Tag: exogenic processes part-1

Erosion is the action of surface processes that remove soil, rock, or dissolved material from one location on the Earth's crust, and then transport it away to another location. The particulate breakdown of rock or soil into clastic sediment is referred to as physical or mechanical erosion; this contrasts with chemical erosion, where soil or rock material is removed from an area by its dissolving into a solvent, followed by the flow away of that solution. Eroded sediment or solutes may be transported just a few millimeters, or for thousands of kilometers.

Natural rates of erosion are controlled by the action of geomorphic drivers, such as rainfall or bedrock wear in rivers or coastal erosion by the sea and waves or glacial plucking, abrasion, and scour; areal flooding; wind abrasion; groundwater processes; and mass movement processes in steep landscapes like landslides and debris flows.

The place of origin of a river is called Source of the river. The beginning of a river, when it flows quickly with lots of energy, is called the young stage or the source. This age is also called as upper age. The river here is smaller and usually has a rapid, tumbling flow that cuts a narrow channel through rocky hills or mountains.

The V-shaped valley is formed in the youthful stage of the fluvial cycle of erosion and in the initial stage of valley development. It is deep and steep-sided river valley, both the valley sides meet together at the valley floor and thus water always touches the valley sides. The V-shaped valley is the result of the accelerated rate of downcutting.

Brahmaputra river is known as Jamua in Bangladesh.

The Sundarban forest lies in the vast delta on the Bay of Bengal formed by the super confluence of the Ganges, Hooghly, Padma, Brahmaputra and Meghna rivers across southern Bangladesh. The seasonally flooded Sundarbans freshwater swamp forests lie inland from the mangrove forests on the coastal fringe.

The Brahmaputra River, also called Yarlung Tsangpo in Tibetan language. The river originates on the Angsi Glacier located on the northern side of the Himalayas in Burang County of Tibet.