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1) A river is 100 m wide and 8 m deep. The bed slope is 1 m per 2 km. The median sediment size is 10 mm. Estimate (a) the critical shear stress, (b) the sediment bed load using the Du Boys equation and (c) the minimum stable sediment size.

1) A river is 100 m wide and 8 m deep. The bed slope is 1 m per 2 km. The median sediment size is 10 mm. Estimate (a) the critical shear stress, (b) the sediment bed load using the Du Boys equation and (c) the minimum stable sediment size.

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Show all steps: 1) A river is 100 m wide and 8 m deep. The bed slope is 1 m per 2 km. The median sediment size is 10 mm. Estimate (a) the critical shear stress, (b) the sediment bed load using the Du Boys equation and (c) the minimum stable sediment size. Ans: a) 9.06 N/m^2 b) 0.15 m^3/s c) 37.5mm 2) Further downstream, the river in Problem 1 traverses a plain where D50 = 0.5 mm. Estimate the total sediment load. River dimensions are unchanged, Manning's n = 0.02. Ans: 1.38 m^3/s (using Ackers-White)
Transcribed Image Text:Show all steps: 1) A river is 100 m wide and 8 m deep. The bed slope is 1 m per 2 km. The median sediment size is 10 mm. Estimate (a) the critical shear stress, (b) the sediment bed load using the Du Boys equation and (c) the minimum stable sediment size. Ans: a) 9.06 N/m^2 b) 0.15 m^3/s c) 37.5mm 2) Further downstream, the river in Problem 1 traverses a plain where D50 = 0.5 mm. Estimate the total sediment load. River dimensions are unchanged, Manning's n = 0.02. Ans: 1.38 m^3/s (using Ackers-White)
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