NEET BIOLOGY

Detailed explanation-1: -When the stream comes down from the hills to plain areas with the eroded and transported materials, the absence of slope/gradient causes the river to lose it energy to further carry those transported materials. As a result, the load of the river starts to settle down which is termed as deposition.

Detailed explanation-2: -Deposition is the laying down of sediment carried by wind, flowing water, the sea or ice. Sediment can be transported as pebbles, sand and mud, or as salts dissolved in water. Salts may later be deposited by organic activity (e.g. as sea shells) or by evaporation.

Detailed explanation-3: -When the velocity of wind or water slows, eroded sediment is deposited in a new location. The sediment builds up in a process called sedimentation and creates fertile land. River deltas are made almost entirely of sediment that has eroded from the banks and bed of a river.

Detailed explanation-4: -River Processes: erosion, transportation and deposition & the Hjulström Curve. There are three main types of processes that occur in a river. These are erosion, transportation and deposition. All three depend on the amount of energy there is in a river.

Detailed explanation-5: -Delta is a “depositional feature of a river formed at the mouth of the river. These are wetlands that form as rivers empty their water and sediment into another body of water, such as an ocean, lake, or another river. It is a characteristic feature of a river in its senile stage (old).