According to Lacey, depth of scour in a river depends upon the straightness of the reach. If D is the depth of scour in regime flow in a right angled bend, it is
  • a)
     
    1.25 D
  • b)
    1.50 D
  • c)
    1.75 D
  • d)
    2.00 D
Correct answer is option 'D'. Can you explain this answer?

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Answers

Ved Kumar
Jun 25, 2021
- When equation (15) is applied to rivers in flood the value of R gives the normal depth of scour. Hence this formula is very useful in determining the levels of foundations, vertical cutoffs etc. This formula is popularly called Lacey's scour depth formula.
- Lacey's regime scours depth is given by. Where q is discharged per unit width and f is silt factor.
- According to Lacey, the depth of scour in a river depends upon the straightness of the reach. If D is the depth of scour in regime flow in a right-angled bend, it is  2.00 D

Pritam Singh
Jun 25, 2021
When equation (15) is applied to rivers in flood the value of R gives the normal depth of scour. Hence this formula is very useful in determining the levels of foundations, vertical cutoffs etc. This formula is popularly called Lacey's scour depth formula.
Lacey's regime scours depth is given by. Where q is discharged per unit width and f is silt factor.
- According to Lacey, the depth of scour in a river depends upon the straightness of the reach. If D is the depth of scour in regime flow in a right-angled bend, it is 
2.00 D

- When equation (15) is applied to rivers in flood the value of R gives the normal depth of scour. Hence this formula is very useful in determining the levels of foundations, vertical cutoffs etc. This formula is popularly called Lacey's scour depth formula.- Lacey's regime scours depth is given by. Where q is discharged per unit width and f is silt factor.- According to Lacey, the depth of scour in a river depends upon the straightness of the reach. If D is the depth of scour in regime flow in a right-angled bend, it is 2.00 D
- When equation (15) is applied to rivers in flood the value of R gives the normal depth of scour. Hence this formula is very useful in determining the levels of foundations, vertical cutoffs etc. This formula is popularly called Lacey's scour depth formula.- Lacey's regime scours depth is given by. Where q is discharged per unit width and f is silt factor.- According to Lacey, the depth of scour in a river depends upon the straightness of the reach. If D is the depth of scour in regime flow in a right-angled bend, it is 2.00 D