The Siyom River is a right tributary of the

Brahmaputra The Brahmaputra is a trans-boundary river which flows through Tibet, northeast India, and Bangladesh. It is also known as the Yarlung Tsangpo in Tibetan, the Siang/Dihang River in Arunachali, Luit in Assamese, and Jamuna River in Bangla. I ...

(Dihang or Siang) in the Indian state of

Arunachal Pradesh Arunachal Pradesh (, ) is a state in Northeastern India. It was formed from the erstwhile North-East Frontier Agency (NEFA) region, and became a state on 20 February 1987. It borders the states of Assam and Nagaland to the south. It shares ...

. The Siyom rises on the south of the main ridge of the

Assam Himalaya Assam Himalaya is a traditional designation for the portion of the Himalaya range between the eastern border of Bhutan, on the west, and the Great Bend of the Tsangpo River, on the east. The highest peak of this range is Namcha Barwa. Other hi ...

not far from the border with Tibet. The Siyom initially flows in a southerly direction, later in an easterly and southerly direction through the

West Siang District West Siang (Pron:/ˈsjæŋ or ˈsɪæŋ/) is an administrative district in the state of Arunachal Pradesh in India. History In 1989, territory was given from West Siang to the East Siang district. Since 1999, this territory has been in the new ...

. The Saje River is the most prominent of its several tributaries. The Mouling National Park is located on the east bank of the river. The river passes the district capital Aalo and finally flows into the Brahmaputra 50 km above

Pasighat Pasighat is the headquarters of East Siang district in the Indian state of Arunachal Pradesh. Situated at the eastern foothills of the Himalayas at above mean sea level, Pasighat is Arunachal's oldest town. The Government of India included Pa ...

. The Siyom has a length of about 170 km. The catchment area of the Siyom borders in the east, north and northwest on that of the

Yarlung Tsangpo The Yarlung Tsangpo, also called Yarlung Zangbo () is the upper stream of the Brahmaputra River located in the Tibet Autonomous Region, China. It is the longest river of Tibet and the fifth longest in China. The upper section is also called D ...

and in the southwest on that of the Subansiri River.

References

{{coord, 28.2351, 94.9993, format=dms, type:river_region:IN, display=title Rivers of India Rivers of Arunachal Pradesh Tributaries of the Brahmaputra River