Name any three divisions of Himalayas on the basis of regions from West to East and also write one main feature of each. The Himalayas have been divided on the basis of regions from west to east.
Yarlung Tsangpo River in Tibet. In Tibet, the Tsangpo receives a number of tributaries. After passing Pi Pe in Tibet, the river turns suddenly to the north and northeast and cuts a course through a succession of great narrow gorges between the mountainous massifs of Gyala Peri and Namcha Barwa in a series of rapids and cascades.
During that stretch, the river enters northern Arunachal Pradesh state in northeastern India, where it is known as the Dihang or Siang River, and turns more southerly. Assam and adjoining region[ edit ] Brahmaputra basin in India A view of sunset in the Brahmaputra from Dibrugarh The Brahmaputra enters India in the state of Arunachal Pradeshwhere it is called Siang.
It makes a very rapid descent from its original height in Tibet, and finally appears in the plains, where it is called Dihang. The Dihang, winding out of the mountains, turns toward the southeast and descends into a low-lying basin as it enters northeastern Assam state.
Just west of the town of Sadiya, the river again turns to the southwest and is joined by two mountain streams, the Lohit and the Dibang.
The main tributaries from the hills and from the plateau to the south are the Burhi Dihing, the Disang, the Dikhu, and the Kopili. Between Dibrugarh and Lakhimpur Districtsthe river divides into two channels—the northern Kherkutia channel and the southern Brahmaputra channel.
Because of the river's narrow width, the Battle of Saraighat was fought here in March Bangladesh[ edit ] Rivers of Bangladesh, including the Brahmaputra In Bangladesh, the Brahmaputra is joined by the Teesta River or Tistaone of its largest tributaries. Below the Tista, the Brahmaputra splits into two distributary branches.
The eastern branch, formerly the larger, but now much smaller, is called the lower or old Brahmaputra Brommoputro. It curves southeast to join the Meghna River near Dhaka. This final part of the river is called Meghna.
Before its confluence with the Ganga, the Jamuna receives the combined waters of the BaralAtraiand Hurasagar Rivers on its right bank and becomes the point of departure of the large Dhaleswari River on its left bank. After several smaller channels branch off to feed the Ganga-Brahmaputra delta to the south, the main body of the Padma reaches its confluence with the Meghna River near Chandpur and then enters the Bay of Bengal through the Meghna estuary and lesser channels flowing through the delta.
The growth of the Ganga-Brahmaputra Delta is dominated by tidal processes. A region of significant tectonic activity has developed in the Jamuna River and is associated with the Himalayan uplift and development of the Bengal foredeep. Several researchers has hypothesized that the underlying structural control on the location of the major river systems of Bangladesh.
A zone of 'structural weakness' along the present course of the Ganga-Jamuna-Padma Rivers due to either a subsiding trough or a fault at depth has been observed by Morgan and Melntire.
Scijmonsbergen contends that width changes in the Jamuna may respond to these faults and they may also cause increased sedimentation upstream of the fault. He presented a few images to argue that a fault downstream of the Bangabandhu Multipurpose Bridge has affected channel migration.
The tectonic and climatic context for the large water and sediment discharges in the rivers of Bangladesh was set by the ongoing subsidence in the Bengal Basin, combined with high rates of Himalayan uplift.
The control of uplift and subsidence is, however, clear. The courses of the Jamuna and Ganga Rivers are first-order controls due to the fact that they are most influenced by the uplifted Plcistoccnc[ clarification needed ] terraces of the Barind and Madhupur tracts.
The attenuation of river flow due to the melting of snow in the river Brahmaputra basin affects the downstream discharge of the river. This increase in discharge due to significant retreat of snow gives rise to severe catastrophic problems such as flood and erosion.
Hydrology[ edit ] The hydrology of the Brahmaputra River is characterized by its significant rates of sediment discharge, the large and variable flows, along with its rapid channel aggradations and accelerated rates of basin denudation. Over time, the deepening of the Bengal Basin caused by erosion will results in the increase in hydraulic radius, and hence allowing for the huge accumulation of sediments fed from the Himalayan erosion by efficient sediment transportation.
Climatic change plays a crucial role in affecting the basin hydrology. Throughout the year, there is a significant rise in hydrograph, with a broad peak between July and September. The Brahmaputra River experiences two high-water seasons, one in early summer caused by snow melt in the mountains, and one in late summer caused by runoff from monsoon rains.it is largest delta in the world.
it is not only well watered but also the most fertile. it has become the fastest growing delta in world it is home of Royal Bengal tiger. The Northern Plain The Northern Plain was formed by the deposits brought in by the three major rivers and their tributaries.
(i) The Indus (ii) The Ganga (iii) The Brahmaputra Alluvium was deposited at the foot–hills of the Himalayas for millions of years. These deposits are now the fertile Northern Plains. The system comprises the drainage basins of three international rivers, the Ganga, the Brahmaputra, and the Barak or Meghna.
This is also called the Greater Ganga Basin and is shown in figure 1, with a schematic developmental sketch in figure 2 showing the projects and the schemes. (i) It is the largest delta of the world. (ii) It is the most fertile delta of the world. (iii) It is formed by the Ganga and the Brahmaputra river.
(iv) The lower part of the delta is marshy. Sedimentation Patterns in the Ganges-Brahmaputra Delta System* Irina Overeem. 1, K. Rogers1, Characteristics of associated islands, such as nearest-edge to water distance, are determined for each of the characteristic channel order classes.
Sedimentation Patterns in the Ganges-Brahmaputra Delta System; # (). question_answer55) Give four characteristics of the Ganga Brahmaputra delta. View Answer play_arrow question_answer 56) Explain the use of salt water lakes in India with particular reference to Chilika and Sambhar lakes.