6.2. Assumptions behind Gradually Varied Flow

Try these first

1. 1.

   What is meant by a prismatic channel?

   Hint

   Think about the shape and size of a channel.

2. 2.

   Define steady flow.

   Hint

   Consider the factors that remain constant.

3. 3.

   What defines gradually varied flow?

   • Steady flow with constant depth
   • Flow depth changes gradually
   • Rapidly changing flow
   • Uniform flow properties

   Hint

   Focus on the meaning of 'gradual' in fluid dynamics.

4. 4.

   True or False: A small channel bed slope is not significant in gradually varied flow.

   • True
   • False

   Hint

   Consider how slope impacts fluid behavior.

5. 5.

   If a channel is modified to have varying cross-sections, how would that impact the assumptions of gradually varied flow? Discuss potential issues and recalibration needed for analysis.

   Hint

   Think of what happens when a uniform input leads to varied outputs.

6. 6.

   Consider waters flowing down a sloped channel. If the slope exceeds 'a small slope', describe the changes in flow characteristics and stability.

   Hint

   Visualize how steepness affects downhill movement.