+1 vote
in Irrigation Engineering by (75.2k points)
What type of river stage widens the bed?

(a) Degrading

(b) Incised River Stage

(c) Boulder River Stage

(d) Stable Type

This question was posed to me in a national level competition.

Question is taken from Classification of Rivers in portion Rivers Behaviour, Control and Training of Irrigation Engineering

1 Answer

0 votes
by (106k points)
The correct option is (c) Boulder River Stage

Easiest explanation: The river bed in these reaches is created by itself, consists a mixture of boulders, gravels, shingles, and alluvial sand deposits. In latter stage, the river flows through deep well defined beds and wider floodplains. Here the river flows in a straight course. Due to the floods, the boulders and material travels downward and gets deposited there after floods. Because of the opposition to the flow due to these obstructions the river takes new course and thus widens the river bed.

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