In a gradually varied flow -

- 1
  
  the slopes of energy grade line. hydraulic grade line and bottom of the channel are same
- 2
  
  the slopes of energy grade line and hydraulic grade line are same but slope of the bottom of channel is different
- 3
  
  the slopes of hydraulic grade line and bottom of channel are same but slope of energy grade line is different
- 4
  
  the slope of energy grade line, hydraulic grade line and bottom of channel are all different

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