THE RIVER SYSTEM OF ARUNACHAL PRADESH

Subansiri River

Subansiri River

  THE RIVER SYSTEM OF ARUNACHAL PRADESH

It may not be wrong to speculate that, but for the existence of Punjab in India, Bibhabasu das Shastri, the then Director of Research in the Government of Arunachal Pradesh, who was credited with giving the name “Arunachal Pradesh” to the then NEFA, in 1972, would have named it Punjab, since the five major rivers of this state, namely KAMENG, SUBANSIRI, SIANG, TIRAP and LOHIT, have been associated with the region from the very early times. Anyway, a speculation apart, Arunachal Pradesh is drained by innumerable rivers and a number of streams that drain the area almost throughout the year.

Starting from the west, in the Kameng district the first noteworthy river is the Nyamjang Chu, also called Dargong, drawing the waters of Mela ridge.  Then, there is the river Namka Chu, which assumes the name of Tawang Chu. The Kameng river starts at the Kameng  range at a height of 3000 mts, which is fed by the Dirang river, which flows through the Se La Pass. Other important rivers of the district are the Bhorelli, the Bichom and the Tengapani rivers. The long and narrow valley at the foot of Bomdila range is intersected by many streams, all of which are not perennial. The important river is the Daphla Kho, which flows into the basin of the largest river of Kameng, the Bhorelli. From the south-west direction, the Rupa river runs through the Sherdukpen Hills and joins the Kameng river. The rivers of the eastern Kameng hills flow in the south-westernly direction and the rivers in the western flow in the south easternly direction.

Kameng River

Kameng River

The main rivers of the Subansiri district are the Subansiri, Kamla, khru, Panior, Par and Dikrang. The life-line of the river system of the district is Subansiri which makes its way across the entire length of the territory flowing from north-west to south-east, also marking approximately the eastern boundary of the district. The headwater of the river in Tibet is formed by Char Chu, Chayal Chu and Yume Chu rivers. The Kamla river forms an important part of the Subansiri drainage system. It immerges from the confluence of a number of amall rivers cascading down from the noth-western snowy heights of the district. It may not be wrong to say that the Kamla river is the Nile of the Apatani valley. The Khru river is a turbulent river and like the Kamla, cuts through precipitous gorges. River Dikrang is formed by Par, Norochi and Pachin rivers. 

 

Moving to the east, the main rivers in the Siang district are Siang and Siyom, flowing in a north-sough direction. The Siang, also called Dihang, is known as Tsangpo in its upper course in Tibet. The river, originating in Tibet, makes its way into the Indian territory east of Gelling. In Arunachal, the river covers a length of about 250 kms., and is fed by many tributaries of which Siyom, Yame and Yang Sang Chu are worth mention. The Siyom river rises from the Pari mountains in the Mechuka area and flowing east through the areas of the Membas, the Ramos, the Pailibos and the Bokars, merges with the Siang river near Pangin. Another river of the Distric worth note is Simen, which emargs from high hills of Basar, and flowing southwards merges with Brahmaputra.

In the Lohit district, the main rivers are the Lohit, the Dibang, the Kamlang and the Nao-Dihing. River Lohit is called Tellu by the Mishmis. It originates from the mountains across the north-east border, i.e. from China where it is called Zayul Chu. River Lohit has a course of about 190 kms. Through steep hills and valleys before it reaches the plains at Parsuram Kund. The Dibang is the main river of the western part of the district. Originating from the southern flank of Great Himalayan Ranges, it flows from north to south and finally meets river Lohit near Sadiya. This river is called a Talon by the Indus and changes its course very often in the foothill region, thereby making it almost impossible to bridge it. The plains towards the south of the district are drained by the Kamlang and the Nao-Dihing rivers. The main tributaries of the Nao-Dihing in the Lohit district are Dirak on the left bank and Tengapani on the right bank. The Kamlang rises from the Galo in Wakro and flows in an east-westernly direction to finally meet the Lohit river.

Most of the rivers in the Tirap district flow east to west. The major rivers of this area the Nao-Dihing, the Burhi-Dihing, the Tirap, the Namsang, the Namphuk and the Namphai. The Noa-Dihing flows east-west through the entire north-eastern and northern stretch of the district and meets the Lohit river near Namsai in the Lohit district. One of its major tributary is the Dapha river. River Burhi-Dihing, flowing south-west, joins the Brahmaputra near Borgohaingaon in Assam. The Namphuk, the Namchik, the Namsang, the Namphai and the Tirap rivers are its main tributaries. The Tirap river originates from a high peak between Laju and Wakka in the south-western region. It flows from south-west to north-east through Tirap district and then turns north and due west in the plains to join the Burhi-Dihing near Ledo. Some other rivers in the district are the Tisa, the Taken, The Tiking, the Tising ju and Tewai.

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: