days. Many rivers flow into the Onon River: from these rivers the biggest rivers are the Eg, Barkh, Khurkh, Bayan, Shuus, Balj and Agats rivers. The Onon River is rich in many rare fish including Amur sturgeon, carp, lenok, Amur ide, false asp, white grayling and amur pike. The Onon River valley has some important mineral water springs like the Onon hot spa and Gurvan nuur spa. The latter spa has been used for health benefits by the state. There are also many historical sites in the Onon River valley such as Rashaan Khad, Uglugchiin Kherem, and many other sites dated back to Chingis Khaan.
The Onon and Balj River basin has been protected as a national Park since 2000. Onon River valley such as memorials of Rashaan Khad, Uglugchiin Kherem, and many other sites dated back to Chinnggis Khaan. Basin of Onon River and Balj River has been protected as a national Park since 2000.