Question

1. Write short notes on
a.
Alluvial soil
b. Side Valleys​

Answer 1

Answer:

Alluvial soil is the main and important soil that spreads across the river plains. They are formed by deposition of materials or sediments (alluvium) brought in down by rivers that consist of silt, sand, clay, etc. ... Alluvial soil which is found in the deltas of river is called deltaic alluvium (coastal alluvium).

A valley shoulder appears at the place where the tributary flowed into the river before the glacial period. The side valley loses its height and develops into a hanging valley. In permeable rock like limestone) a side-valley becomes a gorge. In granite or other crystalline areas a waterfall may result.

Answer 2

Answer:

Alluvial soils are soils deposited by surface water. You'll find them along rivers, in floodplains and deltas (like the Mississippi Delta), stream terraces, and areas called alluvial fans. This last category results from larger floods, causing the soil to spread out in the shape of a triangle fan.

Side valleys and tributary valleys are valleys whose brooks or rivers flow into greater ones.

Upstream, the valleys can be classified in an increasing order which is equivalent to the usual orographic order: the tributaries are ordered from those nearest to the source of the river to those nearest to the mouth of the river. A confluence is where two or more tributaries or rivers flow together.

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Explanation: