Chegg Guided Solutions for Water Resources Engineering 2nd
Edition: Chapter 18.3  Chapter: Problem: 0 Stars(0 users)   •
Step 1 of 1      6534-18.3-1P AID: 1825 | 08/02/2013      Find
the critical shear stress by using the formula      Denote
Specific weight of sediment particle as , Specific weight of
water as , Specific gravity as g, Sand size as , Critical shear
stress as , and actual shear stress as      Use the shields
formula to compute from shields diagram      From shields
diagram the value is taken as 0.065      Find the critical shear
stress by substituting the values of 2.65 for , for
Therefore, the critical shear stress is      Find the actual
shear stress using the formula      Denote Depth of wide
rectangular channel as y (R=y)      Find the actual shear stress
by substituting the values of 2.5 m for R, 9810 kg/m3 for γ, and
0.0003 for S      Therefore, the actual shear stress is      The
actual shear stress is much larger than the critical shear
stress; transport of the fine sand particles