Answer:
The differences between Kennedy's and Lacey's theory are:
- Lacey's Theory takes into account the variation of the various parameters such as the roughness coefficient and the conveyance of the channel with the change in discharge, while Kennedy's theory only considers the variation of velocity with discharge in his design equations.
- Lacey's Theory considers the regime conditions and the shape of the channel to calculate sediment transport, while Kennedy's theory assumes that sediment transport is a function of velocity alone.
- Lacey presents his regime theory in terms of empirical equations for critical velocity, critical depth and sediment transport rate, while Kennedy relies more on theoretical derivations without providing specific equations for practical application.
Step-by-step explanation: