47.4. Comparison between Kennedy’s and Lacey’s Theories

Try these first

1. 1.

   What is the key focus of Kennedy’s theory?

   Hint

   Think about what maintains sediment suspension.

2. 2.

   What year was Lacey's theory developed?

   Hint

   It’s the second theory mentioned in the section.

3. 3.

   What is the key focus of Kennedy's theory?

   • Drainage management
   • Critical velocity to prevent silting
   • Flood control

   Hint

   Focus on what keeps silt suspended.

4. 4.

   True or False: Lacey's Theory accounts for various sediment sizes through a silt factor.

   • True
   • False

   Hint

   Think about Lacey’s approach to sediment management.

5. 5.

   If a channel designed using Lacey’s theory experiences a change in sediment type resulting in a larger silt factor, how would this impact the channel design calculations?

   Hint

   Consider how sediment characteristics affect flow.

6. 6.

   Evaluate the effectiveness of using Kennedy's theory in modern channel systems, particularly in multi-regional applications. What alterations could be made?

   Hint

   Think about the diversity in modern canal systems.