what is alluvial channel?

Answer 1

Alluvial channel is a type of river channel. The other one is called a rock-cut channel.

Rock-cut channels are usually found in the upper course of river long profile, whereas alluvial channels are found in the lower course.

Rock-cut channels are rough due to the presence of jugged rocks and outcrops. Alluvium channels on the other hand are much smoother due to the deposition of silt, soft and fine sediments on the river bed. This results in the channel to be rounder and develop a symmetrical cross-section.

If you learn about the Manning's equation, you will learn that alluvium channel, though has gentler gradient than rock-cut channel, will have higher velocity because of the alluvium and sediment deposition.

I hope this answers your question =)

Answer 2

Alluvial Channel

Answer 3

Alluvial channel: a channel formed by a river in its own sediments

Answer 4

The little spikes in the topographic lines would be water channels. As water runs down the face of the fan it will cut small channels. These channels represent a change in topography. The spikes will always point up to a higher elevation, thus indicating the direction of flow in the opposite direction. Only the main channels are marked as blue lines in the map but the smaller channels can be seen in the topographic lines. If you have a look at other topo map with hills and creeks you will notice that the topo lines that spike in the creeks will point up stream indicating a small channel

Answer 5

It drains the alluvial plain, making alluvial deposits. Here's explanation and diagram:
http://www.uwsp.edu/geo/faculty/ritter/geog101/textbook/fluvial_systems/alluvial_landforms_page_1.html

Answer 6

Channel of water with deposits of clay, silt, sand, gravel and other sediments.