Statement (I): An alluvial channel is defined as a channel in which the flow transports sediment of the same physical characteristic as the material in the wetted surface of the channel. Statement (II): This ensures that the channel cross-section and the channel slope do not change.?

Question

Statement (I): An alluvial channel is defined as a channel in which the flow transports sediment of the same physical characteristic as the material in the wetted surface of the channel. Statement (II): This ensures that the channel cross-section and the channel slope do not change.?

Both Statement (I) and Statement (II) are individually true and Statement (II) is the correct explanation of Statement (I)
Both Statement (I) and Statement (II) are individually true but Statement (II) is not the correct explanation of Statement (I)
Statement (I) is true but Statement (II) is false
Statement (I) is false but Statement (II) is true

LohaHridoy

4 views

2025-01-04 04:42

1 Answers

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AhmedNazir · Accepted Answer · 2022-09-04T04:29:57+06:00

Option 3 : Statement (I) is true but Statement (II) is false

Statement I: True

Alluvial channel are those channel which are excavated in alluvial soils i.e. sediments are of the same physical characteristic as the material in the surface of channel. These channels are designed by using the following theories:

1. Kennedy’s theory

2. Lacey’s Theory

3. Sediment Transport Theory

Statement II: False

The channel cross-section and the channel slope may or may not change depending on whether the silting or scouring take place or not in channel.

If there is neither silting nor scouring takes place, then only channel slope and cross-section do not change and such channel is called regime or stable channel.